OpenCV——PS 图层混合算法（一）

具体的算法原理可以参考

PS图层混合算法之一（不透明度，正片叠底，颜色加深，颜色减淡）

// 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 Transparent(Mat& src1, Mat& src2, Mat& dst, double alpha);

void Multiply(Mat& src1, Mat& src2, Mat& dst);

void Color_Burn(Mat& src1, Mat& src2, Mat& dst);

void Color_Dodge(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);

//double alpha=0.25;

//Transparent(Image_up, Image_down, Image_mix, alpha);

//Multiply(Image_up, Image_down, Image_mix);

//Color_Burn(Image_up, Image_down, Image_mix);

//Color_Dodge(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;

}

// Transparent 不透明度

void Transparent(Mat& src1, Mat& src2, Mat& dst, double alpha)

{

dst=alpha*src1+(1-alpha)*src2;

}

// Multiply 正片叠底

void Multiply(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]=

src1.at<Vec3f>(index_row, index_col)[index_c]*

src2.at<Vec3f>(index_row, index_col)[index_c];

}

}

}

// Color_Burn 颜色加深

void Color_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]=1-

(1-src1.at<Vec3f>(index_row, index_col)[index_c])/

src2.at<Vec3f>(index_row, index_col)[index_c];

}

}

}

// Color_Dodge 颜色减淡

void Color_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]=

src2.at<Vec3f>(index_row, index_col)[index_c]/

(1-src1.at<Vec3f>(index_row, index_col)[index_c]);

}

}

}