1 # Copyright 2019 The Android Open Source Project 2 # 3 # Licensed under the Apache License, Version 2.0 (the "License"); 4 # you may not use this file except in compliance with the License. 5 # You may obtain a copy of the License at 6 # 7 # http://www.apache.org/licenses/LICENSE-2.0 8 # 9 # Unless required by applicable law or agreed to in writing, software 10 # distributed under the License is distributed on an "AS IS" BASIS, 11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 # See the License for the specific language governing permissions and 13 # limitations under the License. 14 15 import os.path 16 17 import its.caps 18 import its.device 19 import its.image 20 import its.objects 21 import numpy as np 22 23 NAME = os.path.basename(__file__).split('.')[0] 24 RGB_FULL_SCALE = 255.0 25 RGB_SAT_MIN = 253.0 26 RGB_SAT_TOL = 1.0 27 28 29 def main(): 30 """Test that channels saturate evenly.""" 31 32 with its.device.ItsSession() as cam: 33 props = cam.get_camera_properties() 34 its.caps.skip_unless(its.caps.manual_sensor(props)) 35 sync_latency = its.caps.sync_latency(props) 36 37 debug = its.caps.debug_mode() 38 largest_yuv = its.objects.get_largest_yuv_format(props) 39 if debug: 40 fmt = largest_yuv 41 else: 42 match_ar = (largest_yuv['width'], largest_yuv['height']) 43 fmt = its.objects.get_smallest_yuv_format(props, match_ar=match_ar) 44 45 exp = props['android.sensor.info.exposureTimeRange'][1] 46 iso = props['android.sensor.info.sensitivityRange'][1] 47 48 # Take shot with very high ISO and exposure time. Expect saturation 49 req = its.objects.manual_capture_request(iso, exp) 50 cap = its.device.do_capture_with_latency(cam, req, sync_latency, fmt) 51 img = its.image.convert_capture_to_rgb_image(cap) 52 its.image.write_image(img, '%s.jpg' % NAME) 53 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 54 white_means = its.image.compute_image_means(tile) 55 r = white_means[0] * RGB_FULL_SCALE 56 g = white_means[1] * RGB_FULL_SCALE 57 b = white_means[2] * RGB_FULL_SCALE 58 print ' Saturated pixels r, g, b:', white_means 59 r_exp = cap['metadata']['android.sensor.exposureTime'] 60 r_iso = cap['metadata']['android.sensor.sensitivity'] 61 print ' Saturated shot write values: iso = %d, exp = %.2fms' % ( 62 iso, exp/1000000.0) 63 print ' Saturated shot read values: iso = %d, exp = %.2fms\n' % ( 64 r_iso, r_exp/1000000.0) 65 66 # assert saturation 67 assert min(r, g, b) > RGB_SAT_MIN, ( 68 'r: %.1f, g: %.1f, b: %.1f, MIN: %.f' % (r, g, b, RGB_SAT_MIN)) 69 # assert channels saturate evenly 70 assert np.isclose(min(r, g, b), max(r, g, b), atol=RGB_SAT_TOL), ( 71 'ch_sat not EQ! r: %.1f, g: %.1f, b: %.1f, TOL: %.f' % ( 72 r, g, b, RGB_SAT_TOL)) 73 74 75 if __name__ == '__main__': 76 main() 77 78
