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<div class="title">FastCorners.cpp</div> </div>
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<a href="reference_2_fast_corners_8cpp.xhtml">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Copyright (c) 2017-2019 ARM Limited.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * SPDX-License-Identifier: MIT</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a copy</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * of this software and associated documentation files (the &quot;Software&quot;), to</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * deal in the Software without restriction, including without limitation the</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> * sell copies of the Software, and to permit persons to whom the Software is</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * furnished to do so, subject to the following conditions:</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * The above copyright notice and this permission notice shall be included in all</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * copies or substantial portions of the Software.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment"> * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="comment"> * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="comment"> * SOFTWARE.</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_fast_corners_8h.xhtml">FastCorners.h</a>&quot;</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="tests_2validation_2reference_2_utils_8h.xhtml">Utils.h</a>&quot;</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="tests_2validation_2_helpers_8h.xhtml">tests/validation/Helpers.h</a>&quot;</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_non_maxima_suppression_8h.xhtml">tests/validation/reference/NonMaximaSuppression.h</a>&quot;</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_asserts_8h.xhtml">tests/framework/Asserts.h</a>&quot;</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#include &lt;iomanip&gt;</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacearm__compute.xhtml">arm_compute</a></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;{</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="keyword">namespace </span>test</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;{</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keyword">namespace </span>validation</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;{</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="keyword">namespace </span>reference</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;{</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="keyword">namespace</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;{</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;constexpr <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bresenham_radius = 3;</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;constexpr <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bresenham_count = 16;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="comment"> Offsets of the 16 pixels in the Bresenham circle of radius 3 centered on P</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="comment"> . . . . . . . . .</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="comment"> . . . F 0 1 . . .</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="comment"> . . E . . . 2 . .</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="comment"> . D . . . . . 3 .</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="comment"> . C . . P . . 4 .</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;<span class="comment"> . B . . . . . 5 .</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;<span class="comment"> . . A . . . 6 . .</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;<span class="comment"> . . . 9 8 7 . . .</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="comment"> . . . . . . . . .</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="comment">*/</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;<span class="keyword">const</span> std::array&lt;std::array&lt;int, 2&gt;, 16&gt; circle_offsets =</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;{</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; {</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; { { 0, -3 } }, <span class="comment">// 0 - pixel #1</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; { { 1, -3 } }, <span class="comment">// 1 - pixel #2</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; { { 2, -2 } }, <span class="comment">// 2 - pixel #3</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; { { 3, -1 } }, <span class="comment">// 3 - pixel #4</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; { { 3, 0 } }, <span class="comment">// 4 - pixel #5</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; { { 3, 1 } }, <span class="comment">// 5 - pixel #6</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; { { 2, 2 } }, <span class="comment">// 