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| <div class="textblock"><code>#include "<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>"</code><br/> |
| </div> |
| <p><a href="canny_8cl_source.xhtml">Go to the source code of this file.</a></p> |
| <table class="memberdecls"> |
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| Macros</h2></td></tr> |
| <tr class="memitem:ac243bfa96aa2c28014159ff098bd2324"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#ac243bfa96aa2c28014159ff098bd2324">EDGE</a>   255</td></tr> |
| <tr class="separator:ac243bfa96aa2c28014159ff098bd2324"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a242e5ec23ae26cd2dfa5eab5ae68a0f1"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#a242e5ec23ae26cd2dfa5eab5ae68a0f1">hysteresis_local_stack_L1</a>   8</td></tr> |
| <tr class="separator:a242e5ec23ae26cd2dfa5eab5ae68a0f1"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:aa55093fb165fb76898efb3ba80f62bae"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#aa55093fb165fb76898efb3ba80f62bae">hysteresis_local_stack_L2</a>   16</td></tr> |
| <tr class="separator:aa55093fb165fb76898efb3ba80f62bae"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a64ee229d1bcee88c8017356d5d485650"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(early_test, x_pos, y_pos, x_cur, y_cur)</td></tr> |
| <tr class="memdesc:a64ee229d1bcee88c8017356d5d485650"><td class="mdescLeft"> </td><td class="mdescRight">Check whether pixel is valid. <a href="#a64ee229d1bcee88c8017356d5d485650">More...</a><br/></td></tr> |
| <tr class="separator:a64ee229d1bcee88c8017356d5d485650"><td class="memSeparator" colspan="2"> </td></tr> |
| </table><table class="memberdecls"> |
| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a> |
| Functions</h2></td></tr> |
| <tr class="memitem:a92f95668118a1bc6ef0eed965dfd570f"><td class="memItemLeft" align="right" valign="top">__kernel void </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#a92f95668118a1bc6ef0eed965dfd570f">combine_gradients_L1</a> (__global uchar *src1_ptr, uint src1_stride_x, uint src1_step_x, uint src1_stride_y, uint src1_step_y, uint src1_offset_first_element_in_bytes, __global uchar *src2_ptr, uint src2_stride_x, uint src2_step_x, uint src2_stride_y, uint src2_step_y, uint src2_offset_first_element_in_bytes, __global uchar *grad_ptr, uint grad_stride_x, uint grad_step_x, uint grad_stride_y, uint grad_step_y, uint grad_offset_first_element_in_bytes, __global uchar *angle_ptr, uint angle_stride_x, uint angle_step_x, uint angle_stride_y, uint angle_step_y, uint angle_offset_first_element_in_bytes)</td></tr> |
| <tr class="memdesc:a92f95668118a1bc6ef0eed965dfd570f"><td class="mdescLeft"> </td><td class="mdescRight">Calculate the magnitude and phase from horizontal and vertical result of sobel result. <a href="#a92f95668118a1bc6ef0eed965dfd570f">More...</a><br/></td></tr> |
| <tr class="separator:a92f95668118a1bc6ef0eed965dfd570f"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a7046357526e2f95a34e3ffa217752d9f"><td class="memItemLeft" align="right" valign="top">__kernel void </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#a7046357526e2f95a34e3ffa217752d9f">combine_gradients_L2</a> (__global uchar *src1_ptr, uint src1_stride_x, uint src1_step_x, uint src1_stride_y, uint src1_step_y, uint src1_offset_first_element_in_bytes, __global uchar *src2_ptr, uint src2_stride_x, uint src2_step_x, uint src2_stride_y, uint src2_step_y, uint src2_offset_first_element_in_bytes, __global uchar *grad_ptr, uint grad_stride_x, uint grad_step_x, uint grad_stride_y, uint grad_step_y, uint grad_offset_first_element_in_bytes, __global uchar *angle_ptr, uint angle_stride_x, uint angle_step_x, uint angle_stride_y, uint angle_step_y, uint angle_offset_first_element_in_bytes)</td></tr> |
| <tr class="memdesc:a7046357526e2f95a34e3ffa217752d9f"><td class="mdescLeft"> </td><td class="mdescRight">Calculate the gradient and angle from horizontal and vertical result of sobel result. <a href="#a7046357526e2f95a34e3ffa217752d9f">More...</a><br/></td></tr> |
| <tr class="separator:a7046357526e2f95a34e3ffa217752d9f"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a8c233c75ee1010bcec8601d559f4be68"><td class="memItemLeft" align="right" valign="top">__kernel void </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#a8c233c75ee1010bcec8601d559f4be68">suppress_non_maximum</a> (__global uchar *grad_ptr, uint grad_stride_x, uint grad_step_x, uint grad_stride_y, uint grad_step_y, uint grad_offset_first_element_in_bytes, __global uchar *angle_ptr, uint angle_stride_x, uint angle_step_x, uint angle_stride_y, uint angle_step_y, uint angle_offset_first_element_in_bytes, __global uchar *non_max_ptr, uint non_max_stride_x, uint non_max_step_x, uint non_max_stride_y, uint non_max_step_y, uint non_max_offset_first_element_in_bytes, uint lower_thr)</td></tr> |
| <tr class="memdesc:a8c233c75ee1010bcec8601d559f4be68"><td class="mdescLeft"> </td><td class="mdescRight">Perform non maximum suppression. <a href="#a8c233c75ee1010bcec8601d559f4be68">More...</a><br/></td></tr> |
| <tr class="separator:a8c233c75ee1010bcec8601d559f4be68"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:acd62ae1c9f3d7a1c7e49499d308d1904"><td class="memItemLeft" align="right" valign="top">kernel void </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#acd62ae1c9f3d7a1c7e49499d308d1904">hysteresis</a> (__global uchar *src_ptr, uint src_stride_x, uint src_step_x, uint src_stride_y, uint src_step_y, uint src_offset_first_element_in_bytes, __global uchar *out_ptr, uint out_stride_x, uint out_step_x, uint out_stride_y, uint out_step_y, uint out_offset_first_element_in_bytes, __global uchar *visited_ptr, uint visited_stride_x, uint visited_step_x, uint visited_stride_y, uint visited_step_y, uint visited_offset_first_element_in_bytes, __global uchar *recorded_ptr, uint recorded_stride_x, uint recorded_step_x, uint recorded_stride_y, uint recorded_step_y, uint recorded_offset_first_element_in_bytes, __global uchar *l1_stack_ptr, uint l1_stack_stride_x, uint l1_stack_step_x, uint l1_stack_stride_y, uint l1_stack_step_y, uint l1_stack_offset_first_element_in_bytes, __global uchar *l1_stack_counter_ptr, uint l1_stack_counter_stride_x, uint l1_stack_counter_step_x, uint l1_stack_counter_stride_y, uint l1_stack_counter_step_y, uint l1_stack_counter_offset_first_element_in_bytes, uint low_thr, uint up_thr, int width, int height)</td></tr> |
| <tr class="memdesc:acd62ae1c9f3d7a1c7e49499d308d1904"><td class="mdescLeft"> </td><td class="mdescRight">Perform hysteresis. <a href="#acd62ae1c9f3d7a1c7e49499d308d1904">More...</a><br/></td></tr> |
| <tr class="separator:acd62ae1c9f3d7a1c7e49499d308d1904"><td class="memSeparator" colspan="2"> </td></tr> |
| </table><table class="memberdecls"> |
| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="var-members"></a> |
| Variables</h2></td></tr> |
| <tr class="memitem:a65e45b2f8637f10dd14a427f37c2cd4c"><td class="memItemLeft" align="right" valign="top">__constant short4 </td><td class="memItemRight" valign="bottom"><a class="el" href="canny_8cl.xhtml#a65e45b2f8637f10dd14a427f37c2cd4c">neighbours_coords</a> []</td></tr> |
| <tr class="memdesc:a65e45b2f8637f10dd14a427f37c2cd4c"><td class="mdescLeft"> </td><td class="mdescRight">Array that holds the relative coordinates offset for the neighbouring pixels. <a href="#a65e45b2f8637f10dd14a427f37c2cd4c">More...</a><br/></td></tr> |
| <tr class="separator:a65e45b2f8637f10dd14a427f37c2cd4c"><td class="memSeparator" colspan="2"> </td></tr> |
| </table> |
| <h2 class="groupheader">Macro Definition Documentation</h2> |
| <a class="anchor" id="a64ee229d1bcee88c8017356d5d485650"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">#define check_pixel</td> |
| <td>(</td> |
| <td class="paramtype"> </td> |
