That`s a video captured during a test of the Processing library: integralhistogram.
We played to PacMan, captured the game with flooding screenshots (^^), computed the integralhistogram over the screenshots to search for "eatable" monsters.
Hope you like it!
P.S: you can find the code on our homepage: inthistogram.altervista.org
and the library code at: http://bitbuket.org/giova/integralhistogram