Gradients from 2D images are easy. The surprise was that this was the only transform needed to get the information content. Dynamic programming over a 2D array

Gradients from 2D images are easy. The surprise was that this was the only transform needed to get the information content. Dynamic programming over a 2D array is a pretty standard optimization -- here used to find the seams. Extracting a seam is trivial. The hard part for me would be doing this in JavaScript to make it a nice addition to page layout, and that's only because I haven't learned enough yet. I suppose he might have a patent. I hate the patent system.