| <td class="paramname">early_test, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"> </td> |
| <td class="paramname">x_pos, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"> </td> |
| <td class="paramname">y_pos, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"> </td> |
| <td class="paramname">x_cur, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"> </td> |
| <td class="paramname">y_cur </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <b>Value:</b><div class="fragment"><div class="line">{ \</div> |
| <div class="line"> if(!early_test) \</div> |
| <div class="line"> { \</div> |
| <div class="line"> <span class="comment">/* Number of elements in the local stack 1, points to next available entry */</span> \</div> |
| <div class="line"> c = *((__global <span class="keywordtype">char</span> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&l1_stack_counter, x_cur, y_cur)); \</div> |
| <div class="line"> \</div> |
| <div class="line"> if(c > (<a class="code" href="canny_8cl.xhtml#a242e5ec23ae26cd2dfa5eab5ae68a0f1">hysteresis_local_stack_L1</a> - 1)) <span class="comment">/* Stack level 1 is full */</span> \</div> |
| <div class="line"> goto pop_stack; \</div> |
| <div class="line"> \</div> |
| <div class="line"> <span class="comment">/* The pixel that has already been recorded is ignored */</span> \</div> |
| <div class="line"> if(!atomic_or((__global uint *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&recorded, x_pos, y_pos), 1)) \</div> |
| <div class="line"> { \</div> |
| <div class="line"> l1_ptr[c] = (short2)(x_pos, y_pos); \</div> |
| <div class="line"> *((__global <span class="keywordtype">char</span> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&l1_stack_counter, x_cur, y_cur)) += 1; \</div> |
| <div class="line"> } \</div> |
| <div class="line"> } \</div> |
| <div class="line"> }</div> |
| <div class="ttc" id="canny_8cl_xhtml_a242e5ec23ae26cd2dfa5eab5ae68a0f1"><div class="ttname"><a href="canny_8cl.xhtml#a242e5ec23ae26cd2dfa5eab5ae68a0f1">hysteresis_local_stack_L1</a></div><div class="ttdeci">#define hysteresis_local_stack_L1</div><div class="ttdef"><b>Definition:</b> <a href="canny_8cl_source.xhtml#l00228">canny.cl:228</a></div></div> |
| <div class="ttc" id="helpers_8h_xhtml_a009469e4d9b8fce3b6d5e97d2077827d"><div class="ttname"><a href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a></div><div class="ttdeci">__global uchar * offset(const Image *img, int x, int y)</div><div class="ttdoc">Get the pointer position of a Image. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00295">helpers.h:295</a></div></div> |
| </div><!-- fragment --> |
| <p>Check whether pixel is valid. </p> |
| <p>Skip the pixel if the early_test fails. Otherwise, it tries to add the pixel coordinate to the stack, and proceed to popping the stack instead if the stack is full</p> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">early_test</td><td>Boolean condition based on the minv check and visited buffer check </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">x_pos</td><td>X-coordinate of pixel that is going to be recorded, has to be within the boundary </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">y_pos</td><td>Y-coordinate of pixel that is going to be recorded, has to be within the boundary </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">x_cur</td><td>X-coordinate of current central pixel </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">y_cur</td><td>Y-coordinate of current central pixel </td></tr> |
| </table> |
| </dd> |
| </dl> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00242">242</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
| |
| <p>Referenced by <a class="el" href="canny_8cl_source.xhtml#l00306">hysteresis()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="ac243bfa96aa2c28014159ff098bd2324"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">#define EDGE   255</td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00227">227</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
| |
| <p>Referenced by <a class="el" href="canny_8cl_source.xhtml#l00306">hysteresis()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a242e5ec23ae26cd2dfa5eab5ae68a0f1"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">#define hysteresis_local_stack_L1   8</td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00228">228</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
| |
| <p>Referenced by <a class="el" href="canny_8cl_source.xhtml#l00306">hysteresis()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="aa55093fb165fb76898efb3ba80f62bae"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">#define hysteresis_local_stack_L2   16</td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00229">229</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
| |
| <p>Referenced by <a class="el" href="canny_8cl_source.xhtml#l00306">hysteresis()</a>.</p> |
| |
| </div> |
| </div> |
| <h2 class="groupheader">Function Documentation</h2> |
| <a class="anchor" id="a92f95668118a1bc6ef0eed965dfd570f"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">__kernel void combine_gradients_L1 </td> |
| <td>(</td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>src1_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>src2_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>grad_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>angle_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_offset_first_element_in_bytes</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Calculate the magnitude and phase from horizontal and vertical result of sobel result. </p> |
| <dl class="section note"><dt>Note</dt><dd>The calculation of gradient uses level 1 normalisation. </dd></dl> |
| <dl class="section attention"><dt>Attention</dt><dd>The input and output data types need to be passed at compile time using -DDATA_TYPE_IN and -DDATA_TYPE_OUT: e.g. -DDATA_TYPE_IN=uchar -DDATA_TYPE_OUT=short</dd></dl> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_ptr</td><td>Pointer to the source image (Vertical result of Sobel). Supported data types: S16, S32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_step_x</td><td>src1_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_step_y</td><td>src1_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_ptr</td><td>Pointer to the source image (Vertical result of Sobel). Supported data types: S16, S32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_step_x</td><td>src2_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_step_y</td><td>src2_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">grad_ptr</td><td>Pointer to the gradient output. Supported data types: U16, U32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_step_x</td><td>grad_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_step_y</td><td>grad_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">angle_ptr</td><td>Pointer to the angle output. Supported data types: U8 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_step_x</td><td>angle_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_step_y</td><td>angle_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| </table> |
| </dd> |
| </dl> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00057">57</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
| |
| <p>References <a class="el" href="tests_2validation_2_fixed_point_8h_source.xhtml#l00914">arm_compute::test::fixed_point_arithmetic::detail::abs()</a>, <a class="el" href="direct__convolution1x1_8cl_source.xhtml#l00040">CONVERT_SAT</a>, <a class="el" href="helpers_8h_source.xhtml#l00096">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="convolution3x3_8cl_source.xhtml#l00031">DATA_TYPE_OUT</a>, <a class="el" href="helpers_8h_source.xhtml#l00136">Image::ptr</a>, and <a class="el" href="fixed__point_8h_source.xhtml#l00093">VEC_DATA_TYPE</a>.</p> |