6 - pixel #7</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; { { 1, 3 } }, <span class="comment">// 7 - pixel #8</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; { { 0, 3 } }, <span class="comment">// 8 - pixel #9</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; { { -1, 3 } }, <span class="comment">// 9 - pixel #10</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; { { -2, 2 } }, <span class="comment">// A - pixel #11</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; { { -3, 1 } }, <span class="comment">// B - pixel #12</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; { { -3, 0 } }, <span class="comment">// C - pixel #13</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; { { -3, -1 } }, <span class="comment">// D - pixel #14</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; { { -2, -2 } }, <span class="comment">// E - pixel #15</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; { { -1, -3 } } <span class="comment">// F - pixel #16</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; }</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;};</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="comment"> FAST-9 bit masks for consecutive points surrounding a corner candidate</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;<span class="comment"> Rejection of non-corners is expedited by checking pixels 1, 9, then 5, 13...</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;<span class="comment">*/</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;<span class="keyword">const</span> std::array&lt;uint16_t, 16&gt; fast9_masks =</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;{</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; {</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; 0x01FF, <span class="comment">// 0000 0001 1111 1111</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; 0x03FE, <span class="comment">// 0000 0011 1111 1110</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; 0x07FC, <span class="comment">// 0000 0111 1111 1100</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; 0x0FF8, <span class="comment">// 0000 1111 1111 1000</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; 0x1FF0, <span class="comment">// 0001 1111 1111 0000</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; 0x3FE0, <span class="comment">// 0011 1111 1110 0000</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; 0x7FC0, <span class="comment">// 0111 1111 1100 0000</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; 0xFF80, <span class="comment">// 1111 1111 1000 0000</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; 0xFF01, <span class="comment">// 1111 1111 0000 0001</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; 0xFE03, <span class="comment">// 1111 1110 0000 0011</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; 0xFC07, <span class="comment">// 1111 1100 0000 0111</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; 0xF80F, <span class="comment">// 1111 1000 0000 1111</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; 0xF01F, <span class="comment">// 1111 0000 0001 1111</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; 0xE03F, <span class="comment">// 1110 0000 0011 1111</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; 0xC07F, <span class="comment">// 1100 0000 0111 1111</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; 0x80FF <span class="comment">// 1000 0000 1111 1111</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; }</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;};</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> in_range(<span class="keyword">const</span> uint8_t low, <span class="keyword">const</span> uint8_t high, <span class="keyword">const</span> uint8_t val)</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;{</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="keywordflow">return</span> low &lt;= val &amp;&amp; val &lt;= high;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;}</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T, <span class="keyword">typename</span> F&gt;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;<span class="keywordtype">bool</span> is_a_corner(<span class="keyword">const</span> Coordinates &amp;candidate, <span class="keyword">const</span> SimpleTensor&lt;T&gt; &amp;<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>, uint8_t <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a6cae310822a46019ba25a00ddb0f7e62">threshold</a>, <a class="code" href="namespacearm__compute.xhtml#a15a05537a472ee742404821851529327">BorderMode</a> <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, T constant_border_value, F intensity_at)</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;{</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> intensity_p = <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a4f489943d8618d47b1ad4611f0b9b7ff">tensor_elem_at</a>(<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>, candidate, <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, constant_border_value);</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> thresh_bright = intensity_p + <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a6cae310822a46019ba25a00ddb0f7e62">threshold</a>;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> thresh_dark = intensity_p - <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a6cae310822a46019ba25a00ddb0f7e62">threshold</a>;</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <span class="comment">// Quicker rejection of non-corner points by checking pixels 1, 9 then 5, 13 around the candidate</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> p1 = intensity_at(candidate, 0);</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> p9 = intensity_at(candidate, 8);</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> p5 = intensity_at(candidate, 4);</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> p13 = intensity_at(candidate, 12);</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keywordflow">if</span>((in_range(thresh_dark, thresh_bright, p1) &amp;&amp; in_range(thresh_dark, thresh_bright, p9))</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; || (in_range(thresh_dark, thresh_bright, p5) &amp;&amp; in_range(thresh_dark, thresh_bright, p13)))</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; {</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; }</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; uint16_t mask_bright = 0;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; uint16_t mask_dark = 0;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160;</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; <span class="comment">// Set bits of the brighter/darker pixels mask accordingly</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> n = 0; n &lt; bresenham_count; ++n)</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; {</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; T intensity_n = intensity_at(candidate, n);</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; mask_bright |= (intensity_n &gt; thresh_bright) &lt;&lt; n;</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; mask_dark |= (intensity_n &lt; thresh_dark) &lt;&lt; n;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; }</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="comment">// Mark as corner candidate if brighter/darker pixel sequence satisfies any one of the FAST-9 masks</span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> found = std::find_if(fast9_masks.begin(), fast9_masks.end(), [&amp;](decltype(fast9_masks[0]) mask)</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; {</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; <span class="keywordflow">return</span> (mask_bright &amp; mask) == mask || (mask_dark &amp; mask) == mask;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; });</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <span class="keywordflow">return</span> found != fast9_masks.end();</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160;}</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160;} <span class="comment">// namespace</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00152"></a><span class="lineno"><a class="line" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a8fdbdfcbf8a538569a6b7cd468eca939"> 152</a></span>&#160;std::vector&lt;KeyPoint&gt; <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a8fdbdfcbf8a538569a6b7cd468eca939">fast_corners</a>(<span class="keyword">const</span> <a class="code" href="classarm__compute_1_1test_1_1_simple_tensor.xhtml">SimpleTensor&lt;T&gt;</a> &amp;<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>, <span class="keywordtype">float</span> input_thresh, <span class="keywordtype">bool</span> suppress_nonmax, <a class="code" href="namespacearm__compute.xhtml#a15a05537a472ee742404821851529327">BorderMode</a> <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, T constant_border_value)</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160;{</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <span class="comment">// Get intensity of pixel at given index on the Bresenham circle around a candidate point</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> intensity_at = [&amp;](<span class="keyword">const</span> <a class="code" href="classarm__compute_1_1_coordinates.xhtml">Coordinates</a> &amp; point, <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> idx)</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; {</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> <a class="code" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a> = circle_offsets[idx];</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; <a class="code" href="classarm__compute_1_1_coordinates.xhtml">Coordinates</a> px{ point.<a class="code" href="classarm__compute_1_1_dimensions.xhtml#aa87f8fc26981b0f3228a78c83b95b802">x</a>() + <a class="code" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>[0], point.