On Fri, Dec 30, 2011 at 7:06 AM, nlko <email@example.com> wrote:
> I want to follow a horizontal movement of a black object on white > background in an AVI.
It just so happens that I need to solve a similar question. Here's a very short clip of a flying saucer from The Day the Earth Stood Still.
movie = Import["http://facstaff.unca.edu/mcmcclur/Saucer.mov", "GraphicsList"]; ListAnimate[Image /@ movie]
We can find the location of the ship using Binarize. In this case, we've got to block out the bottom since the white building has a color similar to the ship. This is accomplished using ImageMultiply with a black bottomed image.