Re: Colorimetric Accuracy in the Field
Re: Colorimetric Accuracy in the Field
- Subject: Re: Colorimetric Accuracy in the Field
- From: Andrew Rodney <email@hidden>
- Date: Wed, 05 Jun 2013 10:46:11 -0600
On Jun 5, 2013, at 10:25 AM, Iliah Borg <email@hidden> wrote:
> Well, the values Bruce used for the test at http://www.creativepro.com/article/out-gamut-calibrating-camera-raw-photoshop-cs are average published values, and resulting accuracy report is not available unless I'm missing something.
I don't understand what more you want, but what I see is what Bruce reports he produced. I've knew Bruce since the early 90's and I'm the last person to question his results or testing. I supsect others here who knew Bruce would say about the same thing. He provided the Lab values of the target and the Lab values from ACR and the two match. Enough said.
> The user base of ACR and LR is large enough to warrant third parties providing at least half a dozen of profiling applications, much the same as it is with Photoshop proper plugins. Guess why those apps are missing. Software developers suddenly stopped striving for fame and money? A Conspiracy against Adobe? Maybe not...
Could it be there's no need despite the claims the product can't produce colorimetric accuracy (despite Bruce's results), that anyone spending the time and money to provide a solution in search of a problem would lose a ton of money? In fact, the base is large enough where you'd expect all kinds of bitching and moaning about the lack of so called colorimetric accuracy yet only a tiny sliver of people are reporting any such issues and nearly all in this group!
Look, I have no dog in this fight, I'm here to learn. I've asked repeatedly for the definition of colorimeric accuracy and I see one of the most respected color geeks every doing just that in ACR. Bruce isn't here to clarify what he did. If you want a dog in this fight, start implying Bruce didn't do what Bruce clearly shows or fudged his results!
I asked previously how many samples does one have to measure at the scene to qualify colorimetric accuracy at the scene and got no answers. Well I got one from Ben saying he doesn't measure at the scene. Then when Bruce shows ACR providing 24 colorimetric matches, I'm told that's not enough and such this test is somehow invalid or there's no accuracy report. The numbers Bruce shows (and produced) match the numbers of the target in Lab. Cries of foul which is odd.
I do indeed have a SG and will see if I can find an ACR script that will run such Bruce's procedures can be used but I don’t it will handle that target. Doing this manually with 24 patches is a lot of work moving the various sliders. I'll see if I can do this but I think the anti-ACR advocates are just creating a big fat rabbit hole here. How is 24 matches of colorimetric values through ACR illustrate it's unable to produce colorimetric matches?
Some here are using an odd way to define their case: In examples where we say colorimeric accuracy is produced, it's produced unles we say it's not produced (despite the illustration of a numeric match).
Andrew Rodney
http://www.digitaldog.net/
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