| # Copyright 2013 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 that the reported sizes and formats for image capture work. |
| """ |
| NAME = os.path.basename(__file__).split(".")[0] |
| |
| THRESHOLD_MAX_RMS_DIFF = 0.03 |
| |
| with its.device.ItsSession() as cam: |
| props = cam.get_camera_properties() |
| its.caps.skip_unless(its.caps.compute_target_exposure(props) and |
| its.caps.per_frame_control(props)) |
| |
| # 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) |
| |
| rgbs = [] |
| |
| for size in its.objects.get_available_output_sizes("yuv", props): |
| out_surface = {"width":size[0], "height":size[1], "format":"yuv"} |
| cap = cam.do_capture(req, out_surface) |
| assert(cap["format"] == "yuv") |
| assert(cap["width"] == size[0]) |
| assert(cap["height"] == size[1]) |
| print "Captured YUV %dx%d" % (cap["width"], cap["height"]) |
| img = its.image.convert_capture_to_rgb_image(cap) |
| its.image.write_image(img, "%s_yuv_w%d_h%d.jpg"%( |
| NAME,size[0],size[1])) |
| tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) |
| rgb = its.image.compute_image_means(tile) |
| rgbs.append(rgb) |
| |
| for size in its.objects.get_available_output_sizes("jpg", props): |
| out_surface = {"width":size[0], "height":size[1], "format":"jpg"} |
| cap = cam.do_capture(req, out_surface) |
| assert(cap["format"] == "jpeg") |
| assert(cap["width"] == size[0]) |
| assert(cap["height"] == size[1]) |
| img = its.image.decompress_jpeg_to_rgb_image(cap["data"]) |
| its.image.write_image(img, "%s_jpg_w%d_h%d.jpg"%( |
| NAME,size[0], size[1])) |
| assert(img.shape[0] == size[1]) |
| assert(img.shape[1] == size[0]) |
| assert(img.shape[2] == 3) |
| print "Captured JPEG %dx%d" % (cap["width"], cap["height"]) |
| tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) |
| rgb = its.image.compute_image_means(tile) |
| rgbs.append(rgb) |
| |
| max_diff = 0 |
| rgb0 = rgbs[0] |
| for rgb1 in rgbs[1:]: |
| rms_diff = math.sqrt( |
| sum([pow(rgb0[i] - rgb1[i], 2.0) for i in range(3)]) / 3.0) |
| max_diff = max(max_diff, rms_diff) |
| print "Max RMS difference:", max_diff |
| assert(rms_diff < THRESHOLD_MAX_RMS_DIFF) |
| |
| if __name__ == '__main__': |
| main() |
| |