1# Copyright 2014 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 15import its.image 16import its.caps 17import its.device 18import its.objects 19import its.target 20import os.path 21import math 22 23def main(): 24 """Test capturing a single frame as both RAW10 and YUV outputs. 25 """ 26 NAME = os.path.basename(__file__).split(".")[0] 27 28 THRESHOLD_MAX_RMS_DIFF = 0.02 29 30 with its.device.ItsSession() as cam: 31 props = cam.get_camera_properties() 32 33 if (not its.caps.compute_target_exposure(props) or 34 not its.caps.raw10(props)): 35 print "Test skipped" 36 return 37 38 # Use a manual request with a linear tonemap so that the YUV and RAW 39 # should look the same (once converted by the its.image module). 40 e, s = its.target.get_target_exposure_combos(cam)["midExposureTime"] 41 req = its.objects.manual_capture_request(s, e, True) 42 43 cap_raw, cap_yuv = cam.do_capture(req, 44 [{"format":"raw10"}, {"format":"yuv"}]) 45 46 img = its.image.convert_capture_to_rgb_image(cap_yuv) 47 its.image.write_image(img, "%s_yuv.jpg" % (NAME), True) 48 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 49 rgb0 = its.image.compute_image_means(tile) 50 51 # Raw shots are 1/2 x 1/2 smaller after conversion to RGB, so scale the 52 # tile appropriately. 53 img = its.image.convert_capture_to_rgb_image(cap_raw, props=props) 54 its.image.write_image(img, "%s_raw.jpg" % (NAME), True) 55 tile = its.image.get_image_patch(img, 0.475, 0.475, 0.05, 0.05) 56 rgb1 = its.image.compute_image_means(tile) 57 58 rms_diff = math.sqrt( 59 sum([pow(rgb0[i] - rgb1[i], 2.0) for i in range(3)]) / 3.0) 60 print "RMS difference:", rms_diff 61 assert(rms_diff < THRESHOLD_MAX_RMS_DIFF) 62 63if __name__ == '__main__': 64 main() 65 66