# Copyright 2014 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 os.path import math def main(): """Test capturing a single frame as both YUV and JPEG outputs. """ NAME = os.path.basename(__file__).split(".")[0] THRESHOLD_MAX_RMS_DIFF = 0.01 with its.device.ItsSession() as cam: props = cam.get_camera_properties() its.caps.skip_unless(its.caps.compute_target_exposure(props)) max_jpeg_size = \ its.objects.get_available_output_sizes("jpeg", props)[0] w,h = its.objects.get_available_output_sizes( "yuv", props, (1920, 1080), max_jpeg_size)[0] fmt_yuv = {"format":"yuv", "width":w, "height":h} fmt_jpeg = {"format":"jpeg"} # Use a manual request with a linear tonemap so that the YUV and JPEG # should look the same (once converted by the its.image module). e, s = its.target.get_target_exposure_combos(cam)["midExposureTime"] req = its.objects.manual_capture_request(s, e, True, props) cap_yuv, cap_jpeg = cam.do_capture(req, [fmt_yuv, fmt_jpeg]) img = its.image.convert_capture_to_rgb_image(cap_yuv, True) its.image.write_image(img, "%s_yuv.jpg" % (NAME)) tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) rgb0 = its.image.compute_image_means(tile) img = its.image.convert_capture_to_rgb_image(cap_jpeg, True) its.image.write_image(img, "%s_jpeg.jpg" % (NAME)) tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) rgb1 = its.image.compute_image_means(tile) rms_diff = math.sqrt( sum([pow(rgb0[i] - rgb1[i], 2.0) for i in range(3)]) / 3.0) print "RMS difference:", rms_diff assert(rms_diff < THRESHOLD_MAX_RMS_DIFF) if __name__ == '__main__': main()