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 15 import its.image 16 import its.device 17 import its.objects 18 import os.path 19 import Image 20 import shutil 21 import numpy 22 import math 23 import copy 24 25 def main(): 26 """Test that converted YUV images and device JPEG images look the same. 27 """ 28 NAME = os.path.basename(__file__).split(".")[0] 29 30 THRESHOLD_MAX_RMS_DIFF = 0.1 31 32 with its.device.ItsSession() as cam: 33 props = cam.get_camera_properties() 34 35 # YUV 36 req = its.objects.manual_capture_request(100,100) 37 size = props['android.scaler.availableProcessedSizes'][0] 38 out_surface = copy.deepcopy(size) 39 out_surface["format"] = "yuv" 40 fname, w, h, cap_md = cam.do_capture(req, out_surface) 41 img = its.image.load_yuv420_to_rgb_image(fname, w, h) 42 its.image.write_image(img, "%s_fmt=yuv.jpg" % (NAME)) 43 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 44 rgb0 = its.image.compute_image_means(tile) 45 46 # JPEG 47 req = its.objects.manual_capture_request(100,100) 48 size = props['android.scaler.availableJpegSizes'][0] 49 out_surface = copy.deepcopy(size) 50 out_surface["format"] = "jpg" 51 fname, w, h, cap_md = cam.do_capture(req, out_surface) 52 img = numpy.array(Image.open(fname)).reshape(w,h,3) / 255.0 53 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 54 rgb1 = its.image.compute_image_means(tile) 55 shutil.copy2(fname, "%s_fmt=jpg.jpg" % (NAME)) 56 57 rms_diff = math.sqrt( 58 sum([pow(rgb0[i] - rgb1[i], 2.0) for i in range(3)]) / 3.0) 59 print "RMS difference:", rms_diff 60 assert(rms_diff < THRESHOLD_MAX_RMS_DIFF) 61 62 if __name__ == '__main__': 63 main() 64 65
