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Bug #9590

TIF from Nikon D300s appear too light

Added by Richard Wonka over 6 years ago. Updated over 5 years ago.

Status:
Fixed
Priority:
Low
Category:
Darkroom
Target version:
-
Start date:
09/19/2013
Due date:
% Done:

100%

Estimated time:
Affected Version:
git development version
System:
Ubuntu
bitness:
64-bit
hardware architecture:
amd64/x86

Description

The attached tiff from a Nikon D300s shows up very differently (in lighttable and darkroom) on darktable than it does in camera or in other image viewers.
No changes applied in the darkroom.
There is something not right.

2013-09-19__DSC7163_0032.TIF (35.3 MB) 2013-09-19__DSC7163_0032.TIF Richard Wonka, 09/19/2013 11:49 AM

History

#1 Updated by Pascal de Bruijn over 6 years ago

While I haven't had time to dig in, a cursory examination reveals this is an Adobe RGB encoded TIF.

If I recall correctly we only read color profiles from JPG files, so we're likely reading it as sRGB.

Also keep in mind that lighttable mode isn't fully color managed to begin with as documented here:

http://www.darktable.org/2013/05/display-color-management-in-darktable/

#2 Updated by Richard Wonka over 6 years ago

Pascal de Bruijn wrote:

While I haven't had time to dig in, a cursory examination reveals this is an Adobe RGB encoded TIF.

It is. The camera was set to Adobe RGB.

If I recall correctly we only read color profiles from JPG files, so we're likely reading it as sRGB.

Ah, there lies the culprit.

I think we can consider this a bug, right?

Also keep in mind that lighttable mode isn't fully color managed to begin with as documented here:

It also appeared too light in the darkroom. I will see if I can change the colour space and get a better result.

Thank you for the pointer.

#3 Updated by Tobias Ellinghaus over 6 years ago

Just set the profile to AdobeRGB in the input color profile module and see if that helps.

#4 Updated by Pascal de Bruijn over 6 years ago

If that resolves the issue, this should be converted into a feature request to support colorspaces in TIFFs.

#5 Updated by Pascal de Bruijn over 6 years ago

Bump. Please do report back :)

#6 Updated by Richard Wonka over 6 years ago

Hmm.. I've got the tif, now I have to get the in-camera jpeg to compare the two. will update when I've got that from my friend.

#7 Updated by Roman Lebedev over 5 years ago

  • bitness set to 64-bit
  • % Done changed from 0 to 100
  • Assignee set to Tobias Ellinghaus
  • Status changed from New to Fixed

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