Mat表达式

#include  
#include "opencv2/opencv.hpp" 
 
using namespace std; 
using namespace cv; 
 
int main(int argc, char* argv[])
{
    Mat A = Mat::eye(4,4,CV_32SC1);
    Mat B = A * 3 + 1;
    Mat C = B.diag(0) + B.col(1);
    cout << "A=" << A << endl << endl;
    cout << "B=" << B << endl << endl;
    cout << "C=" << C << endl << endl;
    cout << "C .*diag(B)=" << C.dot(B.diag(0)) << endl;
    
    return 0;
}