Re: Ugra/Fogra Media Wedge v3.0 [was: Colorsync-users Digest, Vol 5, Issue 299]
Re: Ugra/Fogra Media Wedge v3.0 [was: Colorsync-users Digest, Vol 5, Issue 299]
- Subject: Re: Ugra/Fogra Media Wedge v3.0 [was: Colorsync-users Digest, Vol 5, Issue 299]
- From: Martin Orpen <email@hidden>
- Date: Thu, 11 Sep 2008 09:50:05 +0100
On 11 Sep 2008, at 07:05, Mike Strickler wrote:
But to dispel the notion that one cannot get good results with PM5,
I can tell you that I regularly achieve max dE on a full IT8.7/4
against a GRACoL reference (very close to Fogra 39) for all patches
(including the worst 5%) of less than 5, sometimes less than 4,
using PM5 and a few iterations, with avg. dE of all patches in the .
6 range and grey hue error of down around .2 or so. This is just
routine, as are proofs that have smooth gradations and other
"immeasurables." So I just have to throw up my hands and say either
there really was no problem, or if there was I don't know what
caused it and wouldn't know unless I saw it myself.
I'm betting that the reason that you use a "few" iterations is that
the Profilemaker profile will not respond in a favourable way to more
than 3 iterations!
My reason for posting was to let other *users* know that using a
*free* CMS is giving me better results than Profilemaker. The last
iteration using the Argyll paper profile gave me these figures for IT8
7.4 chart read with a DTP70:
Av dE: 0.722
Max dE: 3.725
White dE: 0.304
Gamut: 98.824%
Which is a whole 4dE better on the maximum than I could get from a
paper profile made from the same data using Profilemaker.
The results from Profilemaker might be "good" but they aren't good
enough when 6 dE means your proof has failed and ends up in the bin
instead of going to the client.
And no European client is going to be impressed with an ISO 12647-7
approval sticker that says Max Peak 5.2 when the tolerance is 6.0 -- I
want to ace the test, not scrape it...
--
Martin Orpen
Idea Digital Imaging Ltd
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