<a class="code" href="classarm__compute_1_1_dimensions.xhtml#ac4a1050be02b20b3f791b9a483f3abe2">y</a>() + <a class="code" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>[1] };</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; <span class="keywordflow">return</span> <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a4f489943d8618d47b1ad4611f0b9b7ff">tensor_elem_at</a>(<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>, px, <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, constant_border_value);</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; };</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160;</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a6cae310822a46019ba25a00ddb0f7e62">threshold</a> = static_cast&lt;uint8_t&gt;(input_thresh);</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; std::vector&lt;KeyPoint&gt; corners;</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; <span class="comment">// 1. Detect potential corners (the segment test)</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; std::vector&lt;Coordinates&gt; corner_candidates;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; <a class="code" href="classarm__compute_1_1test_1_1_simple_tensor.xhtml">SimpleTensor&lt;uint8_t&gt;</a> scores(<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>.shape(), <a class="code" href="namespacearm__compute.xhtml#ab4e88c89b3b7ea1735996cc4def22d58a6669348b484e3008dca2bfa8e85e40b5">DataType::U8</a>);</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; <a class="code" href="structarm__compute_1_1_valid_region.xhtml">ValidRegion</a> <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a7819bcbbf45c2e7c1396a137dce54422">valid_region</a> = <a class="code" href="namespacearm__compute_1_1test.xhtml#a8103df0e6c416f55f40106aa49072b42">shape_to_valid_region</a>(<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>.shape(), <a class="code" href="namespacearm__compute.xhtml#a15a05537a472ee742404821851529327a0db45d2a4141101bdfe48e3314cfbca3">BorderMode::UNDEFINED</a> == <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, <a class="code" href="structarm__compute_1_1_border_size.xhtml">BorderSize</a>(bresenham_radius));</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160;</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="keyword">const</span> uint32_t num_elements = <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>.num_elements();</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="keywordflow">for</span>(uint32_t i = 0; i &lt; num_elements; ++i)</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; {</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <a class="code" href="classarm__compute_1_1_coordinates.xhtml">Coordinates</a> candidate = <a class="code" href="namespacearm__compute_1_1test.xhtml#a24d8c0391cfa38e78969b6ad97c0ff09">index2coord</a>(<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>.shape(), i);</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; scores[i] = 0;</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; <span class="keywordflow">if</span>(!<a class="code" href="namespacearm__compute_1_1test.xhtml#a856b55fc20ddcbdbeb84c35ae27bedac">is_in_valid_region</a>(<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a7819bcbbf45c2e7c1396a137dce54422">valid_region</a>, candidate))</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; {</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; }</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; <span class="keywordflow">if</span>(is_a_corner(candidate, <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>, <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a6cae310822a46019ba25a00ddb0f7e62">threshold</a>, <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, constant_border_value, intensity_at))</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; {</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; corner_candidates.emplace_back(candidate);</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; scores[i] = 1;</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; }</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; }</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <span class="comment">// 2. Calculate corner scores if necessary</span></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; <span class="keywordflow">if</span>(suppress_nonmax)</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; {</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="keywordflow">for</span>(<span class="keyword">const</span> <span class="keyword">auto</span> &amp;candidate : corner_candidates)</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; {</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> index = <a class="code" href="namespacearm__compute_1_1test.xhtml#a9be4cb7e6ee20063a4a10bc3abb750b9">coord2index</a>(scores.shape(), candidate);</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; uint8_t thresh_max = UINT8_MAX;</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; uint8_t thresh_min = <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a6cae310822a46019ba25a00ddb0f7e62">threshold</a>;</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; uint8_t