Hey,
CVTools will provide you with accurate point tracking, and provide numeric outputs in a structure. It's also slow, buggy, and requires a zillion support patches.
I saw that a couple of weeks ago and didn't worked because i'm on Snow Leopard or something, so I couldn't even try...
Apple's CI method does some fancy CI filter work, then uses Area Average (or something similar?) to condense the image-difference's motion vectors (converted to colors) into a single pixel value -- you then use the Image Pixel patch to extract its red/green/blue components, which represent the motion of the area that's been averaged. For a single point this works quite well (and requires no fancy patches), but for many points it gets very expensive and slow :/
This sounds more like I'm looking for! :-)
Hope that helps point you vaguely where you're wanting to go :)
Yes of course! :-) many thanks! WE are trying to make an installation where you have to light the wall or painting with a flashlight, so we need just the centermost point of the lighted area and use the coord to trigger music / sounds and get also some room visual feedback. I'll take a look at it :-)
Best regards, Juan G. Alzate Romero [email protected] http://rukano.de _______________________________________________ Do not post admin requests to the list. They will be ignored. Quartzcomposer-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com This email sent to [email protected]
