Dear Artur and Matt,
thank you for replies. The color picker says that the blue channel
multiplier is smaller in the images from darktable compared to camera
jpegs. Example RGB readings:
darktable - (136, 106, 68)
camera jpeg - (137, 106, 78)
You can see a comparison of darktable export vs camera jpeg here
https://www.dropbox.com/s/0tmosar1pfw47tm/20131227-021432-compar.jpg
The original files are available here, if you would like to check it.
https://www.dropbox.com/sh/rey2xlewz1y8j45/1yjWQf-k2S
When I import the both the jpeg and raw into darktable, they have visibly
different white balance as can be seen in
https://www.dropbox.com/s/5o11xbisn3iybew/Screenshot%20from%202014-01-31%2020%3A34%3A00.png
Bottom line:
All pictures here are using "camera white balance", "olympus like
alternate" base curve and no other plugins. The issue appears in daylight
as well as in artificial light.
I didn't calibrate my display, but from comparison with professional prints
of photos that I prepared, it appears that the factory calibration of the
display (EIZO PVA) is quite good. Nevertheless, it shouldn't play a role in
this issue.
Best regards,
Stepan
On Tue, Jan 28, 2014 at 11:28 PM, Matt Feifarek <[email protected]>wrote:
>
> On Sat, Jan 25, 2014 at 9:50 AM, Štěpán Roučka <[email protected]>wrote:
>
>> I have recently purchased the Olympus E-M5 camera and the raw files
>> developed with darktable have green color cast in comparison the jpegs from
>> camera. I am using the default settings: "olympus like alternate" base
>> curve, "enhanced color matrix", and "camera white balance".
>
>
> I have this camera, and have used it with Dt for more than a year now...
> I've never noticed this.
>
> I'd look at your display profile settings, and make sure they aren't
> strange.
>
> Also, a clue might be: what happens if you import the SAME IMAGE both as
> RAW and as JPEG, does the JPEG exhibit the same color cast? If so, this
> would indicate something more globally wrong...
>
> If you like, send me a raw file, and I will pull it up and see if I have
> the same problem... I can do a screen capture. Off-list, of course.
>
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