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: Dan Reid <email@hidden>
- Date: Tue, 23 Nov 2004 13:38:54 -0700
on 11/22/04 11:06 AM, Graeme Gill at email@hidden wrote:
> 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.
>
I respectfully suggest you look at the GMG product before making posts on or
why they take a different approach. Having worked with the product AND made
sample prints I can attest to the superior color match.
If you were to look seriously into the product you would find out how they
use iterative process to hone in on a superior color match.
--
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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