RE: ScannerRGB to WorkingSpaceRGB (rendering intents)
RE: ScannerRGB to WorkingSpaceRGB (rendering intents)
- Subject: RE: ScannerRGB to WorkingSpaceRGB (rendering intents)
- From: Roger Breton <email@hidden>
- Date: Wed, 11 Jul 2001 08:20:47 -0400
>
Terry wrote:
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>
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> I simply don't find perceptual rendering working for the majority of
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> images that I've come across. The thing that irks me most about
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> perceptual is that it performs gamut compression REGARDLESS of whether
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> the image has out of gamut colors or not.
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I absolutely agree. I experienced rendering relative colorimetric with BPC
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gives best results when Offset printing is about high quality, which means
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i.e. the ability of high density-printing by modern equipment and ctp
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tending to results in lower dot gain. So, if such a process is carefully
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profiled, the relativeness of L can be handled like in the perceptual
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intent. I noticed modern programs are powerful in creating colorimetric
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intents preserving and giving excellent shadow details (in combination with
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BPC), so the eye with its ability to adapt to black and white has to look
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exactly and carefully to recognize differences compared to a large gamut
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reference-proof.
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Andre, what is your "Source" profile when you concert colorimetrically with
PBC On in Photoshop? And are you using ACE Engine?
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It would be fine to chose this rendering priority in
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standard-ICC-architecture (not always convert-to-profile-command in
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Photoshop) to have more flexibility. In addition, it might be possible to
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handle images and graphics and nearly all common colors with one intent,
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which simplyfies rendering of complete documents. I know nobody using
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saturation, might be a resource not really valuable...
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Maybe a suggestion worth thinking about?
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regards, Andre Schuetzenhofer
I completely agree with you if such a thing would be feasible. Relative
Colorimetric is the way to go. I never use Saturation. Although you could
say that all profile making software treat saturation differently. In fact,
they do the same with Perceptual and Colorimetric. All these people have
their "secret sauce" that they package in an ICC profile. ProfileMaker's
Colorimetric conversion is different from ColorSynergy's Colorimetric
conversion is different from ColorFlow's Colorimetric conversion and so
forth.
--
Roger Breton
Quibec Institute of Graphic Communications
Montrial (Quibec) Canada T. (514) 389-5061 F. (514) 389-5840
email@hidden