I dont get it..cant the matching take place efficiently with PIL, only that you need to have a condition i.e if the mismatch exceeds a certain threshold, they are not similar,
http://gumuz.looze.net/wordpress/index.php/archives/2005/06/06/python-webcam-fun-motion-detection/ Check the above link, only diiference is that instead of files as in ur case, the code here compares two pixels of consecutive frames for changes.. Sudharshan S -- http://mail.python.org/mailman/listinfo/python-list