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Photoshop Greyscale to RGB "scum dot"

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Photoshop Greyscale to RGB "scum dot"

Subject: Photoshop Greyscale to RGB "scum dot"
From: Matthew Larmour <email@hidden>
Date: Fri, 13 Jan 2006 10:27:09 -0800

I've run into a strange issue in Photoshop and am not quite sure where the problem lies.

Here's the situation:

Greyscale mode document in Photoshop, filled with white (K0%). Assign as source profile Black ink - US Web Coated Swop v2. Convert to profile, use Adobe RGB '98 as destination, Apple cmm, and relative colorimetric as intent, BPC on.

The resulting RGB values that I get are 255, 254, 253. Using Adobe ACE CMM, I get 255, 255, 255, and if I turn off BPC then I also get 255, 255, 255 if using the Apple CMM.

So my question is, why would I not get RGB 255, 255, 255 from using the Apple CMM w/ BPC, and is this likely a glitch with the CMM?

Thanks for any ideas!

Matt Larmour


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