Canny edge detection uses Sobel in most cases as a first or second step (after blurring) and adds a non-maximum suppression + hysteresis thresholding - You do m

Canny edge detection uses Sobel in most cases as a first or second step (after blurring) and adds a non-maximum suppression + hysteresis thresholding - You do most probably know that, just wanted to clarify that it's not really "instead".