| <div class="fragment"><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> {</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// Construct images</span></div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="struct_image.xhtml">Image</a> src1 = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src1);</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <a class="code" href="struct_image.xhtml">Image</a> src2 = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src2);</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <a class="code" href="struct_image.xhtml">Image</a> grad = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(grad);</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="struct_image.xhtml">Image</a> angle = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(angle);</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// Load sobel horizontal and vertical values</span></div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE_IN, 4)</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  h = vload4(0, (__global DATA_TYPE_IN *)src1.ptr);</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE_IN, 4)</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  v = vload4(0, (__global DATA_TYPE_IN *)src2.ptr);</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">/* Calculate the gradient, using level 1 normalisation method */</span></div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a>, 4)</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  m = <a class="code" href="direct__convolution1x1_8cl.xhtml#a1f15728672380ade7a238f5e783d54d2">CONVERT_SAT</a>((<a class="code" href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#ae115fc750a92fb6a5e094998b56fcc56">abs</a>(h) + <a class="code" href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#ae115fc750a92fb6a5e094998b56fcc56">abs</a>(v)), <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE_OUT, 4));</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">/* Calculate the angle */</span></div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  float4 p = atan2pi(convert_float4(v), convert_float4(h));</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">/* Remap angle to range [0, 256) */</span></div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  p = select(p, p + 2, p < 0.0f) * 128.0f;</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">/* Store results */</span></div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  vstore4(m, 0, (__global DATA_TYPE_OUT *)grad.ptr);</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  vstore4(convert_uchar4_sat_rte(p), 0, angle.ptr);</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> }</div> |
| <div class="ttc" id="direct__convolution1x1_8cl_xhtml_a1f15728672380ade7a238f5e783d54d2"><div class="ttname"><a href="direct__convolution1x1_8cl.xhtml#a1f15728672380ade7a238f5e783d54d2">CONVERT_SAT</a></div><div class="ttdeci">#define CONVERT_SAT(a, b)</div><div class="ttdef"><b>Definition:</b> <a href="direct__convolution1x1_8cl_source.xhtml#l00040">direct_convolution1x1.cl:40</a></div></div> |
| <div class="ttc" id="helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00096">helpers.h:96</a></div></div> |
| <div class="ttc" id="struct_image_xhtml"><div class="ttname"><a href="struct_image.xhtml">Image</a></div><div class="ttdoc">Structure to hold Image information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00134">helpers.h:134</a></div></div> |
| <div class="ttc" id="fixed__point_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="fixed__point_8h_source.xhtml#l00093">fixed_point.h:93</a></div></div> |
| <div class="ttc" id="convolution3x3_8cl_xhtml_ac06f3e24d3fffd3c465d8b2a6e7c985e"><div class="ttname"><a href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a></div><div class="ttdeci">#define DATA_TYPE_OUT</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00031">convolution3x3.cl:31</a></div></div> |
| <div class="ttc" id="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail_xhtml_ae115fc750a92fb6a5e094998b56fcc56"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#ae115fc750a92fb6a5e094998b56fcc56">arm_compute::test::fixed_point_arithmetic::detail::abs</a></div><div class="ttdeci">fixed_point< T > abs(fixed_point< T > x)</div><div class="ttdef"><b>Definition:</b> <a href="tests_2validation_2_fixed_point_8h_source.xhtml#l00914">FixedPoint.h:914</a></div></div> |
| </div><!-- fragment --> |
| </div> |
| </div> |
| <a class="anchor" id="a7046357526e2f95a34e3ffa217752d9f"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">__kernel void combine_gradients_L2 </td> |
| <td>(</td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>src1_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src1_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>src2_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src2_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>grad_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>angle_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_offset_first_element_in_bytes</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Calculate the gradient and angle from horizontal and vertical result of sobel result. </p> |
| <dl class="section note"><dt>Note</dt><dd>The calculation of gradient uses level 2 normalisation </dd></dl> |
| <dl class="section attention"><dt>Attention</dt><dd>The input and output data types need to be passed at compile time using -DDATA_TYPE_IN and -DDATA_TYPE_OUT: e.g. -DDATA_TYPE_IN=uchar -DDATA_TYPE_OUT=short</dd></dl> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_ptr</td><td>Pointer to the source image (Vertical result of Sobel). Supported data types: S16, S32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_step_x</td><td>src1_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_step_y</td><td>src1_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src1_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_ptr</td><td>Pointer to the source image (Vertical result of Sobel). Supported data types: S16, S32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_step_x</td><td>src2_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_step_y</td><td>src2_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src2_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">grad_ptr</td><td>Pointer to the gradient output. Supported data types: U16, U32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_step_x</td><td>grad_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_step_y</td><td>grad_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">angle_ptr</td><td>Pointer to the angle output. Supported data types: U8 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_step_x</td><td>angle_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_step_y</td><td>angle_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| </table> |
| </dd> |
| </dl> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00121">121</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
| |
| <p>References <a class="el" href="helpers_8h_source.xhtml#l00052">CONVERT_SAT_ROUND</a>, <a class="el" href="helpers_8h_source.xhtml#l00096">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="convolution3x3_8cl_source.xhtml#l00031">DATA_TYPE_OUT</a>, <a class="el" href="helpers_8h_source.xhtml#l00136">Image::ptr</a>, and <a class="el" href="fixed__point_8h_source.xhtml#l00093">VEC_DATA_TYPE</a>.</p> |
