| # Copyright 2013 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import its.image |
| import its.caps |
| import its.device |
| import its.objects |
| import its.target |
| import pylab |
| import os.path |
| import matplotlib |
| import matplotlib.pyplot |
| |
| def main(): |
| """Test that the android.colorCorrection.* params are applied when set. |
| |
| Takes shots with different transform and gains values, and tests that |
| they look correspondingly different. The transform and gains are chosen |
| to make the output go redder or bluer. |
| |
| Uses a linear tonemap. |
| """ |
| NAME = os.path.basename(__file__).split(".")[0] |
| |
| THRESHOLD_MAX_DIFF = 0.1 |
| |
| with its.device.ItsSession() as cam: |
| props = cam.get_camera_properties() |
| its.caps.skip_unless(its.caps.compute_target_exposure(props) and |
| its.caps.per_frame_control(props)) |
| |
| # Baseline request |
| e, s = its.target.get_target_exposure_combos(cam)["midSensitivity"] |
| req = its.objects.manual_capture_request(s, e, 0.0, True, props) |
| req["android.colorCorrection.mode"] = 0 |
| |
| # Transforms: |
| # 1. Identity |
| # 2. Identity |
| # 3. Boost blue |
| transforms = [its.objects.int_to_rational([1,0,0, 0,1,0, 0,0,1]), |
| its.objects.int_to_rational([1,0,0, 0,1,0, 0,0,1]), |
| its.objects.int_to_rational([1,0,0, 0,1,0, 0,0,2])] |
| |
| # Gains: |
| # 1. Unit |
| # 2. Boost red |
| # 3. Unit |
| gains = [[1,1,1,1], [2,1,1,1], [1,1,1,1]] |
| |
| r_means = [] |
| g_means = [] |
| b_means = [] |
| |
| # Capture requests: |
| # 1. With unit gains, and identity transform. |
| # 2. With a higher red gain, and identity transform. |
| # 3. With unit gains, and a transform that boosts blue. |
| for i in range(len(transforms)): |
| req["android.colorCorrection.transform"] = transforms[i] |
| req["android.colorCorrection.gains"] = gains[i] |
| cap = cam.do_capture(req) |
| img = its.image.convert_capture_to_rgb_image(cap) |
| its.image.write_image(img, "%s_req=%d.jpg" % (NAME, i)) |
| tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) |
| rgb_means = its.image.compute_image_means(tile) |
| r_means.append(rgb_means[0]) |
| g_means.append(rgb_means[1]) |
| b_means.append(rgb_means[2]) |
| ratios = [rgb_means[0] / rgb_means[1], rgb_means[2] / rgb_means[1]] |
| print "Means = ", rgb_means, " Ratios =", ratios |
| |
| # Draw a plot. |
| domain = range(len(transforms)) |
| pylab.plot(domain, r_means, 'r') |
| pylab.plot(domain, g_means, 'g') |
| pylab.plot(domain, b_means, 'b') |
| pylab.ylim([0,1]) |
| matplotlib.pyplot.savefig("%s_plot_means.png" % (NAME)) |
| |
| # Expect G0 == G1 == G2, R0 == 0.5*R1 == R2, B0 == B1 == 0.5*B2 |
| # Also need to ensure that the image is not clamped to white/black. |
| assert(all(g_means[i] > 0.2 and g_means[i] < 0.8 for i in xrange(3))) |
| assert(abs(g_means[1] - g_means[0]) < THRESHOLD_MAX_DIFF) |
| assert(abs(g_means[2] - g_means[1]) < THRESHOLD_MAX_DIFF) |
| assert(abs(r_means[2] - r_means[0]) < THRESHOLD_MAX_DIFF) |
| assert(abs(r_means[1] - 2.0 * r_means[0]) < THRESHOLD_MAX_DIFF) |
| assert(abs(b_means[1] - b_means[0]) < THRESHOLD_MAX_DIFF) |
| assert(abs(b_means[2] - 2.0 * b_means[0]) < THRESHOLD_MAX_DIFF) |
| |
| if __name__ == '__main__': |
| main() |
| |