response = (thresh_min + thresh_max) / 2;</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160;</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <span class="comment">// Corner score (response) is the largest threshold for which the pixel remains a corner</span></div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; <span class="keywordflow">while</span>(thresh_max - thresh_min &gt; 1)</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; {</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; response = (thresh_min + thresh_max) / 2;</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; <span class="keywordflow">if</span>(is_a_corner(candidate, <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>, response, <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, constant_border_value, intensity_at))</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; {</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; thresh_min = response; <span class="comment">// raise threshold</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; }</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="keywordflow">else</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; {</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; thresh_max = response; <span class="comment">// lower threshold</span></div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; }</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; scores[index] = thresh_min;</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; }</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160;</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; scores = <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a60e89e48713565425943913adec65294">non_maxima_suppression</a>(scores, <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, constant_border_value);</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a7819bcbbf45c2e7c1396a137dce54422">valid_region</a> = <a class="code" href="namespacearm__compute_1_1test.xhtml#a8103df0e6c416f55f40106aa49072b42">shape_to_valid_region</a>(scores.shape(), <a class="code" href="namespacearm__compute.xhtml#a15a05537a472ee742404821851529327a0db45d2a4141101bdfe48e3314cfbca3">BorderMode::UNDEFINED</a> == <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, <a class="code" href="structarm__compute_1_1_border_size.xhtml">BorderSize</a>(bresenham_radius + 1));</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; }</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160;</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; <span class="keywordflow">for</span>(<span class="keyword">const</span> <span class="keyword">auto</span> &amp;candidate : corner_candidates)</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; {</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <span class="keyword">const</span> <span class="keyword">auto</span> index = <a class="code" href="namespacearm__compute_1_1test.xhtml#a9be4cb7e6ee20063a4a10bc3abb750b9">coord2index</a>(scores.shape(), candidate);</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; <span class="keywordflow">if</span>(scores[index] &gt; 0.f &amp;&amp; <a class="code" href="namespacearm__compute_1_1test.xhtml#a856b55fc20ddcbdbeb84c35ae27bedac">is_in_valid_region</a>(<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a7819bcbbf45c2e7c1396a137dce54422">valid_region</a>, candidate))</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; {</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; <a class="code" href="structarm__compute_1_1_key_point.xhtml">KeyPoint</a> corner;</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; corner.<a class="code" href="structarm__compute_1_1_key_point.xhtml#af6d3062751bd565decb1a2cd3b63bdb2">x</a> = candidate.x();</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; corner.<a class="code" href="structarm__compute_1_1_key_point.xhtml#af64066d134a77e01b3d6eb8da813627a">y</a> = candidate.y();</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; corner.<a class="code" href="structarm__compute_1_1_key_point.xhtml#a2c1c8f9331368f38bfc3eaee260b59a6">strength</a> = scores[index];</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; corner.<a class="code" href="structarm__compute_1_1_key_point.xhtml#a8ca2aae59762685dd38143e5f8267147">tracking_status</a> = 1;</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; corner.<a class="code" href="structarm__compute_1_1_key_point.xhtml#a1d28dec57cce925ad92342891bd71e7c">scale</a> = 0.f;</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; corner.<a class="code" href="structarm__compute_1_1_key_point.xhtml#a0e3266fc15309697502533db62b682af">orientation</a> = 0.f;</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; corner.