| <div class="fragment"><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> {</div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="comment">// Construct images</span></div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <a class="code" href="struct_image.xhtml">Image</a> src1 = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src1);</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <a class="code" href="struct_image.xhtml">Image</a> src2 = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src2);</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <a class="code" href="struct_image.xhtml">Image</a> grad = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(grad);</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <a class="code" href="struct_image.xhtml">Image</a> angle = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(angle);</div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">// Load sobel horizontal and vertical values</span></div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  float4 h = convert_float4(vload4(0, (__global DATA_TYPE_IN *)src1.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>));</div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  float4 v = convert_float4(vload4(0, (__global DATA_TYPE_IN *)src2.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>));</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="comment">/* Calculate the gradient, using level 2 normalisation method */</span></div> |
| <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  float4 m = sqrt(h * h + v * v);</div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">/* Calculate the angle */</span></div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  float4 p = atan2pi(v, h);</div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">/* Remap angle to range [0, 256) */</span></div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  p = select(p, p + 2, p < 0.0f) * 128.0f;</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">/* Store results */</span></div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  vstore4(<a class="code" href="helpers_8h.xhtml#a28b2b123792a5b11a32cb05a6d327437">CONVERT_SAT_ROUND</a>(m, <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a>, 4), rte), 0, (__global <a class="code" href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a> *)grad.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  vstore4(convert_uchar4_sat_rte(p), 0, angle.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> }</div> |
| <div class="ttc" id="helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00096">helpers.h:96</a></div></div> |
| <div class="ttc" id="struct_image_xhtml"><div class="ttname"><a href="struct_image.xhtml">Image</a></div><div class="ttdoc">Structure to hold Image information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00134">helpers.h:134</a></div></div> |
| <div class="ttc" id="struct_image_xhtml_acf52c23cbd7424606c10a606524e3e32"><div class="ttname"><a href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">Image::ptr</a></div><div class="ttdeci">__global uchar * ptr</div><div class="ttdoc">Pointer to the starting postion of the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00136">helpers.h:136</a></div></div> |
| <div class="ttc" id="helpers_8h_xhtml_a28b2b123792a5b11a32cb05a6d327437"><div class="ttname"><a href="helpers_8h.xhtml#a28b2b123792a5b11a32cb05a6d327437">CONVERT_SAT_ROUND</a></div><div class="ttdeci">#define CONVERT_SAT_ROUND(x, type, round)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00052">helpers.h:52</a></div></div> |
| <div class="ttc" id="fixed__point_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="fixed__point_8h_source.xhtml#l00093">fixed_point.h:93</a></div></div> |
| <div class="ttc" id="convolution3x3_8cl_xhtml_ac06f3e24d3fffd3c465d8b2a6e7c985e"><div class="ttname"><a href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a></div><div class="ttdeci">#define DATA_TYPE_OUT</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00031">convolution3x3.cl:31</a></div></div> |
| </div><!-- fragment --> |
| </div> |
| </div> |
| <a class="anchor" id="acd62ae1c9f3d7a1c7e49499d308d1904"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">kernel void hysteresis </td> |
| <td>(</td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>src_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>src_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>out_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>out_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>out_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>out_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>out_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>visited_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>visited_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>visited_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>visited_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>visited_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>visited_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>recorded_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>recorded_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>recorded_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>recorded_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>recorded_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>recorded_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>l1_stack_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>l1_stack_counter_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_counter_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_counter_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_counter_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_counter_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>l1_stack_counter_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>low_thr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>up_thr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">int </td> |
| <td class="paramname"><em>width</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">int </td> |
| <td class="paramname"><em>height</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Perform hysteresis. </p> |
| <dl class="section attention"><dt>Attention</dt><dd>The input data_type needs to be passed at compile time using -DDATA_TYPE_IN: e.g. -DDATA_TYPE_IN=short</dd></dl> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src_ptr</td><td>Pointer to the input image. Supported data types: U8 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src_step_x</td><td>src_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src_step_y</td><td>src_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">src_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the output image. Supported data types: U8 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">out_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">out_step_x</td><td>out_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">out_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">out_step_y</td><td>out_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">out_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">visited_ptr</td><td>Pointer to the visited buffer, where pixels are marked as visited. Supported data types: U32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">visited_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">visited_step_x</td><td>visited_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">visited_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">visited_step_y</td><td>visited_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">visited_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">recorded_ptr</td><td>Pointer to the recorded buffer, where pixels are marked as recorded. Supported data types: U32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">recorded_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">recorded_step_x</td><td>recorded_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">recorded_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">recorded_step_y</td><td>recorded_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">recorded_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">l1_stack_ptr</td><td>Pointer