# Copyright 2016 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 import its.caps import its.cv2image import its.device import its.image import its.objects import numpy as np NUM_TRYS = 2 NUM_STEPS = 6 SHARPNESS_TOL = 10 # percentage POSITION_TOL = 10 # percentage FRAME_TIME_TOL = 10 # ms VGA_WIDTH = 640 VGA_HEIGHT = 480 NAME = os.path.basename(__file__).split('.')[0] CHART_FILE = os.path.join(os.environ['CAMERA_ITS_TOP'], 'pymodules', 'its', 'test_images', 'ISO12233.png') CHART_HEIGHT = 13.5 # cm CHART_DISTANCE = 30.0 # cm CHART_SCALE_START = 0.65 CHART_SCALE_STOP = 1.35 CHART_SCALE_STEP = 0.025 def test_lens_position(cam, props, fmt, sensitivity, exp, af_fd): """Return fd, sharpness, lens state of the output images. Args: cam: An open device session. props: Properties of cam fmt: dict; capture format sensitivity: Sensitivity for the 3A request as defined in android.sensor.sensitivity exp: Exposure time for the 3A request as defined in android.sensor.exposureTime af_fd: Focus distance for the 3A request as defined in android.lens.focusDistance Returns: Dictionary of results for different focal distance captures with static lens positions and moving lens positions d_static, d_moving """ # initialize chart class chart = its.cv2image.Chart(CHART_FILE, CHART_HEIGHT, CHART_DISTANCE, CHART_SCALE_START, CHART_SCALE_STOP, CHART_SCALE_STEP) # find chart location xnorm, ynorm, wnorm, hnorm = chart.locate(cam, props, fmt, sensitivity, exp, af_fd) # initialize variables and take data sets data_static = {} data_moving = {} white_level = int(props['android.sensor.info.whiteLevel']) min_fd = props['android.lens.info.minimumFocusDistance'] hyperfocal = props['android.lens.info.hyperfocalDistance'] fds_f = np.arange(hyperfocal, min_fd, (min_fd-hyperfocal)/(NUM_STEPS-1)) fds_f = np.append(fds_f, min_fd) fds_f = fds_f.tolist() fds_b = list(reversed(fds_f)) fds_fb = list(fds_f) fds_fb.extend(fds_b) # forward and back # take static data set for i, fd in enumerate(fds_fb): req = its.objects.manual_capture_request(sensitivity, exp) req['android.lens.focusDistance'] = fd cap = its.image.stationary_lens_cap(cam, req, fmt) data = {'fd': fds_fb[i]} data['loc'] = cap['metadata']['android.lens.focusDistance'] print ' focus distance (diopters): %.3f' % data['fd'] print ' current lens location (diopters): %.3f' % data['loc'] y, _, _ = its.image.convert_capture_to_planes(cap, props) chart = its.image.normalize_img(its.image.get_image_patch(y, xnorm, ynorm, wnorm, hnorm)) its.image.write_image(chart, '%s_stat_i=%d_chart.jpg' % (NAME, i)) data['sharpness'] = white_level*its.image.compute_image_sharpness(chart) print 'Chart sharpness: %.1f\n' % data['sharpness'] data_static[i] = data # take moving data set reqs = [] for i, fd in enumerate(fds_f): reqs.append(its.objects.manual_capture_request(sensitivity, exp)) reqs[i]['android.lens.focusDistance'] = fd caps = cam.do_capture(reqs, fmt) for i, cap in enumerate(caps): data = {'fd': fds_f[i]} data['loc'] = cap['metadata']['android.lens.focusDistance'] data['lens_moving'] = (cap['metadata']['android.lens.state'] == 1) timestamp = cap['metadata']['android.sensor.timestamp'] * 1E-6 if i == 0: timestamp_init = timestamp timestamp -= timestamp_init