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: Thu, 25 Nov 2004 09:41:25 -0500 (EST)
- Organization: North American Color, Inc.
<It would be remiss of me not to warn about various benchmarking tricks that I'm aware of, if
such things are not widely known.>
I recall a situation that occured in the past with GMG. Target values from DTR004, created from the it8
testchart, were mistakenly imported into to an eci2002 based profile. Because of this, some fulcrums did not have any target values and therefore the software did not calculate them. Since the CMYK values for those fulcrums were defined, but not iterated, the values did not change, while the fulcrums that had target values did change. The resulting proof looked horrible.
To fix this error, the fulcrums that had no target data were removed and the proof was reiterated using the it8. The delta E dropped below 1 and there was a good visual match to the target. This indicates to me that the software does indeed have a plan for colors outside of the patches of the chart it is iterating. Unless the colors outside the test chart are locked in place by the software via fulcrums with empty target data, they will be adjusted.
Now whether this iterative process add value to the profile I suppose may still be open for debate. I feel that a process that can adjust the delta E from an intial reading of 3-4 to 1 or lower, and lower the max delta E from 7-13, to 4 or lower does add value, if only for the patches it measures. But again, it appears to me that the patches outside the test chart are indeed adjusted as well.
mike
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