to the l1 stack of a pixel. Supported data types: S32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_step_x</td><td>l1_stack_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_step_y</td><td>l1_stack_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">l1_stack_counter_ptr</td><td>Pointer to the l1 stack counters of an image. Supported data types: U8 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_counter_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_counter_step_x</td><td>l1_stack_counter_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_counter_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_counter_step_y</td><td>l1_stack_counter_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">l1_stack_counter_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">low_thr</td><td>The lower threshold </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">up_thr</td><td>The upper threshold </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>The width of the image. </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>The height of the image </td></tr> |
| </table> |
| </dd> |
| </dl> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00306">306</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
| |
| <p>References <a class="el" href="canny_8cl_source.xhtml#l00242">check_pixel</a>, <a class="el" href="helpers_8h_source.xhtml#l00099">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>, <a class="el" href="canny_8cl_source.xhtml#l00227">EDGE</a>, <a class="el" href="canny_8cl_source.xhtml#l00228">hysteresis_local_stack_L1</a>, <a class="el" href="canny_8cl_source.xhtml#l00229">hysteresis_local_stack_L2</a>, <a class="el" href="tests_2validation_2_fixed_point_8h_source.xhtml#l00889">arm_compute::test::fixed_point_arithmetic::detail::max()</a>, <a class="el" href="tests_2validation_2_fixed_point_8h_source.xhtml#l00884">arm_compute::test::fixed_point_arithmetic::detail::min()</a>, <a class="el" href="helpers_8h_source.xhtml#l00295">offset()</a>, <a class="el" href="helpers_8h_source.xhtml#l00136">Image::ptr</a>, <a class="el" href="helpers_8h_source.xhtml#l00138">Image::stride_x</a>, <a class="el" href="helpers_8h_source.xhtml#l00139">Image::stride_y</a>, and <a class="el" href="fixed__point_8h_source.xhtml#l00093">VEC_DATA_TYPE</a>.</p> |
| <div class="fragment"><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> {</div> |
| <div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="comment">// Create images</span></div> |
| <div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <a class="code" href="struct_image.xhtml">Image</a> src = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(src);</div> |
| <div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <a class="code" href="struct_image.xhtml">Image</a> out = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(out);</div> |
| <div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <a class="code" href="struct_image.xhtml">Image</a> visited = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(visited);</div> |
| <div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <a class="code" href="struct_image.xhtml">Image</a> recorded = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(recorded);</div> |
| <div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <a class="code" href="struct_image.xhtml">Image</a> l1_stack = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(l1_stack);</div> |
| <div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <a class="code" href="struct_image.xhtml">Image</a> l1_stack_counter = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(l1_stack_counter);</div> |
| <div class="line"><a name="l00325"></a><span class="lineno"> 325</span> </div> |
| <div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="comment">// Index</span></div> |
| <div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordtype">int</span> x = get_global_id(0);</div> |
| <div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordtype">int</span> y = get_global_id(1);</div> |
| <div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div> |
| <div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="comment">// Load value</span></div> |
| <div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  DATA_TYPE_IN val = *((__global DATA_TYPE_IN *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&src, x, y));</div> |
| <div class="line"><a name="l00332"></a><span class="lineno"> 332</span> </div> |
| <div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="comment">// If less than upper threshold set to NO_EDGE and return</span></div> |
| <div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keywordflow">if</span>(val <= up_thr)</div> |
| <div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  {</div> |
| <div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  *<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&out, x, y) = 0;</div> |
| <div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  }</div> |
| <div class="line"><a name="l00339"></a><span class="lineno"> 339</span> </div> |
| <div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="comment">// Init local stack 2</span></div> |
| <div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  short2 stack_L2[<a class="code" href="canny_8cl.xhtml#aa55093fb165fb76898efb3ba80f62bae">hysteresis_local_stack_L2</a>] = { 0 };</div> |
| <div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordtype">int</span> L2_counter = 0;</div> |
| <div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div> |
| <div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="comment">// Perform recursive hysteresis</span></div> |
| <div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">while</span>(<span class="keyword">true</span>)</div> |
| <div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  {</div> |
| <div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="comment">// Get L1 stack pointer</span></div> |
| <div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  __global short2 *l1_ptr = (__global short2 *)(l1_stack.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a> + y * l1_stack.<a class="code" href="struct_image.xhtml#a4f0b90c9ecd6e57ceb3f37332fefe8f1">stride_y</a> + x * <a class="code" href="canny_8cl.xhtml#a242e5ec23ae26cd2dfa5eab5ae68a0f1">hysteresis_local_stack_L1</a> * l1_stack.<a class="code" href="struct_image.xhtml#ae01febbfd0689ef709f3ff6fdd2abc7e">stride_x</a>);</div> |
| <div class="line"><a name="l00349"></a><span class="lineno"> 349</span> </div> |
| <div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="comment">// If the pixel has already been visited, proceed with the items in the stack instead</span></div> |
| <div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span>(atomic_or((__global uint *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&visited, x, y), 1) != 0)</div> |
| <div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  {</div> |
| <div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">goto</span> pop_stack;</div> |
| <div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  }</div> |
| <div class="line"><a name="l00355"></a><span class="lineno"> 355</span> </div> |
| <div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="comment">// Set strong edge</span></div> |
| <div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  *<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&out, x, y) = <a class="code" href="canny_8cl.xhtml#ac243bfa96aa2c28014159ff098bd2324">EDGE</a>;</div> |
| <div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div> |
