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 21 import os.path 22 23 def main(): 24 """Test that the android.tonemap.mode param is applied. 25 26 Applies different tonemap curves to each R,G,B channel, and checks 27 that the output images are modified as expected. 28 """ 29 NAME = os.path.basename(__file__).split(".")[0] 30 31 THRESHOLD_RATIO_MIN_DIFF = 0.1 32 THRESHOLD_DIFF_MAX_DIFF = 0.05 33 34 # The HAL3.2 spec requires that curves up to 64 control points in length 35 # must be supported. 36 L = 32 37 LM1 = float(L-1) 38 39 with its.device.ItsSession() as cam: 40 props = cam.get_camera_properties() 41 its.caps.skip_unless(its.caps.compute_target_exposure(props) and 42 its.caps.per_frame_control(props)) 43 44 e, s = its.target.get_target_exposure_combos(cam)["midExposureTime"] 45 e /= 2 46 47 # Test 1: that the tonemap curves have the expected effect. Take two 48 # shots, with n in [0,1], where each has a linear tonemap, with the 49 # n=1 shot having a steeper gradient. The gradient for each R,G,B 50 # channel increases (i.e.) R[n=1] should be brighter than R[n=0], 51 # and G[n=1] should be brighter than G[n=0] by a larger margin, etc. 52 rgb_means = [] 53 54 for n in [0,1]: 55 req = its.objects.manual_capture_request(s,e) 56 req["android.tonemap.mode"] = 0 57 req["android.tonemap.curveRed"] = ( 58 sum([[i/LM1, min(1.0,(1+0.5*n)*i/LM1)] for i in range(L)], [])) 59 req["android.tonemap.curveGreen"] = ( 60 sum([[i/LM1, min(1.0,(1+1.0*n)*i/LM1)] for i in range(L)], [])) 61 req["android.tonemap.curveBlue"] = ( 62 sum([[i/LM1, min(1.0,(1+1.5*n)*i/LM1)] for i in range(L)], [])) 63 cap = cam.do_capture(req) 64 img = its.image.convert_capture_to_rgb_image(cap) 65 its.image.write_image( 66 img, "%s_n=%d.jpg" %(NAME, n)) 67 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 68 rgb_means.append(its.image.compute_image_means(tile)) 69 70 rgb_ratios = [rgb_means[1][i] / rgb_means[0][i] for i in xrange(3)] 71 print "Test 1: RGB ratios:", rgb_ratios 72 assert(rgb_ratios[0] + THRESHOLD_RATIO_MIN_DIFF < rgb_ratios[1]) 73 assert(rgb_ratios[1] + THRESHOLD_RATIO_MIN_DIFF < rgb_ratios[2]) 74 75 76 # Test 2: that the length of the tonemap curve (i.e. number of control 77 # points) doesn't affect the output. 78 rgb_means = [] 79 80 for size in [32,64]: 81 m = float(size-1) 82 curve = sum([[i/m, i/m] for i in range(size)], []) 83 req = its.objects.manual_capture_request(s,e) 84 req["android.tonemap.mode"] = 0 85 req["android.tonemap.curveRed"] = curve 86 req["android.tonemap.curveGreen"] = curve 87 req["android.tonemap.curveBlue"] = curve 88 cap = cam.do_capture(req) 89 img = its.image.convert_capture_to_rgb_image(cap) 90 its.image.write_image( 91 img, "%s_size=%02d.jpg" %(NAME, size)) 92 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 93 rgb_means.append(its.image.compute_image_means(tile)) 94 95 rgb_diffs = [rgb_means[1][i] - rgb_means[0][i] for i in xrange(3)] 96 print "Test 2: RGB diffs:", rgb_diffs 97 assert(abs(rgb_diffs[0]) < THRESHOLD_DIFF_MAX_DIFF) 98 assert(abs(rgb_diffs[1]) < THRESHOLD_DIFF_MAX_DIFF) 99 assert(abs(rgb_diffs[2]) < THRESHOLD_DIFF_MAX_DIFF) 100 101 if __name__ == '__main__': 102 main() 103 104
