Re: Real world experience w/ GMG and Oris RIPs
Re: Real world experience w/ GMG and Oris RIPs
- Subject: Re: Real world experience w/ GMG and Oris RIPs
- From: "Mike Eddington" <email@hidden>
- Date: Wed, 17 Nov 2004 15:30:45 -0500
- Importance: Normal
Title: Message
<are you sure the
process lowers the delta E of the
overall profile, or only of the particular
test values that are being
used, while errors in colors that lie between
those test values remain
the same, or even get worse ?
>
Good point. Although
I can't straight out confirm or disprove this, I can say that our target output
and our proof output have are as close a visual match as any proofing system
we've used prior. I would think if that if colors in between test values
remained the same or got worse, we'd see banding to some degree, which we don't.
<I'd take the
results of the 2004 IPA Color Proofing RoundUP with a large grain
of salt.
There were a number of flaws in the evaluation procedure, not the least
of
which was using four different instruments (none being the same as the
one
used for the original measurements, and different as in, different
manufacturers
and models) used to do the evaluation. Having seen how (say) a
Spectrolino
differs from a DTP41, this is not the way to determine margins
smaller than
2 Delta E..>
Another good
point...the difference between the ICColor and the Spectrolino is a little
tighter however, and if they had used the Spectrolino, we'd still be waiting for
the results ;-). The results of the Roundup showed only a weak correlation
between colorimetric and visual matching, However, my personal experience of
measuring the target and proof with the same instrument, show that a low delta E
does indeed correlate with a good visual match, although tweaking the profile
here and there still occurs.
....anticipating the
inevitable delta E vs delta E CMC/94/2000 now
;-)
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