<a class="code" href="structarm__compute_1_1_key_point.xhtml#a7cfd13d282af770aaa971755fa092fca">error</a> = 0.f;</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; corners.emplace_back(corner);</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; }</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; }</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160;</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; <span class="keywordflow">return</span> corners;</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160;}</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160;</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160;<span class="keyword">template</span> std::vector&lt;KeyPoint&gt; <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a8fdbdfcbf8a538569a6b7cd468eca939">fast_corners</a>(<span class="keyword">const</span> <a class="code" href="classarm__compute_1_1test_1_1_simple_tensor.xhtml">SimpleTensor&lt;uint8_t&gt;</a> &amp;<a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">src</a>, <span class="keywordtype">float</span> <a class="code" href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a6cae310822a46019ba25a00ddb0f7e62">threshold</a>, <span class="keywordtype">bool</span> suppress_nonmax, <a class="code" href="namespacearm__compute.xhtml#a15a05537a472ee742404821851529327">BorderMode</a> <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">border_mode</a>, uint8_t constant_border_value);</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160;} <span class="comment">// namespace reference</span></div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160;} <span class="comment">// namespace validation</span></div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160;} <span class="comment">// namespace test</span></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160;} <span class="comment">// namespace arm_compute</span></div><div class="ttc" id="namespacearm__compute_xhtml_a15a05537a472ee742404821851529327"><div class="ttname"><a href="namespacearm__compute.xhtml#a15a05537a472ee742404821851529327">arm_compute::BorderMode</a></div><div class="ttdeci">BorderMode</div><div class="ttdoc">Methods available to handle borders.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00261">Types.h:261</a></div></div>
<div class="ttc" id="src_2core_2_c_l_2cl__kernels_2_helpers_8h_xhtml_a009469e4d9b8fce3b6d5e97d2077827d"><div class="ttname"><a href="src_2core_2_c_l_2cl__kernels_2_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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00510">helpers.h:510</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_1_1validation_xhtml_a4f489943d8618d47b1ad4611f0b9b7ff"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation.xhtml#a4f489943d8618d47b1ad4611f0b9b7ff">arm_compute::test::validation::tensor_elem_at</a></div><div class="ttdeci">T tensor_elem_at(const SimpleTensor&lt; T &gt; &amp;src, Coordinates coord, BorderMode border_mode, T constant_border_value)</div><div class="ttdef"><b>Definition:</b> <a href="tests_2validation_2reference_2_utils_8h_source.xhtml#l00061">Utils.h:61</a></div></div>
<div class="ttc" id="structarm__compute_1_1_key_point_xhtml_a1d28dec57cce925ad92342891bd71e7c"><div class="ttname"><a href="structarm__compute_1_1_key_point.xhtml#a1d28dec57cce925ad92342891bd71e7c">arm_compute::KeyPoint::scale</a></div><div class="ttdeci">float scale</div><div class="ttdoc">Scale initialized to 0 by the corner detector.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00418">Types.h:418</a></div></div>
<div class="ttc" id="tests_2validation_2reference_2_utils_8h_xhtml"><div class="ttname"><a href="tests_2validation_2reference_2_utils_8h.xhtml">Utils.h</a></div></div>
<div class="ttc" id="structarm__compute_1_1_border_size_xhtml"><div class="ttname"><a href="structarm__compute_1_1_border_size.xhtml">arm_compute::BorderSize</a></div><div class="ttdoc">Container for 2D border size.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00269">Types.h:269</a></div></div>
<div class="ttc" id="structarm__compute_1_1_key_point_xhtml_af6d3062751bd565decb1a2cd3b63bdb2"><div class="ttname"><a href="structarm__compute_1_1_key_point.xhtml#af6d3062751bd565decb1a2cd3b63bdb2">arm_compute::KeyPoint::x</a></div><div class="ttdeci">int32_t x</div><div class="ttdoc">X coordinates.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00415">Types.h:415</a></div></div>
<div class="ttc" id="structarm__compute_1_1_key_point_xhtml_a0e3266fc15309697502533db62b682af"><div class="ttname"><a href="structarm__compute_1_1_key_point.xhtml#a0e3266fc15309697502533db62b682af">arm_compute::KeyPoint::orientation</a></div><div class="ttdeci">float orientation</div><div class="ttdoc">Orientation initialized to 0 by the corner detector.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00419">Types.h:419</a></div></div>
<div class="ttc" id="_fast_corners_8h_xhtml"><div class="ttname"><a href="_fast_corners_8h.xhtml">FastCorners.h</a></div></div>
<div class="ttc" id="namespacearm__compute_xhtml_ab4e88c89b3b7ea1735996cc4def22d58a6669348b484e3008dca2bfa8e85e40b5"><div class="ttname"><a href="namespacearm__compute.xhtml#ab4e88c89b3b7ea1735996cc4def22d58a6669348b484e3008dca2bfa8e85e40b5">arm_compute::Format::U8</a></div><div class="ttdoc">1 channel, 1 U8 per channel</div></div>
