[PD] color tracking in Gem/Pd-extended?

marius schebella marius.schebella at gmail.com
Sat Feb 21 07:52:17 CET 2009

did you have a look at pix_alpha?

John Harrison wrote:
> Wondering the best solution for color tracking in Pd-extended. I'd like 
> my solution to be cross-platform so that rules out PDP and friends.
> All I've come up with is to use [pix_blob] to track the color, and to 
> try to minimize the tracking color in the background. There's probably a 
> Gem object where I can "gate" a color i.e. eliminate a color from a 
> pixel if it is less than a certain amount. In my rendering chain after 
> my webcam I'd gate the color I am trying to track, then use [pix_blob] 
> with a color weight of entirely the tracking color.
> Is there a better way?
> -John
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