On Feb 26, 10:16 pm, "iceman" <savva... at gmail.com> wrote: > a)Yes, I am using PIL. > b)The color of each pixel over a sequence of frames I think PIL has it for 2 images, you may have to build a binary tree of merged images: http://www.pythonware.com/library/pil/handbook/image.htm#blend Bye, bearophile