test_param_tonemap_mode.py revision 4902d71d230d21639be817a83e8998230a6ff5e0 
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
15import its.image
16import its.device
17import its.objects
18import os
19import sys
20import numpy
21import Image
22import math
23import time
24import os.path
25
26def 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
99if __name__ == '__main__':
100    main()
101
102