OpenCV——重映射、仿射变换

 #include <opencv2/opencv.hpp>
 #include <iostream>
 #include <math.h>

 using namespace cv;
 using namespace std;

 int main(int argc, char** argv)
 {
     Mat src,dst;
     Mat map_x, map_y;
     src = imread("3 input.bmp");

     imshow("原图像", src);

     //创建和原图一样的效果图，x重映射图，y重映射图
     dst.create(src.size(), src.type());
     map_x.create(src.size(), CV_32FC1);
     map_y.create(src.size(), CV_32FC1);

     //遍历所有像素点，改变map_x & map_y的值
     for (int j = ; j < src.rows; j++)
     {
         for (int i = ; i < src.cols; i++)
         {
             map_x.at<float>(j, i) = static_cast<float>(i);
             map_y.at<float>(j, i) = static_cast<float>(src.rows - j);
         }
     }

     //进行重映射操作
     remap(src, dst, map_x, map_y, INTER_LINEAR);

     imshow("效果图", dst);

     waitKey();
     return ;

 }