Kevin D. Smith: > What I want is a two color output image: black where the image wasn't > different, and white where it was different.<
There are several ways to do that. If speed isn't essential, then you can create a third blank image of the right size, and then use the method that iterates on the pixels of an image, and assign p1 != p2 at every pixel of the third image. If speed is important you can copy the images into numpy arrays and then your operation becomes easy. Maybe there are built-in ways in PIL too, I don't know. You can also find an intermediate solution, like computing the difference image with PIL and then binarize it manually. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