| <div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="comment">// If it is the top of stack l2, we don't need check the surrounding pixels</span></div> |
| <div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span>(L2_counter > (<a class="code" href="canny_8cl.xhtml#aa55093fb165fb76898efb3ba80f62bae">hysteresis_local_stack_L2</a> - 1))</div> |
| <div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  {</div> |
| <div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">goto</span> pop_stack2;</div> |
| <div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  }</div> |
| <div class="line"><a name="l00364"></a><span class="lineno"> 364</span> </div> |
| <div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="comment">// Points to the start of the local stack;</span></div> |
| <div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordtype">char</span> c;</div> |
| <div class="line"><a name="l00367"></a><span class="lineno"> 367</span> </div> |
| <div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE_IN, 4)</div> |
| <div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  x_tmp;</div> |
| <div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  uint4 v_tmp;</div> |
| <div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div> |
| <div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="comment">// Get direction pixel indices</span></div> |
| <div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordtype">int</span> N = <a class="code" href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#ad91bb73431b4de1f4946ed949d444849">max</a>(y - 1, 0), S = <a class="code" href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#aabcf39e3917f842dbc5fbb0d802f24d5">min</a>(y + 1, height - 2), W = <a class="code" href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#ad91bb73431b4de1f4946ed949d444849">max</a>(x - 1, 0), E = <a class="code" href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#aabcf39e3917f842dbc5fbb0d802f24d5">min</a>(x + 1, width - 2);</div> |
| <div class="line"><a name="l00374"></a><span class="lineno"> 374</span> </div> |
| <div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="comment">// Check 8 pixels around for week edges where low_thr < val <= up_thr</span></div> |
| <div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  x_tmp = vload4(0, (__global DATA_TYPE_IN *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&src, W, N));</div> |
| <div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  v_tmp = vload4(0, (__global uint *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&visited, W, N));</div> |
| <div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <a class="code" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(((x_tmp.s0 <= low_thr) || v_tmp.s0 || (x_tmp.s0 > up_thr)), W, N, x, y); <span class="comment">// NW</span></div> |
| <div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <a class="code" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(((x_tmp.s1 <= low_thr) || v_tmp.s1 || (x_tmp.s1 > up_thr)), x, N, x, y); <span class="comment">// N</span></div> |
| <div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <a class="code" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(((x_tmp.s2 <= low_thr) || v_tmp.s2 || (x_tmp.s2 > up_thr)), E, N, x, y); <span class="comment">// NE</span></div> |
| <div class="line"><a name="l00381"></a><span class="lineno"> 381</span> </div> |
| <div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  x_tmp = vload4(0, (__global DATA_TYPE_IN *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&src, W, y));</div> |
| <div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  v_tmp = vload4(0, (__global uint *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&visited, W, y));</div> |
| <div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <a class="code" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(((x_tmp.s0 <= low_thr) || v_tmp.s0 || (x_tmp.s0 > up_thr)), W, y, x, y); <span class="comment">// W</span></div> |
| <div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <a class="code" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(((x_tmp.s2 <= low_thr) || v_tmp.s2 || (x_tmp.s2 > up_thr)), E, y, x, y); <span class="comment">// E</span></div> |
| <div class="line"><a name="l00386"></a><span class="lineno"> 386</span> </div> |
| <div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  x_tmp = vload4(0, (__global DATA_TYPE_IN *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&src, W, S));</div> |
| <div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  v_tmp = vload4(0, (__global uint *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&visited, W, S));</div> |
| <div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <a class="code" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(((x_tmp.s0 <= low_thr) || v_tmp.s0 || (x_tmp.s0 > up_thr)), W, S, x, y); <span class="comment">// SW</span></div> |
| <div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <a class="code" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(((x_tmp.s1 <= low_thr) || v_tmp.s1 || (x_tmp.s1 > up_thr)), x, S, x, y); <span class="comment">// S</span></div> |
| <div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <a class="code" href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a>(((x_tmp.s2 <= low_thr) || v_tmp.s2 || (x_tmp.s2 > up_thr)), E, S, x, y); <span class="comment">// SE</span></div> |
| <div class="line"><a name="l00392"></a><span class="lineno"> 392</span> </div> |
| <div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="preprocessor">#undef check_pixel</span></div> |
| <div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00395"></a><span class="lineno"> 395</span> pop_stack:</div> |
| <div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  c = *((__global <span class="keywordtype">char</span> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&l1_stack_counter, x, y));</div> |
| <div class="line"><a name="l00397"></a><span class="lineno"> 397</span> </div> |
| <div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">if</span>(c >= 1)</div> |
| <div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  {</div> |
| <div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  *((__global <span class="keywordtype">char</span> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&l1_stack_counter, x, y)) -= 1;</div> |
| <div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  int2 l_c = convert_int2(l1_ptr[c - 1]);</div> |
| <div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div> |
| <div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="comment">// Push the current position into level 2 stack</span></div> |
| <div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  stack_L2[L2_counter].x = x;</div> |
| <div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  stack_L2[L2_counter].y = y;</div> |
| <div class="line"><a name="l00406"></a><span class="lineno"> 406</span> </div> |
| <div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  x = l_c.x;</div> |
| <div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  y = l_c.y;</div> |
| <div class="line"><a name="l00409"></a><span class="lineno"> 409</span> </div> |
| <div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  L2_counter++;</div> |
| <div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div> |
| <div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">continue</span>;</div> |
| <div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  }</div> |
| <div class="line"><a name="l00414"></a><span class="lineno"> 414</span> </div> |
| <div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keywordflow">if</span>(L2_counter > 0)</div> |
| <div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  {</div> |
| <div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordflow">goto</span> pop_stack2;</div> |
