RE: SWOP Proof Certification, TRxxx Characterization Data
RE: SWOP Proof Certification, TRxxx Characterization Data
- Subject: RE: SWOP Proof Certification, TRxxx Characterization Data
- From: Roger Breton <email@hidden>
- Date: Mon, 27 Oct 2008 22:17:33 -0400
Klaus,
In doing some research on the Fogra Media Wedge, I stumbled upon a post you
made recently on the List in which you wrote:
> As the acceptable tolerance for the max. Delta E on the Fogra MediaWedge
> is 6, Martin already uses up 73% of the tolerance range.
It was an exchange with Mike Strickler -- hi Mike!
Now I wanted to understand the interesting histogram here:
> <http://digitalproof.info/colorsync-users/MediaWedge2-
> Reproducibility.pdf>
And, honestly, I have to admit I could not understand what the bar height
represented. Maybe everybody else did, but please excuse my ignorance.
I could not get over this concept of "percentages".
And then, while reading your exchange with Mike, above, it suddenly became
clear that the percentages represented the ratio of the actual DeltaE to the
Max DeltaE acceptable.
What is the advantage of using such a representation?
> Here is a plot containing Fogra Media Wedge v2 evaluations for four
> different proofs,
Allow me eine frage: is it fier different proofs from the *same* proofing
system?
> The bar height equates to the error in % of the admissible tolerance
> for
> the respective criterion (average of both measurements). The black
> error
> bars equate to the reproducibility for this two devices:
How does one interpret the "reproducibility"? Again, please excuse my
ignorance. Is that the average of 10 readings on the same patch? Or do you
mean inter-instrument agreement? Sorry, it is not clear to me :(
> One can see that the average Delta E can be determined with good
> reliability while the results for other criteria (based on fewer
> patches
> or only one patch) are much more doubtful.
>
> Klaus
Roger
P.S. Maybe the vertical axis should not have values higher than 100%?
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