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.caps 17 import its.device 18 import its.objects 19 import its.target 20 import os.path 21 import math 22 23 def main(): 24 """Test that the reported sizes and formats for image capture work. 25 """ 26 NAME = os.path.basename(__file__).split(".")[0] 27 28 THRESHOLD_MAX_RMS_DIFF = 0.03 29 30 with its.device.ItsSession() as cam: 31 props = cam.get_camera_properties() 32 its.caps.skip_unless(its.caps.compute_target_exposure(props) and 33 its.caps.per_frame_control(props)) 34 35 # Use a manual request with a linear tonemap so that the YUV and JPEG 36 # should look the same (once converted by the its.image module). 37 e, s = its.target.get_target_exposure_combos(cam)["midExposureTime"] 38 req = its.objects.manual_capture_request(s, e, 0.0, True, props) 39 40 rgbs = [] 41 42 for size in its.objects.get_available_output_sizes("yuv", props): 43 out_surface = {"width":size[0], "height":size[1], "format":"yuv"} 44 cap = cam.do_capture(req, out_surface) 45 assert(cap["format"] == "yuv") 46 assert(cap["width"] == size[0]) 47 assert(cap["height"] == size[1]) 48 print "Captured YUV %dx%d" % (cap["width"], cap["height"]) 49 img = its.image.convert_capture_to_rgb_image(cap) 50 its.image.write_image(img, "%s_yuv_w%d_h%d.jpg"%( 51 NAME,size[0],size[1])) 52 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 53 rgb = its.image.compute_image_means(tile) 54 rgbs.append(rgb) 55 56 for size in its.objects.get_available_output_sizes("jpg", props): 57 out_surface = {"width":size[0], "height":size[1], "format":"jpg"} 58 cap = cam.do_capture(req, out_surface) 59 assert(cap["format"] == "jpeg") 60 assert(cap["width"] == size[0]) 61 assert(cap["height"] == size[1]) 62 img = its.image.decompress_jpeg_to_rgb_image(cap["data"]) 63 its.image.write_image(img, "%s_jpg_w%d_h%d.jpg"%( 64 NAME,size[0], size[1])) 65 assert(img.shape[0] == size[1]) 66 assert(img.shape[1] == size[0]) 67 assert(img.shape[2] == 3) 68 print "Captured JPEG %dx%d" % (cap["width"], cap["height"]) 69 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 70 rgb = its.image.compute_image_means(tile) 71 rgbs.append(rgb) 72 73 max_diff = 0 74 rgb0 = rgbs[0] 75 for rgb1 in rgbs[1:]: 76 rms_diff = math.sqrt( 77 sum([pow(rgb0[i] - rgb1[i], 2.0) for i in range(3)]) / 3.0) 78 max_diff = max(max_diff, rms_diff) 79 print "Max RMS difference:", max_diff 80 assert(rms_diff < THRESHOLD_MAX_RMS_DIFF) 81 82 if __name__ == '__main__': 83 main() 84 85
