How to force profile conversion in Photoshop?
How to force profile conversion in Photoshop?
- Subject: How to force profile conversion in Photoshop?
- From: Klaus Karcher <email@hidden>
- Date: Mon, 08 Dec 2003 12:08:21 +0100
- Organization: schrift & form GmbH
I'm glad that Photoshop tries to avoid unnecessary profile conversions,
but sometimes there is a need to transform a CMYK Image with the same
source and destination profile -- e.g. if the total ink limit has been
exceeded or the black generation has been affected by previous CMYK
operations.
With AppleScript it's no problem to do something like:
tell application "ColorSync Extension"
match theImage from source theProfile to destination theProfile
-- but you have to use a format colorsync can work with and lose any
layers and transparency in a layered TIF.
Up to Photoshop 5.5, it was possible to force conversion by unsing two
copys of the same profile with different internal names - but since
Photoshop 6 even this workaround won't help anymore. (the Conversion
does nothing -- it even does't say that it does nothing!)
If you take two steps -- well... you need two steps (e.g. CMYK -> Lab ->
CMYK) and if you do them in 8 bit, you suffer a loss in quality.
If you try to do it in 16 bit, you need 4 Steps:
(8bitCMYK -> 16bitCMYK -> 16bitLab -> 16bitCMYK -> 8bitCMYK) and up to
Version 7 you also lose transparency and layers (maybe not in CS?).
Any suggestions for a simpler workaround?
Thanks in advance, Klaus Karcher
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