| # Copyright 2019 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 os.path |
| |
| import its.caps |
| import its.device |
| import its.image |
| import its.objects |
| import numpy as np |
| |
| NAME = os.path.basename(__file__).split('.')[0] |
| RGB_FULL_SCALE = 255.0 |
| RGB_SAT_MIN = 253.0 |
| RGB_SAT_TOL = 1.0 |
| |
| |
| def main(): |
| """Test that channels saturate evenly.""" |
| |
| with its.device.ItsSession() as cam: |
| props = cam.get_camera_properties() |
| its.caps.skip_unless(its.caps.manual_sensor(props)) |
| sync_latency = its.caps.sync_latency(props) |
| |
| debug = its.caps.debug_mode() |
| largest_yuv = its.objects.get_largest_yuv_format(props) |
| if debug: |
| fmt = largest_yuv |
| else: |
| match_ar = (largest_yuv['width'], largest_yuv['height']) |
| fmt = its.objects.get_smallest_yuv_format(props, match_ar=match_ar) |
| |
| exp = props['android.sensor.info.exposureTimeRange'][1] |
| iso = props['android.sensor.info.sensitivityRange'][1] |
| |
| # Take shot with very high ISO and exposure time. Expect saturation |
| req = its.objects.manual_capture_request(iso, exp) |
| cap = its.device.do_capture_with_latency(cam, req, sync_latency, fmt) |
| img = its.image.convert_capture_to_rgb_image(cap) |
| its.image.write_image(img, '%s.jpg' % NAME) |
| tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) |
| white_means = its.image.compute_image_means(tile) |
| r = white_means[0] * RGB_FULL_SCALE |
| g = white_means[1] * RGB_FULL_SCALE |
| b = white_means[2] * RGB_FULL_SCALE |
| print ' Saturated pixels r, g, b:', white_means |
| r_exp = cap['metadata']['android.sensor.exposureTime'] |
| r_iso = cap['metadata']['android.sensor.sensitivity'] |
| print ' Saturated shot write values: iso = %d, exp = %.2fms' % ( |
| iso, exp/1000000.0) |
| print ' Saturated shot read values: iso = %d, exp = %.2fms\n' % ( |
| r_iso, r_exp/1000000.0) |
| |
| # assert saturation |
| assert min(r, g, b) > RGB_SAT_MIN, ( |
| 'r: %.1f, g: %.1f, b: %.1f, MIN: %.f' % (r, g, b, RGB_SAT_MIN)) |
| # assert channels saturate evenly |
| assert np.isclose(min(r, g, b), max(r, g, b), atol=RGB_SAT_TOL), ( |
| 'ch_sat not EQ! r: %.1f, g: %.1f, b: %.1f, TOL: %.f' % ( |
| r, g, b, RGB_SAT_TOL)) |
| |
| |
| if __name__ == '__main__': |
| main() |
| |