具体的算法原理可以参考
PS图层混合算法之二（线性加深，线性减淡，变亮，变暗）
// PS_Algorithm.h
#ifndef PS_ALGORITHM_H_INCLUDED
#define PS_ALGORITHM_H_INCLUDED
#include <iostream>
#include <string>
#include "cv.h"
#include "highgui.h"
#include "cxmat.hpp"
#include "cxcore.hpp"
using namespace std;
using namespace cv;
#endif // PS_ALGORITHM_H_INCLUDED
// main function
#include "PS_Algorithm.h"
void Linear_Burn(Mat& src1, Mat& src2, Mat& dst);
void Linear_Dodge(Mat& src1, Mat& src2, Mat& dst);
void Lighten(Mat& src1, Mat& src2, Mat& dst);
void Darken(Mat& src1, Mat& src2, Mat& dst);
int main(void)
{
Mat Origin_Image1;
Mat Origin_Image2;
Origin_Image1=imread("2.jpg");
Origin_Image2=imread("3.jpg");
Mat Image_up(Origin_Image1.size(),CV_32FC3);
Mat Image_down(Origin_Image2.size(), CV_32FC3);
Origin_Image1.convertTo(Image_up,CV_32FC3);
Origin_Image2.convertTo(Image_down,CV_32FC3);
Image_up=Image_up/255;
Image_down=Image_down/255;
Mat Image_mix(Image_up);
//Linear_Burn(Image_up, Image_down, Image_mix);
//Linear_Dodge(Image_up, Image_down, Image_mix);
//Lighten(Image_up, Image_down, Image_mix);
//Darken(Image_up, Image_down, Image_mix);
namedWindow("Img", CV_WINDOW_AUTOSIZE);
imshow("Img",Image_mix);
waitKey();
cvDestroyWindow("Img");
cout<<"All is well."<<endl;
return 0;
}
// linear Burn
void Linear_Burn(Mat& src1, Mat& src2, Mat& dst)
{
for(int index_row=0; index_row<src1.rows; index_row++)
{
for(int index_col=0; index_col<src1.cols; index_col++)
{
for(int index_c=0; index_c<3; index_c++)
dst.at<Vec3f>(index_row, index_col)[index_c]=max(
src1.at<Vec3f>(index_row, index_col)[index_c]+
src2.at<Vec3f>(index_row, index_col)[index_c]-1, (float)0.0);
}
}
}
// linear dodge
void Linear_Dodge(Mat& src1, Mat& src2, Mat& dst)
{
for(int index_row=0; index_row<src1.rows; index_row++)
{
for(int index_col=0; index_col<src1.cols; index_col++)
{
for(int index_c=0; index_c<3; index_c++)
dst.at<Vec3f>(index_row, index_col)[index_c]=min(
src1.at<Vec3f>(index_row, index_col)[index_c]+
src2.at<Vec3f>(index_row, index_col)[index_c], (float)1.0);
}
}
}
// Lighten
void Lighten(Mat& src1, Mat& src2, Mat& dst)
{
for(int index_row=0; index_row<src1.rows; index_row++)
{
for(int index_col=0; index_col<src1.cols; index_col++)
{
for(int index_c=0; index_c<3; index_c++)
dst.at<Vec3f>(index_row, index_col)[index_c]=max(
src1.at<Vec3f>(index_row, index_col)[index_c],
src2.at<Vec3f>(index_row, index_col)[index_c]);
}
}
}
// Darken
void Darken(Mat& src1, Mat& src2, Mat& dst)
{
for(int index_row=0; index_row<src1.rows; index_row++)
{
for(int index_col=0; index_col<src1.cols; index_col++)
{
for(int index_c=0; index_c<3; index_c++)
dst.at<Vec3f>(index_row, index_col)[index_c]=min(
src1.at<Vec3f>(index_row, index_col)[index_c],
src2.at<Vec3f>(index_row, index_col)[index_c]);
}
}
Opencv——PS 图层混合算法 （二）,布布扣,bubuko.com
Opencv——PS 图层混合算法 （二）
原文：http://blog.csdn.net/matrix_space/article/details/37760609
