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Bug #9747

Imported TIFF exhibits bogus color fringing

Added by Torsten Bronger over 6 years ago. Updated over 6 years ago.

Status:
Fixed
Priority:
Low
Assignee:
-
Category:
-
Target version:
Start date:
12/27/2013
Due date:
% Done:

100%

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

Description

The attached TIFF contains a white grid on grey background. It only contains shades of grey. However, imported in Darktable, the grid lines become full of colours. This can also be seen in export.

testimage.tiff (528 KB) testimage.tiff Torsten Bronger, 12/27/2013 03:40 PM
testimage.tiff (528 KB) testimage.tiff Without EXIF make/model info Torsten Bronger, 12/27/2013 07:03 PM

Associated revisions

Revision fe2e2ef8 (diff)
Added by Henrik Andersson over 6 years ago

Rewrite of tiff reader code to support loading of grayscale images.
Adds handling of images with 1 sample per pixel which usally dont have
any planar config set. This fixes bug #9747 and #9699.

Revision 94d06206 (diff)
Added by Henrik Andersson over 6 years ago

Rewrite of tiff reader code to support loading of grayscale images.
Adds handling of images with 1 sample per pixel which usally dont have
any planar config set. This fixes bug #9747 and #9699.
(cherry picked from commit fe2e2ef8e3b608be2b26acdde4bc275a0162b552)

History

#1 Updated by Ulrich Pegelow over 6 years ago

  • Status changed from New to Duplicate

That's a duplicate of #9699, isn't it?

darktable treats these kind of TIFFs (1 color channel, 16 bpp, EXIF data indicating maker and model of a camera) as RAW files. What you see are the
consequences of color interpolation.

#2 Updated by Torsten Bronger over 6 years ago

I see it also without EXIF info. I attached a new file.

#3 Updated by Ulrich Pegelow over 6 years ago

  • % Done changed from 0 to 20
  • Target version set to Future
  • Status changed from Duplicate to Triaged

Right, darktable seems to fail when it comes to detecting grayscale TIFF images. Not sure though if fixing that might break other things,
expecially correclty dealing with those RAWs that come as TIFFs (ancient Canon cameras, Phase One).

#4 Updated by Henrik Andersson over 6 years ago

  • % Done changed from 20 to 100
  • Status changed from Triaged to Fixed

Fixed in commit fe2e2ef8e3b608be2b26acdde4bc275a0162b552

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