Isolating an object from saturization…

[Avrohom Kohn]

I understand from your question, that you have colored footage, and want one part of it in black & white. If that’s the case, than duplicate the layer, add the “hue/saturation” effect, than just mask out the section you want desaturated.

Hope that helped,

A.N.

[Mike Clasby]

Andrew Kramer has a tut for blemish removal, but the methods can isolate diffent color areas of the screen to apply effects to that area alone. Is that what you want?

https://forums.creativecow.net/cgi-bin/new_page_wrapper.cgi?forumid=2&page=https://www.creativecow.net/articles/kramer_andrew/blemish_removal/index.html

He uses an Adjustment Layer as a Luma Matte on a duplicate of the clip to apply effects to certain parts of the screen (colors). If your “moving and multi-colored object” is distinct from the background it will work. Don’t worry Andrew walks you through it step by step.

Note: Beware Golf Jokes. (you’ll understand when you watch the vid)

Or even simpler, maybe you want Roland R. Kahlenberg’s “Two or Three Color” Tut:

https://forums.creativecow.net/cgi-bin/new_page_wrapper.cgi?forumid=2&page=https://www.creativecow.net/articles/kahlenberg_roland/coolsville/index.html