OpenCV——重映射、仿射变换

 1 #include <opencv2/opencv.hpp>
 2 #include <iostream>
 3 #include <math.h>
 4 
 5 using namespace cv;
 6 using namespace std;
 7 
 8 
 9 int main(int argc, char** argv)
10 {
11     Mat src,dst;
12     Mat map_x, map_y;
13     src = imread("3 input.bmp");
14 
15     imshow("原图像", src);
16 
17     //创建和原图一样的效果图，x重映射图，y重映射图
18     dst.create(src.size(), src.type());
19     map_x.create(src.size(), CV_32FC1);
20     map_y.create(src.size(), CV_32FC1);
21 
22     //遍历所有像素点，改变map_x & map_y的值
23     for (int j = 0; j < src.rows; j++)
24     {
25         for (int i = 0; i < src.cols; i++)
26         {
27             map_x.at<float>(j, i) = static_cast<float>(i);
28             map_y.at<float>(j, i) = static_cast<float>(src.rows - j);
29         }
30     }
31 
32     //进行重映射操作
33     remap(src, dst, map_x, map_y, INTER_LINEAR);
34 
35     imshow("效果图", dst);
36     
37     waitKey(0);
38     return 0;
39 
40 }