Re: is "grayscale profiling" possible?
Re: is "grayscale profiling" possible?
- Subject: Re: is "grayscale profiling" possible?
- From: Dan Reid <email@hidden>
- Date: Fri, 27 Jun 2003 09:58:46 -0700
on 6/26/03 6:59 AM, Armand Rosenberg at email@hidden wrote:
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I know this question is a bit different (what did you expect...?)
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I was wondering if anyone can suggest a technique for making high
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quality (ie truly neutral) RGB printer profiles *specifically* for
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grayscale (b&W) printing. The printers are desktop inkjets.
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I'm sure there are high-power tools for doing this, but that's not
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what I'm asking here. I wonder if I can do it myself using what I
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already have (I'm not really too eager to spend more money).
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Available tools are PS7, a ColorMouse and CompassProfile. The results
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using 125 RGB patches and "Grayscale Control" in CP are pretty good
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but, if I stare long enough and close enough, I still see ever so
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slight density-dependent tonal shifts in the grayscale prints (the
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current bane of my color world).
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I've wondered on occasion if measuring the 500+ or 700+ patch targets
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would help, but the thought of spending so much quality time with the
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ColorMouse has deterred me from actually trying.
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Please, no ImagePrint suggestions... these particular printers aren't
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even supported, and anyway I'm not the least bit interested in
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spending (gambling, as I see it) $500.
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And as far as Jon Cone's new system -- I've stopped holding my
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breath. In any case, it'll take a while even after it's actually
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released to see if it really works well, and what the issues are with
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his inks in various printers and on various papers. His current
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system doesn't support these printers, nor glossy prints in general.
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Back to reality: It occurs to me that the standard profiling target
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just may not have enough near-neutral patches, since it's trying to
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enclose as much of the printer's gamut as possible. But in my case
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I'm willing to scrifice most of that gamut for neutrality in
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grayscale. These "grayscale profiles" would never be used for
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printing color, so gamut is not a problem. But can this be done??
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Or is my only option to just stop staring...?
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Armand
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More patches (samples) will help but you will never get you dead neutral
prints using a RGB path with the tools listed. You have a shot at getting
good neutrals with a CMYK print path way as you can control black generation
(neutrality) separation settings unlike a RGB print path.
I have been totally amazed at the dead neutral grayscale output from
both RGB and CMYK output profiles using Xrite's new ColorShop X software.
You can build "Rich Gray" ICC profiles from your existing printer ICC
profiles. These Rich Gray ICC profiles look as regular ICC output profiles
in Photoshop and ColorThink but produce amazingly neutrality across the
whole tonal range. Check it out for free @
<
http://www.xrite.com/Products/Product.asp?Show=Description&id=505>
--
Dan B. Reid
RENAISSANCE PHOTOGRAPHIC IMAGING
Color Management Products & Training for Print, Internet, & Motion Graphics
http://www.rpimaging.com | Toll Free: (866) RGB-CMYK
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