RE: Luminosity channel...
RE: Luminosity channel...
- Subject: RE: Luminosity channel...
- From: "shAf" <email@hidden>
- Date: Mon, 24 Sep 2001 13:51:35 -0230
Bruce writes ...
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At 9:53 AM -0400 9/24/01, CS Carl Stawicki (4211) wrote:
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>Hey kids-
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>
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>Does anyone know how PhotoShop calculates the luminosity channel? ...
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It's the L* (Lightness in Photoshop terminology) channel that you'd
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get if you converted the image from whatever space it's in to Lab.
The "math" I wanted to remember and reply with was something akin to the
percentages used if creating a grayscale with the channel mixer. Isn't it
something like R=30, G=50, B=20(???)
shAf :o)