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int main () { Mat A = Mat::ones(100, 100, CV_8U)*3; cout << A.at<int>(0,0) << endl; return 0; }
输出是一个非常大的数字 :: 50529027
谁能帮我吗??C++ 代码
you're casting to the wrong type in A.at<int>() // should be uchar instead of int so, A.at<int>(0,0) sees 0x03030303, which is, in fact 50529027. Mat A = Mat::ones(100, 100, CV_8U)*3; cout << int(A.at<uchar>(0,0)) << endl;
( A.at() 周围的演员只是用 cout 而不是 char 显示一个数字)