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1. Re: ACR - Bug with embeded color matrix?
Thomas Knoll Jul 31, 2008 3:59 AM (in response to (Alex_Novak))There is a tag with the embedded profile name in the DNG file. You probably did not modify that. See the DNG 1.2.0.0 spec. -
2. Re: ACR - Bug with embeded color matrix?
(Alex_Novak) Jul 31, 2008 4:28 AM (in response to (Alex_Novak))I didn't, just changed values in matrices (there were no 1.2 specification at the time).
Thanks for quick answering. -
3. Re: ACR - Bug with embeded color matrix?
MadManChan2000Jul 31, 2008 10:02 AM (in response to (Alex_Novak))
Alex, note that the DNG 1.2 SDK also has some code to work with the new extended profile format. And the FAQ page has some sample code for getting started:
http://labs.adobe.com/wiki/index.php/DNG_Profiles_FAQ#SampleCode
(ed: Link fixed) -
4. Re: ACR - Bug with embeded color matrix?
Thomas Knoll Jul 31, 2008 10:17 AM (in response to (Alex_Novak))Typo in link: labs.stage.adobe.com -> labs.adobe.com -
5. Re: ACR - Bug with embeded color matrix?
(Alex_Novak) Aug 1, 2008 12:56 AM (in response to (Alex_Novak))Eric, Thomas,
thanks for answering. I read the documentation in the meantime.
As an explanation, this was only an experiment, I noticed this and thought it could be some bug, so I reported it. As I understand, implementing of DNG 1.2 started already in previous version odf ACR and introduction of ProfileName tag caused change of its behaviour
I did this because I had a small program for changing matrices in DNG that I written before, for use with dng-s from Canon Powershot compacts. As you maybe know, there is a software available on the internet (CHDK), that enables raw in those compacts, which can be converted to dng by another program (DNG4PS). Of course, ACR doesn't have matrices for these cameras and matrices written in those dng-s (mostly taken from Coffin's dcraw) are quite off (position of primary colors and white balance), so I sorted it myself for my A620. As I wasn't satisfied with colors in red range, produced by ACR from my 400D raws, I tried the same thing on raws from 400D (instead of using sliders in calibration tab)
After introduction of color profiles, this won't be necesarry anyway, as I see reds are much better now (that is also stated in Profile Editor FAQ)
with regards,
Alex -
6. Re: ACR - Bug with embeded color matrix?
MadManChan2000Aug 1, 2008 3:57 AM (in response to (Alex_Novak))
Cool, thanks for the explanation. Makes sense.