参考来源：
// define head function
#ifndef PS_ALGORITHM_H_INCLUDED
#define PS_ALGORITHM_H_INCLUDED
#include
#include
#include "cv.h"
#include "highgui.h"
#include "cxmat.hpp"
#include "cxcore.hpp"
#include "math.h"
using namespace std;
using namespace cv;
void Show_Image(Mat&, const string &);
#endif // PS_ALGORITHM_H_INCLUDED
/*
This program will generate
color gradient mapping
*/
#include "PS_Algorithm.h"
#include
using namespace std;
using namespace cv;
int main(void)
{
Mat Img(600, 800, CV_32FC3);
Scalar a(255.0, 255.0, 255.0);
Scalar b(0.0, 0.0, 0.0);
Img.setTo(a);
int width, height;
width=Img.cols;
height=Img.rows;
Point2f origin(0.0, 0.0);
Point2f Cen(Img.cols/2.0, Img.rows/2.0);
float dis;
if (origin.x<=Cen.x && origin.y<=Cen.y)
{
dis=sqrt((width-1-origin.x)*(width-1-origin.x)+
(height-1-origin.y)*(height-1-origin.y));
}
else if (origin.x<=Cen.x && origin.y>Cen.y)
{
dis=sqrt((width-1-origin.x)*(width-1-origin.x)+
origin.y*origin.y);
}
else if (origin.x>Cen.x && origin.y>Cen.y)
{
dis=sqrt(origin.x*origin.x+(origin.y)*(origin.y));
}
else
{
dis=sqrt(origin.x*origin.x+
(height-1-origin.y)*(height-1-origin.y));
}
float weightB=(b[0]-a[0])/dis;
float weightG=(b[1]-a[1])/dis;
float weightR=(b[2]-a[2])/dis;
float dis2;
for (int i=0; i
{
for (int j=0; j
{
dis2=sqrt((i-origin.x)*(i-origin.x)+(j-origin.y)*(j-origin.y));
Img.at(i,j)[0]=Img.at(i,j)[0]+weightB*dis2;
Img.at(i,j)[1]=Img.at(i,j)[1]+weightG*dis2;
Img.at(i,j)[2]=Img.at(i,j)[2]+weightR*dis2;
}
}
Img=Img/255.0;
Show_Image(Img, "img");
imwrite("Out.jpg", Img*255);
waitKey();
cout<
}
// define the show image
#include "PS_Algorithm.h"
#include
#include
using namespace std;
using namespace cv;
void Show_Image(Mat& Image, const string& str)
{
namedWindow(str.c_str(),CV_WINDOW_AUTOSIZE);
imshow(str.c_str(), Image);
}
