I second the idea with cam. GEM can do blobanalysis but if you a programmer I recommend to have a look at OpenCV library which can, amoung other things, do multiblob analysis. Its the base for Eyesweb software which is unfortunately Windows only. I use OpenCV in several interactive projects, but so far more for installations. Cheers, Malte -- ------------- Malte Steiner http://www.block4.com media art + development _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user