| <div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  }</div> |
| <div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  {</div> |
| <div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  }</div> |
| <div class="line"><a name="l00423"></a><span class="lineno"> 423</span> </div> |
| <div class="line"><a name="l00424"></a><span class="lineno"> 424</span> pop_stack2:</div> |
| <div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  L2_counter--;</div> |
| <div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  x = stack_L2[L2_counter].x;</div> |
| <div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  y = stack_L2[L2_counter].y;</div> |
| <div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  };</div> |
| <div class="line"><a name="l00429"></a><span class="lineno"> 429</span> }</div> |
| <div class="ttc" id="canny_8cl_xhtml_a242e5ec23ae26cd2dfa5eab5ae68a0f1"><div class="ttname"><a href="canny_8cl.xhtml#a242e5ec23ae26cd2dfa5eab5ae68a0f1">hysteresis_local_stack_L1</a></div><div class="ttdeci">#define hysteresis_local_stack_L1</div><div class="ttdef"><b>Definition:</b> <a href="canny_8cl_source.xhtml#l00228">canny.cl:228</a></div></div> |
| <div class="ttc" id="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail_xhtml_aabcf39e3917f842dbc5fbb0d802f24d5"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#aabcf39e3917f842dbc5fbb0d802f24d5">arm_compute::test::fixed_point_arithmetic::detail::min</a></div><div class="ttdeci">fixed_point< T > min(fixed_point< T > x, fixed_point< T > y)</div><div class="ttdef"><b>Definition:</b> <a href="tests_2validation_2_fixed_point_8h_source.xhtml#l00884">FixedPoint.h:884</a></div></div> |
| <div class="ttc" id="helpers_8h_xhtml_a4334a4a76f8e9628c0fb9e1acf616e2a"><div class="ttname"><a href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT_NO_STEP(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00099">helpers.h:99</a></div></div> |
| <div class="ttc" id="helpers_8h_xhtml_a009469e4d9b8fce3b6d5e97d2077827d"><div class="ttname"><a href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a></div><div class="ttdeci">__global uchar * offset(const Image *img, int x, int y)</div><div class="ttdoc">Get the pointer position of a Image. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00295">helpers.h:295</a></div></div> |
| <div class="ttc" id="canny_8cl_xhtml_ac243bfa96aa2c28014159ff098bd2324"><div class="ttname"><a href="canny_8cl.xhtml#ac243bfa96aa2c28014159ff098bd2324">EDGE</a></div><div class="ttdeci">#define EDGE</div><div class="ttdef"><b>Definition:</b> <a href="canny_8cl_source.xhtml#l00227">canny.cl:227</a></div></div> |
| <div class="ttc" id="struct_image_xhtml"><div class="ttname"><a href="struct_image.xhtml">Image</a></div><div class="ttdoc">Structure to hold Image information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00134">helpers.h:134</a></div></div> |
| <div class="ttc" id="struct_image_xhtml_acf52c23cbd7424606c10a606524e3e32"><div class="ttname"><a href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">Image::ptr</a></div><div class="ttdeci">__global uchar * ptr</div><div class="ttdoc">Pointer to the starting postion of the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00136">helpers.h:136</a></div></div> |
| <div class="ttc" id="fixed__point_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="fixed__point_8h_source.xhtml#l00093">fixed_point.h:93</a></div></div> |
| <div class="ttc" id="canny_8cl_xhtml_a64ee229d1bcee88c8017356d5d485650"><div class="ttname"><a href="canny_8cl.xhtml#a64ee229d1bcee88c8017356d5d485650">check_pixel</a></div><div class="ttdeci">#define check_pixel(early_test, x_pos, y_pos, x_cur, y_cur)</div><div class="ttdoc">Check whether pixel is valid. </div><div class="ttdef"><b>Definition:</b> <a href="canny_8cl_source.xhtml#l00242">canny.cl:242</a></div></div> |
| <div class="ttc" id="canny_8cl_xhtml_aa55093fb165fb76898efb3ba80f62bae"><div class="ttname"><a href="canny_8cl.xhtml#aa55093fb165fb76898efb3ba80f62bae">hysteresis_local_stack_L2</a></div><div class="ttdeci">#define hysteresis_local_stack_L2</div><div class="ttdef"><b>Definition:</b> <a href="canny_8cl_source.xhtml#l00229">canny.cl:229</a></div></div> |
| <div class="ttc" id="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail_xhtml_ad91bb73431b4de1f4946ed949d444849"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1fixed__point__arithmetic_1_1detail.xhtml#ad91bb73431b4de1f4946ed949d444849">arm_compute::test::fixed_point_arithmetic::detail::max</a></div><div class="ttdeci">fixed_point< T > max(fixed_point< T > x, fixed_point< T > y)</div><div class="ttdef"><b>Definition:</b> <a href="tests_2validation_2_fixed_point_8h_source.xhtml#l00889">FixedPoint.h:889</a></div></div> |
| <div class="ttc" id="struct_image_xhtml_a4f0b90c9ecd6e57ceb3f37332fefe8f1"><div class="ttname"><a href="struct_image.xhtml#a4f0b90c9ecd6e57ceb3f37332fefe8f1">Image::stride_y</a></div><div class="ttdeci">int stride_y</div><div class="ttdoc">Stride of the image in Y dimension (in bytes) </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00139">helpers.h:139</a></div></div> |
| <div class="ttc" id="struct_image_xhtml_ae01febbfd0689ef709f3ff6fdd2abc7e"><div class="ttname"><a href="struct_image.xhtml#ae01febbfd0689ef709f3ff6fdd2abc7e">Image::stride_x</a></div><div class="ttdeci">int stride_x</div><div class="ttdoc">Stride of the image in X dimension (in bytes) </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00138">helpers.h:138</a></div></div> |
| </div><!-- fragment --> |
| </div> |
| </div> |
| <a class="anchor" id="a8c233c75ee1010bcec8601d559f4be68"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">__kernel void suppress_non_maximum </td> |
| <td>(</td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>grad_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>grad_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>angle_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>angle_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">__global uchar * </td> |
| <td class="paramname"><em>non_max_ptr</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>non_max_stride_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>non_max_step_x</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>non_max_stride_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>non_max_step_y</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>non_max_offset_first_element_in_bytes</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">uint </td> |
| <td class="paramname"><em>lower_thr</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Perform non maximum suppression. </p> |
| <dl class="section attention"><dt>Attention</dt><dd>The input and output data types need to be passed at compile time using -DDATA_TYPE_IN and -DDATA_TYPE_OUT: e.g. -DDATA_TYPE_IN=uchar -DDATA_TYPE_OUT=short</dd></dl> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_ptr</td><td>Pointer to the gradient output. Supported data types: S16, S32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_step_x</td><td>grad_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_step_y</td><td>grad_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">grad_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_ptr</td><td>Pointer to the angle output. Supported data types: U8 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_step_x</td><td>angle_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_step_y</td><td>angle_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">angle_offset_first_element_in_bytes</td><td>TThe offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[out]</td><td class="paramname">non_max_ptr</td><td>Pointer to the non maximum suppressed output. Supported data types: U16, U32 </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">non_max_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">non_max_step_x</td><td>non_max_stride_x * number of elements along X processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">non_max_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">non_max_step_y</td><td>non_max_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">non_max_offset_first_element_in_bytes</td><td>The offset of the first element of the output </td></tr> |