<div class="ttc" id="structarm__compute_1_1_key_point_xhtml_a8ca2aae59762685dd38143e5f8267147"><div class="ttname"><a href="structarm__compute_1_1_key_point.xhtml#a8ca2aae59762685dd38143e5f8267147">arm_compute::KeyPoint::tracking_status</a></div><div class="ttdeci">int32_t tracking_status</div><div class="ttdoc">Status initialized to 1 by the corner detector, set to 0 when the point is lost.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00420">Types.h:420</a></div></div>
<div class="ttc" id="tests_2validation_2_helpers_8h_xhtml"><div class="ttname"><a href="tests_2validation_2_helpers_8h.xhtml">Helpers.h</a></div></div>
<div class="ttc" id="namespacearm__compute_xhtml"><div class="ttname"><a href="namespacearm__compute.xhtml">arm_compute</a></div><div class="ttdoc">Copyright (c) 2017-2020 ARM Limited.</div><div class="ttdef"><b>Definition:</b> <a href="00__introduction_8dox_source.xhtml#l00024">00_introduction.dox:24</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_xhtml_a9be4cb7e6ee20063a4a10bc3abb750b9"><div class="ttname"><a href="namespacearm__compute_1_1test.xhtml#a9be4cb7e6ee20063a4a10bc3abb750b9">arm_compute::test::coord2index</a></div><div class="ttdeci">int coord2index(const TensorShape &amp;shape, const Coordinates &amp;coord)</div><div class="ttdoc">Linearise the given coordinate.</div><div class="ttdef"><b>Definition:</b> <a href="tests_2_utils_8h_source.xhtml#l00485">Utils.h:485</a></div></div>
<div class="ttc" id="structarm__compute_1_1_key_point_xhtml"><div class="ttname"><a href="structarm__compute_1_1_key_point.xhtml">arm_compute::KeyPoint</a></div><div class="ttdoc">Keypoint type.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00413">Types.h:413</a></div></div>
<div class="ttc" id="_non_maxima_suppression_8h_xhtml"><div class="ttname"><a href="_non_maxima_suppression_8h.xhtml">NonMaximaSuppression.h</a></div></div>
<div class="ttc" id="structarm__compute_1_1_key_point_xhtml_a2c1c8f9331368f38bfc3eaee260b59a6"><div class="ttname"><a href="structarm__compute_1_1_key_point.xhtml#a2c1c8f9331368f38bfc3eaee260b59a6">arm_compute::KeyPoint::strength</a></div><div class="ttdeci">float strength</div><div class="ttdoc">Strength of the point.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00417">Types.h:417</a></div></div>
<div class="ttc" id="classarm__compute_1_1_dimensions_xhtml_aa87f8fc26981b0f3228a78c83b95b802"><div class="ttname"><a href="classarm__compute_1_1_dimensions.xhtml#aa87f8fc26981b0f3228a78c83b95b802">arm_compute::Dimensions::x</a></div><div class="ttdeci">T x() const</div><div class="ttdoc">Alias to access the size of the first dimension.</div><div class="ttdef"><b>Definition:</b> <a href="_dimensions_8h_source.xhtml#l00081">Dimensions.h:81</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_1_1validation_xhtml_a5471e46933e7a9c4709972d91fc4ea65"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation.xhtml#a5471e46933e7a9c4709972d91fc4ea65">arm_compute::test::validation::border_mode</a></div><div class="ttdeci">border_mode</div><div class="ttdef"><b>Definition:</b> <a href="_c_l_2_convolution_8cpp_source.xhtml#l00118">Convolution.cpp:118</a></div></div>
<div class="ttc" id="structarm__compute_1_1_key_point_xhtml_a7cfd13d282af770aaa971755fa092fca"><div class="ttname"><a href="structarm__compute_1_1_key_point.xhtml#a7cfd13d282af770aaa971755fa092fca">arm_compute::KeyPoint::error</a></div><div class="ttdeci">float error</div><div class="ttdoc">Tracking error initialized to 0 by the corner detector.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00421">Types.h:421</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_xhtml_a856b55fc20ddcbdbeb84c35ae27bedac"><div class="ttname"><a href="namespacearm__compute_1_1test.xhtml#a856b55fc20ddcbdbeb84c35ae27bedac">arm_compute::test::is_in_valid_region</a></div><div class="ttdeci">bool is_in_valid_region(const ValidRegion &amp;valid_region, Coordinates coord)</div><div class="ttdoc">Check if a coordinate is within a valid region.</div><div class="ttdef"><b>Definition:</b> <a href="tests_2_utils_8h_source.xhtml#l00503">Utils.h:503</a></div></div>
<div class="ttc" id="classarm__compute_1_1_coordinates_xhtml"><div class="ttname"><a href="classarm__compute_1_1_coordinates.xhtml">arm_compute::Coordinates</a></div><div class="ttdoc">Coordinates of an item.</div><div class="ttdef"><b>Definition:</b> <a href="_coordinates_8h_source.xhtml#l00037">Coordinates.h:37</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_1_1validation_xhtml_a7819bcbbf45c2e7c1396a137dce54422"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation.xhtml#a7819bcbbf45c2e7c1396a137dce54422">arm_compute::test::validation::valid_region</a></div><div class="ttdeci">const ValidRegion valid_region</div><div class="ttdef"><b>Definition:</b> <a href="_c_l_2_absolute_difference_8cpp_source.xhtml#l00109">AbsoluteDifference.cpp:109</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_xhtml_a24d8c0391cfa38e78969b6ad97c0ff09"><div class="ttname"><a href="namespacearm__compute_1_1test.xhtml#a24d8c0391cfa38e78969b6ad97c0ff09">arm_compute::test::index2coord</a></div><div class="ttdeci">Coordinates index2coord(const TensorShape &amp;shape, int index)</div><div class="ttdoc">Convert a linear index into n-dimensional coordinates.</div><div class="ttdef"><b>Definition:</b> <a href="tests_2_utils_8h_source.xhtml#l00456">Utils.h:456</a></div></div>
