I see - thanks for the explanation! Have you tried using Canny Edge detection rather than Sobel? It might help a bit with the noise. I've just attempted it, bu

I see - thanks for the explanation! Have you tried using Canny Edge detection rather than Sobel? It might help a bit with the noise. I've just attempted it, but can't seem to get Canny working under Mono (I've not got a windows machine at the moment).