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: Graeme Gill <email@hidden>
- Date: Tue, 23 Nov 2004 05:06:19 +1100
- Organization: Color Technology Solutions Pty. Ltd.
Andy Fraser wrote:
> If this was the case the results would be appalling, something that I can confirm
> they are not. The iterative process that GMG employs is head and shoulders above
> using ICC profiles for proofing purposes and their calibration proceedure
> again using an iterative process) means that you can be 100 percent sure that
> your proofers are calibrated every single time.
I wouldn't expect the results to be appalling, just about the same as a non
iterative approach. There is no scientific basis that I'm familiar with, to
explain why an iterative approach provides any benefit, unless it is
aimed at the sort of fudge I mentioned. If you are verifying certain
colors only, then an iterative approach lets you discover exactly
which device values reproduces those colors. The delta E's for
those colors falls to a minimum (given the instrument accuracy
and repeatability errors), but this in itself doesn't change
anything about the overall profile accuracy, which should be
the same as a profile made from about the same number of overall
readings (ie. 4 iterations of 500 patches = 1 pass using 2000 patches).
The only reason one would logically need an iterative approach, is
if the system didn't allow printing of test targets with the same color
processing seen by the output of the profile.
Graeme Gill.
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