Re: scanback profiling question
Re: scanback profiling question
- Subject: Re: scanback profiling question
- From: Steve Upton <email@hidden>
- Date: Thu, 8 May 2003 17:21:45 -0700
At 2:26 AM -0400 5/8/03, tom vanderlinden wrote:
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and the PCS> target uses the default intent of the target profile,
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it appears that for each initial choice of rendering intent
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the following permutations exist:
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Ask for Perceptual (for example), and you get:
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input>PCS rendered Perceptual & PCS>working space rendered RelativeCol
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*unless* target profile is not matrix based, then you could get:
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PCS>working space Perceptual, or AbsoluteCol, or RelativeCol, or Saturation,
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depending on the default intent of the target profile.
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So, I'm seeing 4 different permutations there,
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multiplied by the 4 rendering intents
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(and ignoring Black Point Compensation for the moment)
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= 20 possible flavors to anticipate.
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Someone please tell me I am wrong.
You are wrong. <g>
When you select an intent, Photoshop and other apps use rel col for the device->PCS transform and then your chosen intent for the PCS->device transform.
I have yet to find a single application that actually has an effect over the PCS->device intent, despite several claims to the contrary.
The default intent method applies when no intent is specified by the application. Then the intent specified in the input profile is what determines the output profile intent that is chosen... In practice very few tools do not specify the intent these days. That is typically a sign of a not-fully-implemented CMS that should be shied away from.
Hope this simplifies things for you...
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o email@hidden 206.985.6837
o ColorGear ColorThink ColorValet ColorSmarts ProfileCentral
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