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 19 import sys 20 import numpy 21 import Image 22 import math 23 import time 24 import os.path 25 26 def main(): 27 """Test that the android.tonemap.mode param is applied. 28 29 Applies different tonemap curves to each R,G,B channel, and checks 30 that the output images are modified as expected. 31 """ 32 NAME = os.path.basename(__file__).split(".")[0] 33 34 THRESHOLD_RATIO_MIN_DIFF = 0.1 35 THRESHOLD_DIFF_MAX_DIFF = 0.05 36 37 # TODO: Query the allowable tonemap curve sizes; here, it's hardcoded to 38 # a length=64 list of tuples. The max allowed length should be inside the 39 # camera properties object. 40 L = 32 41 LM1 = float(L-1) 42 43 with its.device.ItsSession() as cam: 44 45 # Test 1: that the tonemap curves have the expected effect. Take two 46 # shots, with n in [0,1], where each has a linear tonemap, with the 47 # n=1 shot having a steeper gradient. The gradient for each R,G,B 48 # channel increases (i.e.) R[n=1] should be brighter than R[n=0], 49 # and G[n=1] should be brighter than G[n=0] by a larger margin, etc. 50 rgb_means = [] 51 52 for n in [0,1]: 53 req = its.objects.manual_capture_request(100,50) 54 req["android.tonemap.mode"] = 0 55 req["android.tonemap.curveRed"] = ( 56 sum([[i/LM1, (1+0.5*n)*i/LM1] for i in range(L)], [])) 57 req["android.tonemap.curveGreen"] = ( 58 sum([[i/LM1, (1+1.0*n)*i/LM1] for i in range(L)], [])) 59 req["android.tonemap.curveBlue"] = ( 60 sum([[i/LM1, (1+1.5*n)*i/LM1] for i in range(L)], [])) 61 fname, w, h, md = cam.do_capture(req) 62 img = its.image.load_yuv420_to_rgb_image(fname, w, h) 63 its.image.write_image( 64 img, "%s_n=%d.jpg" %(NAME, n)) 65 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 66 rgb_means.append(its.image.compute_image_means(tile)) 67 68 rgb_ratios = [rgb_means[1][i] / rgb_means[0][i] for i in xrange(3)] 69 print "Test 1: RGB ratios:", rgb_ratios 70 assert(rgb_ratios[0] + THRESHOLD_RATIO_MIN_DIFF < rgb_ratios[1]) 71 assert(rgb_ratios[1] + THRESHOLD_RATIO_MIN_DIFF < rgb_ratios[2]) 72 73 74 # Test 2: that the length of the tonemap curve (i.e. number of control 75 # points) doesn't affect the output. 76 rgb_means = [] 77 78 for size in [32,64]: 79 m = float(size-1) 80 curve = sum([[i/m, i/m] for i in range(size)], []) 81 req = its.objects.manual_capture_request(100,50) 82 req["android.tonemap.mode"] = 0 83 req["android.tonemap.curveRed"] = curve 84 req["android.tonemap.curveGreen"] = curve 85 req["android.tonemap.curveBlue"] = curve 86 fname, w, h, md = cam.do_capture(req) 87 img = its.image.load_yuv420_to_rgb_image(fname, w, h) 88 its.image.write_image( 89 img, "%s_size=%02d.jpg" %(NAME, size)) 90 tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1) 91 rgb_means.append(its.image.compute_image_means(tile)) 92 93 rgb_diffs = [rgb_means[1][i] - rgb_means[0][i] for i in xrange(3)] 94 print "Test 2: RGB diffs:", rgb_diffs 95 assert(abs(rgb_diffs[0]) < THRESHOLD_DIFF_MAX_DIFF) 96 assert(abs(rgb_diffs[1]) < THRESHOLD_DIFF_MAX_DIFF) 97 assert(abs(rgb_diffs[2]) < THRESHOLD_DIFF_MAX_DIFF) 98 99 if __name__ == '__main__': 100 main() 101 102
