1 /*M///////////////////////////////////////////////////////////////////////////////////////
2 //
3 // IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
4 //
5 // By downloading, copying, installing or using the software you agree to this license.
6 // If you do not agree to this license, do not download, install,
7 // copy or use the software.
8 //
9 //
10 // License Agreement
11 // For Open Source Computer Vision Library
12 //
13 // Copyright (C) 2013, OpenCV Foundation, all rights reserved.
14 // Third party copyrights are property of their respective owners.
15 //
16 // Redistribution and use in source and binary forms, with or without modification,
17 // are permitted provided that the following conditions are met:
18 //
19 // * Redistribution's of source code must retain the above copyright notice,
20 // this list of conditions and the following disclaimer.
21 //
22 // * Redistribution's in binary form must reproduce the above copyright notice,
23 // this list of conditions and the following disclaimer in the documentation
24 // and/or other materials provided with the distribution.
25 //
26 // * The name of the copyright holders may not be used to endorse or promote products
27 // derived from this software without specific prior written permission.
28 //
29 // This software is provided by the copyright holders and contributors "as is" and
30 // any express or implied warranties, including, but not limited to, the implied
31 // warranties of merchantability and fitness for a particular purpose are disclaimed.
32 // In no event shall the Intel Corporation or contributors be liable for any direct,
33 // indirect, incidental, special, exemplary, or consequential damages
34 // (including, but not limited to, procurement of substitute goods or services;
35 // loss of use, data, or profits; or business interruption) however caused
36 // and on any theory of liability, whether in contract, strict liability,
37 // or tort (including negligence or otherwise) arising in any way out of
38 // the use of this software, even if advised of the possibility of such damage.
39 //
40 //M*/
41
42 #include "precomp.hpp"
43 #include "opencv2/photo.hpp"
44 #include "hdr_common.hpp"
45
46 namespace cv
47 {
48
checkImageDimensions(const std::vector<Mat> & images)49 void checkImageDimensions(const std::vector<Mat>& images)
50 {
51 CV_Assert(!images.empty());
52 int width = images[0].cols;
53 int height = images[0].rows;
54 int type = images[0].type();
55
56 for(size_t i = 0; i < images.size(); i++) {
57 CV_Assert(images[i].cols == width && images[i].rows == height);
58 CV_Assert(images[i].type() == type);
59 }
60 }
61
tringleWeights()62 Mat tringleWeights()
63 {
64 Mat w(LDR_SIZE, 1, CV_32F);
65 int half = LDR_SIZE / 2;
66 for(int i = 0; i < LDR_SIZE; i++) {
67 w.at<float>(i) = i < half ? i + 1.0f : LDR_SIZE - i;
68 }
69 return w;
70 }
71
RobertsonWeights()72 Mat RobertsonWeights()
73 {
74 Mat weight(LDR_SIZE, 1, CV_32FC3);
75 float q = (LDR_SIZE - 1) / 4.0f;
76 for(int i = 0; i < LDR_SIZE; i++) {
77 float value = i / q - 2.0f;
78 value = exp(-value * value);
79 weight.at<Vec3f>(i) = Vec3f::all(value);
80 }
81 return weight;
82 }
83
mapLuminance(Mat src,Mat dst,Mat lum,Mat new_lum,float saturation)84 void mapLuminance(Mat src, Mat dst, Mat lum, Mat new_lum, float saturation)
85 {
86 std::vector<Mat> channels(3);
87 split(src, channels);
88 for(int i = 0; i < 3; i++) {
89 channels[i] = channels[i].mul(1.0f / lum);
90 pow(channels[i], saturation, channels[i]);
91 channels[i] = channels[i].mul(new_lum);
92 }
93 merge(channels, dst);
94 }
95
linearResponse(int channels)96 Mat linearResponse(int channels)
97 {
98 Mat response = Mat(LDR_SIZE, 1, CV_MAKETYPE(CV_32F, channels));
99 for(int i = 0; i < LDR_SIZE; i++) {
100 response.at<Vec3f>(i) = Vec3f::all(static_cast<float>(i));
101 }
102 return response;
103 }
104
105 }
106