Re: Making scans of color negatives [was: Is there a profile with inverted values for soft proofing color negatives?]
Re: Making scans of color negatives [was: Is there a profile with inverted values for soft proofing color negatives?]
- Subject: Re: Making scans of color negatives [was: Is there a profile with inverted values for soft proofing color negatives?]
- From: MARK SEGAL <email@hidden>
- Date: Sat, 19 Sep 2009 17:40:15 -0700 (PDT)
In Silverfast, which does what Ian's approach does but faster and more reliably, you can go to Options>CMS and evaluate (by looking at the image on your display) the effect of selecting alternative Color Working Spaces (what in Silverfast-ese is the "Internal" space). I generally use ProPhoto, but on occasion I've had to use ARGB(98) Perceptual in order to tame some seriously OOG reds.
Mark
________________________________
From: Marco Ugolini <email@hidden>
To: ColorSync Forum <email@hidden>
Sent: Saturday, September 19, 2009 7:31:01 PM
Subject: Making scans of color negatives [was: Is there a profile with inverted values for soft proofing color negatives?]
Joel Mark wrote:
> Try Ian Lyons' method at this link:
> http://www.computer-darkroom.com/tutorials/tutorial_6_1.htm .
I agree that starting off by scanning a color negative as positive (and always in 16 bits!) is a good way to do it. I have done it that way myself, with more-than-decent results.
But one thing is left untouched in Lyons' otherwise good tutorial: which RGB color space (ICC profile) should one assign to the scan?
That is not a trivial question, since it affects both the tonal distribution and the color gamut of the resulting image.
It's a step for which I myself have not yet found a completely satisfactory formula. I would be curious to see how others tackle this specific challenge (the one of determining which RGB profile to assign to the positive scan of a color negative).
Marco Ugolini
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