data['timestamp'] = timestamp print ' focus distance (diopters): %.3f' % data['fd'] print ' current lens location (diopters): %.3f' % data['loc'] y, _, _ = its.image.convert_capture_to_planes(cap, props) y = its.image.flip_mirror_img_per_argv(y) chart = its.image.normalize_img(its.image.get_image_patch(y, xnorm, ynorm, wnorm, hnorm)) its.image.write_image(chart, '%s_move_i=%d_chart.jpg' % (NAME, i)) data['sharpness'] = white_level*its.image.compute_image_sharpness(chart) print 'Chart sharpness: %.1f\n' % data['sharpness'] data_moving[i] = data return data_static, data_moving def main(): """Test if focus position is properly reported for moving lenses.""" print '\nStarting test_lens_position.py' with its.device.ItsSession() as cam: props = cam.get_camera_properties() its.caps.skip_unless(not its.caps.fixed_focus(props)) its.caps.skip_unless(its.caps.lens_calibrated(props)) fmt = {'format': 'yuv', 'width': VGA_WIDTH, 'height': VGA_HEIGHT} # Get proper sensitivity, exposure time, and focus distance with 3A. s, e, _, _, fd = cam.do_3a(get_results=True) # Get sharpness for each focal distance d_stat, d_move = test_lens_position(cam, props, fmt, s, e, fd) print 'Lens stationary' for k in sorted(d_stat): print ('i: %d\tfd: %.3f\tlens location (diopters): %.3f \t' 'sharpness: %.1f' % (k, d_stat[k]['fd'], d_stat[k]['loc'], d_stat[k]['sharpness'])) print 'Lens moving' for k in sorted(d_move): print ('i: %d\tfd: %.3f\tlens location (diopters): %.3f \t' 'sharpness: %.1f \tlens_moving: %r \t' 'timestamp: %.1fms' % (k, d_move[k]['fd'], d_move[k]['loc'], d_move[k]['sharpness'], d_move[k]['lens_moving'], d_move[k]['timestamp'])) # assert static reported location/sharpness is close print 'Asserting static lens locations/sharpness are similar' for i in range(len(d_stat)/2): j = 2 * NUM_STEPS - 1 - i print (' lens position: %.3f' % d_stat[i]['fd']) assert np.isclose(d_stat[i]['loc'], d_stat[i]['fd'], rtol=POSITION_TOL/100.0) assert np.isclose(d_stat[i]['loc'], d_stat[j]['loc'], rtol=POSITION_TOL/100.0) assert np.isclose(d_stat[i]['sharpness'], d_stat[j]['sharpness'], rtol=SHARPNESS_TOL/100.0) # assert moving frames approximately consecutive with even distribution print 'Asserting moving frames are consecutive' times = [v['timestamp'] for v in d_move.itervalues()] diffs = np.gradient(times) assert np.isclose(np.amin(diffs), np.amax(diffs), atol=FRAME_TIME_TOL) # assert reported location/sharpness is correct in moving frames print 'Asserting moving lens locations/sharpness are similar' for i in range(len(d_move)): print ' lens position: %.3f' % d_stat[i]['fd'] assert np.isclose(d_stat[i]['loc'], d_move[i]['loc'], rtol=POSITION_TOL) if d_move[i]['lens_moving'] and i > 0: if d_stat[i]['sharpness'] > d_stat[i-1]['sharpness']: assert (d_stat[i]['sharpness']*(1.0+SHARPNESS_TOL) > d_move[i]['sharpness'] > d_stat[i-1]['sharpness']*(1.0-SHARPNESS_TOL)) else: assert (d_stat[i-1]['sharpness']*(1.0+SHARPNESS_TOL) > d_move[i]['sharpness'] > d_stat[i]['sharpness']*(1.0-SHARPNESS_TOL)) elif not d_move[i]['lens_moving']: assert np.isclose(d_stat[i]['sharpness'], d_move[i]['sharpness'], rtol=SHARPNESS_TOL) else: raise its.error.Error('Lens is moving at frame 0!') if __name__ == '__main__': main()