How does the diagonal Sobel filter work?

Question

Mathematics

Tell me how you can implement a Sobel filter in Matlab that will work not along x or y, but diagonally. Links to helpful articles would be very helpful.

Answer 1

just rotate the convolution matrix by 45 degrees

2 1 0
1 0-1
0-1-2

well, respectively, on a different diagonal

0 1 2
-1 0 1
-2-1 0