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  1. #include <iostream>
  2. #include "opencv2\opencv.hpp"
  3.  
  4. using namespace std;
  5. using namespace cv;
  6.  
  7. int main()
  8. {
  9.     Mat a=imread("Capture.JPG",1);
  10.  
  11.     Mat b=Mat(a,Rect(0,0,30,30)).clone();
  12.     Mat c=Mat(a,Rect(50,50,30,30));
  13.  
  14.     line(b,Point(0,0),Point(30,30),Scalar(0,255,255),5);
  15.     line(c,Point(0,0),Point(30,30),Scalar(0,255,255),5);
  16.  
  17.     imshow("a",a);
  18.     imshow("b,clone",b);
  19.     imshow("c,no clone",c);
  20.     waitKey();
  21.     return 0;
  22. }
  23.  
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https://ideone.com/G4NYV
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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