I only skimmed it, but I want to point out to the author that in his slope equation, the slope is denoted by m, not x. But yes, using the Laplacian seems natur

I only skimmed it, but I want to point out to the author that in his slope equation, the slope is denoted by m, not x. But yes, using the Laplacian seems natural as a metric for what he wants to measure. Coming from a physics background though, it felt weird being explained in terms of pixels in a picture what a laplacian is...