Cycling 74 » Topic: Restrict luma/chroma key to contiguous pixels http://cycling74.com/forums/topic/restrict-lumachroma-key-to-contiguous-pixels/feed Wed, 19 Jun 2013 03:05:48 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/restrict-lumachroma-key-to-contiguous-pixels/#post-65272 <![CDATA[Restrict luma/chroma key to contiguous pixels]]> http://cycling74.com/forums/topic/restrict-lumachroma-key-to-contiguous-pixels/#post-65272 Mon, 19 Nov 2012 14:09:14 +0000 antialias I’m trying to sort how to make masks that would be restricted to contiguous areas a la photoshop’s magic wand tool. Can’t see a way to do this with standard jitter objects or cv.jit— perhaps there’s a gen solution? Feathering edges would be a bonus! Any pointers appreciated.

]]> http://cycling74.com/forums/topic/restrict-lumachroma-key-to-contiguous-pixels/#post-235252 <![CDATA[Re: Restrict luma/chroma key to contiguous pixels]]> http://cycling74.com/forums/topic/restrict-lumachroma-key-to-contiguous-pixels/#post-235252 Thu, 22 Nov 2012 21:29:16 +0000 antialias I’m wondering how this would work:

— define an arbitary submatrix
— find pixels within a luma range in the submatrix
— test to see if any of those pixels touch the border of the submatrix
— if so make the submatrix bigger
— repeat until no pixels touch the border

Seems like there must be an easier way…

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