flob is a library for processing that i built around a simple flood-fill like algorithm. today version 001m comes out. a fresh build of some upgrades under test for some time. mainly luma modes to select which colors should be matched. in flob, all happens in cpu land, takes images as input, and calculates motion blobs centroids and other nice parameters. still mesmerized how i could pack a ton of gl activity with real time video tracking at ~40% cpu usage in a 2ghz macbook..
the lib is here http://s373.net/code/flob
hope you enjoy and let me know if&how it works for you