Re: Scanner Profiling
Re: Scanner Profiling
- Subject: Re: Scanner Profiling
- From: Rich Apollo <email@hidden>
- Date: Wed, 17 Dec 2003 07:51:38 -0600
Armand,
If it helps, think of the wp and bp adjustments as exposure settings.
In a color managed workflow you're setting your scanner to capture a
fixed set of colors - this set is comprised of the whole color gamut
that the scanner is capable of capturing.
Your Dmin and Dmax are going to be fixed - Dmax at the extreme of the
scanner's capability, Dmin somewhere just inside of absolute white. Each
of your scans (hopefully) will fit somewhere inside this density range.
The point is that you have mapped how the scanner captures color and
scanning this way shows objectively how the image fits into the
scanner's color gamut. Basically, it's akin to being able to shoot a
camera at the same exposure all the time.
The black point and white point adjustments made downstream in Photoshop
are an optimization. A TX on Ektachrome will look washed out (in its raw
state) as compared to a TX on Velvia? (Velveeta?? - whatever that
High-Density TX material is called). The point is to have the scanner
capture everything it can to provide a faithful reproduction of the
original. The editorial adjustments happen downstream (and I think much
more quickly and in a more controllable manner). The color managed
workflow captures what is - not what we want.
--
Rich Apollo
Priority Litho
314-344-1144
email@hidden
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