1# Copyright 2013 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"""Verifies android.sensor.exposureTime parameter.""" 15 16 17import logging 18import os.path 19import matplotlib 20from matplotlib import pylab 21from mobly import test_runner 22 23import its_base_test 24import camera_properties_utils 25import capture_request_utils 26import image_processing_utils 27import its_session_utils 28import target_exposure_utils 29 30COLORS = ['R', 'G', 'B'] 31EXP_MULT_FACTORS = [0.8, 0.9, 1.0, 1.1, 1.2] # vary exposure +/- 20% 32NAME = os.path.splitext(os.path.basename(__file__))[0] 33PATCH_H = 0.1 # center 10% 34PATCH_W = 0.1 35PATCH_X = 0.5 - PATCH_W/2 36PATCH_Y = 0.5 - PATCH_H/2 37 38 39class ParamExposureTimeTest(its_base_test.ItsBaseTest): 40 """Test that the android.sensor.exposureTime parameter is applied.""" 41 42 def test_param_exposure_time(self): 43 logging.debug('Starting %s', NAME) 44 exp_times = [] 45 r_means = [] 46 g_means = [] 47 b_means = [] 48 with its_session_utils.ItsSession( 49 device_id=self.dut.serial, 50 camera_id=self.camera_id, 51 hidden_physical_id=self.hidden_physical_id) as cam: 52 props = cam.get_camera_properties() 53 props = cam.override_with_hidden_physical_camera_props(props) 54 log_path = self.log_path 55 56 # check SKIP conditions 57 camera_properties_utils.skip_unless( 58 camera_properties_utils.compute_target_exposure(props)) 59 60 # Load chart for scene 61 its_session_utils.load_scene( 62 cam, props, self.scene, self.tablet, self.chart_distance) 63 64 # Create requests 65 sync_latency = camera_properties_utils.sync_latency(props) 66 largest_yuv = capture_request_utils.get_largest_yuv_format(props) 67 match_ar = (largest_yuv['width'], largest_yuv['height']) 68 fmt = capture_request_utils.get_smallest_yuv_format( 69 props, match_ar=match_ar) 70 e, s = target_exposure_utils.get_target_exposure_combos( 71 log_path, cam)['midExposureTime'] 72 73 # Do captures & process images 74 for i, e_mult in enumerate(EXP_MULT_FACTORS): 75 req = capture_request_utils.manual_capture_request( 76 s, e * e_mult, 0.0, True, props) 77 cap = its_session_utils.do_capture_with_latency( 78 cam, req, sync_latency, fmt) 79 img = image_processing_utils.convert_capture_to_rgb_image(cap) 80 image_processing_utils.write_image( 81 img, '%s_frame%d.jpg' % (os.path.join(log_path, NAME), i)) 82 patch = image_processing_utils.get_image_patch( 83 img, PATCH_X, PATCH_Y, PATCH_W, PATCH_H) 84 rgb_means = image_processing_utils.compute_image_means(patch) 85 exp_times.append(e * e_mult) 86 r_means.append(rgb_means[0]) 87 g_means.append(rgb_means[1]) 88 b_means.append(rgb_means[2]) 89 90 # Draw plot 91 pylab.figure(NAME) 92 for ch, means in enumerate([r_means, g_means, b_means]): 93 pylab.plot(exp_times, means, '-'+'rgb'[ch]+'o') 94 pylab.ylim([0, 1]) 95 pylab.title(NAME) 96 pylab.xlabel('Exposure times (ns)') 97 pylab.ylabel('RGB means') 98 plot_name = '%s_plot_means.png' % os.path.join(log_path, NAME) 99 matplotlib.pyplot.savefig(plot_name) 100 101 # Assert each shot is brighter than previous. 102 for ch, means in enumerate([r_means, g_means, b_means]): 103 for i in range(len(EXP_MULT_FACTORS)-1): 104 e_msg = '%s [i+1]: %.4f, [i]: %.4f' % (COLORS[ch], means[i+1], means[i]) 105 assert means[i+1] > means[i], e_msg 106 107if __name__ == '__main__': 108 test_runner.main() 109 110