GIMP file format images display green instead of B&W
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Description

https://commons.wikimedia.org/wiki/File:Romain_Rolland_de_face_au_balcon,_Meurisse,_1914.xcf
https://commons.wikimedia.org/wiki/File:Romain_Rolland_au_balcon,_Meurisse,_1914.xcf
These images are displayed in green. This is confirmed by another user.
I use Chrome on Windows 7, if it matters.


Version: 1.24rc
Severity: normal

Details

Reference
bz66323
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Yann created this task.Jun 7 2014, 3:47 PM

Appears to be an upstream bug in image magick.

We could perhaps work around it by doing:
-colorspace sRGB -channel R -separate

Change 138213 had a related patch set uploaded by Brian Wolff:
Workaround image magick issue with greyscale xcf files

https://gerrit.wikimedia.org/r/138213

In my testing, image magick seems to take a greyscale+alpha xcf as having the greyscale channel be red and blue (and alpha as green). For a plain greyscale xcf, it seems like they grey channel is interpreted as all the channels, including alpha

Upstream reports this fixed in ImageMagick 6.8.9-3 Beta

Change 138213 merged by jenkins-bot:
Workaround image magick issue with greyscale xcf files

https://gerrit.wikimedia.org/r/138213

This should be fixed on commons starting on July 8. After the fix goes live on commons, you may need to do ?action=purge on the file description page to get rid of cached thumbs with wrong colour.

Gilles moved this task from Untriaged to Done on the Multimedia board.
Gilles raised the priority of this task from "Normal" to "Unbreak Now!".
Gilles lowered the priority of this task from "Unbreak Now!" to "Normal".Dec 4 2014, 11:21 AM

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