<div class="ttc" id="structarm__compute_1_1_key_point_xhtml_af64066d134a77e01b3d6eb8da813627a"><div class="ttname"><a href="structarm__compute_1_1_key_point.xhtml#af64066d134a77e01b3d6eb8da813627a">arm_compute::KeyPoint::y</a></div><div class="ttdeci">int32_t y</div><div class="ttdoc">Y coordinates.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00416">Types.h:416</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_1_1validation_1_1reference_xhtml_a8fdbdfcbf8a538569a6b7cd468eca939"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a8fdbdfcbf8a538569a6b7cd468eca939">arm_compute::test::validation::reference::fast_corners</a></div><div class="ttdeci">std::vector&lt; KeyPoint &gt; fast_corners(const SimpleTensor&lt; T &gt; &amp;src, float input_thresh, bool suppress_nonmax, BorderMode border_mode, T constant_border_value)</div><div class="ttdef"><b>Definition:</b> <a href="reference_2_fast_corners_8cpp_source.xhtml#l00152">FastCorners.cpp:152</a></div></div>
<div class="ttc" id="classarm__compute_1_1test_1_1_simple_tensor_xhtml"><div class="ttname"><a href="classarm__compute_1_1test_1_1_simple_tensor.xhtml">arm_compute::test::SimpleTensor</a></div><div class="ttdoc">Simple tensor object that stores elements in a consecutive chunk of memory.</div><div class="ttdef"><b>Definition:</b> <a href="_simple_tensor_8h_source.xhtml#l00059">SimpleTensor.h:59</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_1_1validation_1_1reference_xhtml_a60e89e48713565425943913adec65294"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a60e89e48713565425943913adec65294">arm_compute::test::validation::reference::non_maxima_suppression</a></div><div class="ttdeci">SimpleTensor&lt; T &gt; non_maxima_suppression(const SimpleTensor&lt; T &gt; &amp;src, BorderMode border_mode, T constant_border_value)</div><div class="ttdef"><b>Definition:</b> <a href="_non_maxima_suppression_8cpp_source.xhtml#l00038">NonMaximaSuppression.cpp:38</a></div></div>
<div class="ttc" id="namespacearm__compute_xhtml_a15a05537a472ee742404821851529327a0db45d2a4141101bdfe48e3314cfbca3"><div class="ttname"><a href="namespacearm__compute.xhtml#a15a05537a472ee742404821851529327a0db45d2a4141101bdfe48e3314cfbca3">arm_compute::BorderMode::UNDEFINED</a></div><div class="ttdoc">Borders are left undefined.</div></div>
<div class="ttc" id="classarm__compute_1_1_dimensions_xhtml_ac4a1050be02b20b3f791b9a483f3abe2"><div class="ttname"><a href="classarm__compute_1_1_dimensions.xhtml#ac4a1050be02b20b3f791b9a483f3abe2">arm_compute::Dimensions::y</a></div><div class="ttdeci">T y() const</div><div class="ttdoc">Alias to access the size of the second dimension.</div><div class="ttdef"><b>Definition:</b> <a href="_dimensions_8h_source.xhtml#l00086">Dimensions.h:86</a></div></div>
<div class="ttc" id="structarm__compute_1_1_valid_region_xhtml"><div class="ttname"><a href="structarm__compute_1_1_valid_region.xhtml">arm_compute::ValidRegion</a></div><div class="ttdoc">Container for valid region of a window.</div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_types_8h_source.xhtml#l00184">Types.h:184</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_1_1validation_1_1reference_xhtml_a6cae310822a46019ba25a00ddb0f7e62"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation_1_1reference.xhtml#a6cae310822a46019ba25a00ddb0f7e62">arm_compute::test::validation::reference::threshold</a></div><div class="ttdeci">SimpleTensor&lt; T &gt; threshold(const SimpleTensor&lt; T &gt; &amp;src, T threshold, T false_value, T true_value, ThresholdType type, T upper)</div><div class="ttdef"><b>Definition:</b> <a href="reference_2_threshold_8cpp_source.xhtml#l00035">Threshold.cpp:35</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_xhtml_a8103df0e6c416f55f40106aa49072b42"><div class="ttname"><a href="namespacearm__compute_1_1test.xhtml#a8103df0e6c416f55f40106aa49072b42">arm_compute::test::shape_to_valid_region</a></div><div class="ttdeci">ValidRegion shape_to_valid_region(const TensorShape &amp;a_shape, bool border_undefined=false, BorderSize border_size=BorderSize(0))</div><div class="ttdoc">Create a valid region based on tensor shape, border mode and border size.</div><div class="ttdef"><b>Definition:</b> <a href="tests_2_utils_8h_source.xhtml#l00224">Utils.h:224</a></div></div>
<div class="ttc" id="_asserts_8h_xhtml"><div class="ttname"><a href="_asserts_8h.xhtml">Asserts.h</a></div></div>
<div class="ttc" id="namespacearm__compute_1_1test_1_1validation_xhtml_a989ab3e96426615bb98e04e0235088ca"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation.xhtml#a989ab3e96426615bb98e04e0235088ca">arm_compute::test::validation::src</a></div><div class="ttdeci">cast configure &amp; src</div><div class="ttdef"><b>Definition:</b> <a href="_c_l_2_cast_8cpp_source.xhtml#l00169">Cast.cpp:169</a></div></div>
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