On Sat, May 20, 2017 at 3:31 PM, Swee Oon <[email protected]> wrote: > Thanks to all the people who tested out my problem CR2 raw file. It seems > likely that Canon has written the white balance into the exif for such > multiple-exposure files in such a way that darktable stumbles when reading > it. Yes and no. I believe when the "White balance correction" setting is enabled on that (and some other?) camera, canon decided to bake the whitebalance directly into the raw data. And the white balance is still there. So we end up applying it twice...
Swee, could you please take some other raw image with the same settings (monochrome, wb corrected), check that it exhibits the same problem, and upload it to https://raw.pixls.us/ (do read what it should {, not} contain first please)? Then there is higher chance of the problem being eventually fixed :) https://github.com/darktable-org/rawspeed/issues/102 > I have had no problems with single-exposure CR2 raw files in darktable. > Looks like I can put off upgrading my linux OS until later. :-) Your choice, but 2.0.x is old and unsupported :) > Swee Roman. > On 20/05/17 20:13, Gys van Zyl wrote: > > Same issue with darktable 2.2.4. Preview looks OK until opening the photo in > darkroom. Turning off the white balance module makes it look OK again, or in > white balance module, pushing the tint up all the way to 1.5. > > On Sat, May 20, 2017 at 9:32 AM, Swee Oon <[email protected]> wrote: >> >> On 20/05/17 02:31, Roman Lebedev wrote: >> >> On Fri, May 19, 2017 at 6:16 PM, Swee Oon <[email protected]> wrote: >> >> I am having this strange problem with darktable and my Canon EOS 6D. Below >> is a description of the problem. >> >> Which darktable version? >> >> The problem is either the wrong white balance being read (is that RAW >> HDR?), >> or wrong black/white levels being read. >> >> I'm using darktable 2.0.7, and it doesn't look like I can get any other >> later version because my linux mint 17.3 is based on ubuntu 14.04. I'll have >> to upgrade to linux mint 18.1 to get any later darktable updates from the >> pmjdebruijn ppa. >> >> My Canon 6D does not support raw HDR. The file is just a normal CR2 raw >> file, with multiple exposures on it. It's possible that the multiple >> "averaged" exposures is screwing up the white balance data, but then why >> does the jpeg preview look OK? Strangely enough, my google drive preview of >> the file also shows a magenta cast. >> >> Before I go into the hassle of installing a new linux mint OS to use the >> latest darktable version, can someone confirm that this is not an issue with >> darktable's reading of the file? Here is a link to one of the problem files: >> <https://drive.google.com/file/d/0B5_J2e-_7tXiNXl4VXB6NWxQNFU/view?usp=sharing> >> >> Thanks so much. > > > > ____________________________________________________________________________ > darktable user mailing list to unsubscribe send a mail to > [email protected] ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
