Roberts

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Mat src = imread("test.png", IMREAD_GRAYSCALE);
imshow("src", src);

//X方向—Robert算子
Mat imgx;
Mat kernel_x = (Mat_<int>(2, 2) << 1, 0, 0, -1);
filter2D(src, imgx, -1, kernel_x, Point(-1, -1), 0, 0);
imshow("x方向", imgx);

Mat imgy;
//Y方向—Robert算子
Mat kernel_y = (Mat_<int>(2, 2) << 0, 1, -1, 0);
filter2D(src, imgy, -1, kernel_y, Point(-1, -1), 0, 0);
imshow("y方向", imgy);

waitKey();