Re: ICColor vs. DTP41
Re: ICColor vs. DTP41
- Subject: Re: ICColor vs. DTP41
- From: Dan Reid <email@hidden>
- Date: Tue, 18 May 2004 12:32:16 -0700
on 5/17/04 8:20 PM, Roger Breton at email@hidden wrote:
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I9ve read somewhere (Greg Barnett) that the ICColor, apparently, has some
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inherent bias in reading colors? In trying to substantiate that basis, I9ve
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been reading on the ICColor and the Spectrolino specs. For one thing, I
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found it odd that the ICColor accuracy is expressed in terms of dE*94, which
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is a weighted color difference metric, whereas the Spectrolino accuracy is
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expressed in terms of dE*ab, making it impossible (to my knowledge) to
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directly compare the two units: can 0.3 dE*94 (ICColor) be likened to 0.3
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dE*ab (Lino)? From my limited color knowledge, this suggests that the Lino
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is more 'accurate' than the ICColor.
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At any rate, I find the repeatability of the ICColor pretty low in
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comparison to the Spectrolino less than 0.2 dE*94 vs. 0.03 eE*ab for the
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Spectrolino? FWIW, the i1 has a better repeatability than the ICColor :
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0.1E* 94 vs. 0.2 dE*94. I know these differences are tiny but for the amount
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of money we have to pay for these instruments, I wonder if the ICColor is
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all that worthed?
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Inter-instrument agreements
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Average 0.3 E* 94 (ICColor) vs 0.4 E* 94 (EyeOne) vs 0.3 dE*ab (Lino). The
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ICColor seems to be 'better' than the EyeOone but it's not possible to
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compare it with the Lino.
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DTP41 specs are quoted in terms of dEcmc with a value 0.3. Inter-instrument
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agreement is quoted at 0.2 dE (does not say dE*ab or dEcmc or what, just
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dE?). So there we have it, no standard of comparison across manufacturers or
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even within the same manufacturer.
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Bottom line, is the ICColor any good?
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Roger Breton | Laval, Canada | email@hidden
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http://pages.infinit.net/graxx
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To make maters more interesting the preliminary brochures released at Drupa
for X-rite indicated 0.3 CMC inter-instrument agreement and 0.2 delta E (I
assume a*b*) repeatability on white for the new Slingshot (DTP70). No stats
available for the Xrite Pulse (EyeOne competitor)
All being said the ICColor does an impressive job with the limited jobs I
have done with it and see it as a good alternative to the 'lino.
--
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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