Re: Colorimetric Accuracy in the Field
Re: Colorimetric Accuracy in the Field
- Subject: Re: Colorimetric Accuracy in the Field
- From: Rich Wagner <email@hidden>
- Date: Wed, 05 Jun 2013 12:50:53 -0700
On Jun 5, 2013, at 8:31 AM, Ben Goren wrote:
> Essential to creating a good profile is being able to get to the unprofiled data, including before white balancing and gamma and exposure correction and what-not as well as after but before anything else has been done. Until you can get to that kind of data (which you easily can with any of the ``alternative'' raw developers), the whole issue is rather moot.
Ben,
Are you implying that a developer of DNG profiling software cannot get access to the "raw data" using the DNG SDK? If so, I don't think that's accurate. While it's true that the end user might not have access to this data, developers certainly should. How would you propose that the CC Passport software works to build de novo profiles?
Have you personally used dcpTool to untwist DNG profiles and rigorously test their accuracy to compare with your "other methods?" If you have, I would be interested in your results. There are a lot of reports of photographers getting excellent results with this method when looking to accurately reproduce color in studio settings.
As Eric Chan wrote roughly 4 years ago, "If accurate scene colorimetry estimates were all that photographers wanted, a 3x3 matrix (or set of 3x3 matrices) would suffice, possibly with a 2D table appended. Experience, however, has shown that photographers generally don't want that (witness the popularity of certain film stocks which also twist significantly)." http://forums.adobe.com/message/1209891
I'm personally not willing to give up the ease of use of ACR/LR right now for any other RAW processor, because whatever advantages they may offer in so-called "colorimetric accuracy" are far offset by workflow issues. In addition, in my experience with CC Passport built DNG profiles, they are more than adequate for most uses. Art repro is a different matter and an interesting topic, but that's not what most of us do.
--Rich
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