| <tr><td class="paramdir">[in]</td><td class="paramname">lower_thr</td><td>The low threshold </td></tr> |
| </table> |
| </dd> |
| </dl> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00191">191</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
| |
| <p>References <a class="el" href="helpers_8h_source.xhtml#l00096">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="convolution3x3_8cl_source.xhtml#l00031">DATA_TYPE_OUT</a>, <a class="el" href="helpers_8h_source.xhtml#l00295">offset()</a>, and <a class="el" href="helpers_8h_source.xhtml#l00136">Image::ptr</a>.</p> |
| <div class="fragment"><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> {</div> |
| <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="comment">// Construct images</span></div> |
| <div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="struct_image.xhtml">Image</a> grad = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(grad);</div> |
| <div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <a class="code" href="struct_image.xhtml">Image</a> angle = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(angle);</div> |
| <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <a class="code" href="struct_image.xhtml">Image</a> non_max = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(non_max);</div> |
| <div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div> |
| <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="comment">// Get gradient and angle</span></div> |
| <div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  DATA_TYPE_IN gradient = *((__global DATA_TYPE_IN *)grad.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div> |
| <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  uchar an = convert_ushort(*angle.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div> |
| <div class="line"><a name="l00205"></a><span class="lineno"> 205</span> </div> |
| <div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">if</span>(gradient <= lower_thr)</div> |
| <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  {</div> |
| <div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  }</div> |
| <div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div> |
| <div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">// Divide the whole round into 8 directions</span></div> |
| <div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  uchar ang = 127 - an;</div> |
| <div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <a class="code" href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a> q_an = (ang + 16) >> 5;</div> |
| <div class="line"><a name="l00214"></a><span class="lineno"> 214</span> </div> |
| <div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="comment">// Find the two pixels in the perpendicular direction</span></div> |
| <div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  short2 x_p = <a class="code" href="canny_8cl.xhtml#a65e45b2f8637f10dd14a427f37c2cd4c">neighbours_coords</a>[q_an].s02;</div> |
| <div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  short2 y_p = <a class="code" href="canny_8cl.xhtml#a65e45b2f8637f10dd14a427f37c2cd4c">neighbours_coords</a>[q_an].s13;</div> |
| <div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  DATA_TYPE_IN g1 = *((global DATA_TYPE_IN *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&grad, x_p.x, y_p.x));</div> |
| <div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  DATA_TYPE_IN g2 = *((global DATA_TYPE_IN *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&grad, x_p.y, y_p.y));</div> |
| <div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div> |
| <div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span>((gradient > g1) && (gradient > g2))</div> |
| <div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  {</div> |
| <div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  *((global <a class="code" href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a> *)non_max.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>) = gradient;</div> |
| <div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  }</div> |
| <div class="line"><a name="l00225"></a><span class="lineno"> 225</span> }</div> |
| <div class="ttc" id="helpers_8h_xhtml_a009469e4d9b8fce3b6d5e97d2077827d"><div class="ttname"><a href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a></div><div class="ttdeci">__global uchar * offset(const Image *img, int x, int y)</div><div class="ttdoc">Get the pointer position of a Image. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00295">helpers.h:295</a></div></div> |
| <div class="ttc" id="canny_8cl_xhtml_a65e45b2f8637f10dd14a427f37c2cd4c"><div class="ttname"><a href="canny_8cl.xhtml#a65e45b2f8637f10dd14a427f37c2cd4c">neighbours_coords</a></div><div class="ttdeci">__constant short4 neighbours_coords[]</div><div class="ttdoc">Array that holds the relative coordinates offset for the neighbouring pixels. </div><div class="ttdef"><b>Definition:</b> <a href="canny_8cl_source.xhtml#l00153">canny.cl:153</a></div></div> |
| <div class="ttc" id="helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00096">helpers.h:96</a></div></div> |
| <div class="ttc" id="struct_image_xhtml"><div class="ttname"><a href="struct_image.xhtml">Image</a></div><div class="ttdoc">Structure to hold Image information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00134">helpers.h:134</a></div></div> |
| <div class="ttc" id="struct_image_xhtml_acf52c23cbd7424606c10a606524e3e32"><div class="ttname"><a href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">Image::ptr</a></div><div class="ttdeci">__global uchar * ptr</div><div class="ttdoc">Pointer to the starting postion of the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00136">helpers.h:136</a></div></div> |
| <div class="ttc" id="convolution3x3_8cl_xhtml_ac06f3e24d3fffd3c465d8b2a6e7c985e"><div class="ttname"><a href="convolution3x3_8cl.xhtml#ac06f3e24d3fffd3c465d8b2a6e7c985e">DATA_TYPE_OUT</a></div><div class="ttdeci">#define DATA_TYPE_OUT</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00031">convolution3x3.cl:31</a></div></div> |
| </div><!-- fragment --> |
| </div> |
| </div> |
| <h2 class="groupheader">Variable Documentation</h2> |
| <a class="anchor" id="a65e45b2f8637f10dd14a427f37c2cd4c"></a> |
| <div class="memitem"> |
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| <table class="memname"> |
| <tr> |
| <td class="memname">__constant short4 neighbours_coords[]</td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <b>Initial value:</b><div class="fragment"><div class="line">=</div> |
| <div class="line">{</div> |
| <div class="line"> { -1, 0, 1, 0 }, </div> |
| <div class="line"> { -1, 1, 1, -1 }, </div> |
| <div class="line"> { 0, 1, 0, -1 }, </div> |
| <div class="line"> { 1, 1, -1, -1 }, </div> |
| <div class="line"> { 1, 0, -1, 0 }, </div> |
| <div class="line"> { 1, -1, -1, 1 }, </div> |
| <div class="line"> { 0, 1, 0, -1 }, </div> |
| <div class="line"> { -1, -1, 1, 1 }, </div> |
| <div class="line"> { -1, 0, 1, 0 }, </div> |
| <div class="line">}</div> |
| </div><!-- fragment --> |
| <p>Array that holds the relative coordinates offset for the neighbouring pixels. </p> |
| |
| <p>Definition at line <a class="el" href="canny_8cl_source.xhtml#l00153">153</a> of file <a class="el" href="canny_8cl_source.xhtml">canny.cl</a>.</p> |
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