Thumbnail rendered with green cast (due to color profile?)
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	Thgoiter
	Dec 10 2013, 10:16 PM

Description

This file's thumbnail was rendered in a green cast for me and at least one other user (first version as of Feb. 2010 before it got changed):
https://commons.wikimedia.org/wiki/File:Ortler_Alpen_Specialkarte_Meurer-Freytag.jpg

Then the image was improved and the new version looks good now.

I cannot see the green cast of the old version with IE but still with Firefox, see screenshot:
https://dl.dropboxusercontent.com/u/7485987/ortler.png

I think I remember looking at this file months ago when it wasn't green (as the old version still looks like in full size).
Did you change anything in the image renderer causing this green cast (and resulting by this the creation of a new version of that file at [[:de:WP:Kartenwerkstatt]])?

Version: 1.23.0
Severity: minor

Details

Reference: bz58294

Event Timeline

• bzimport raised the priority of this task from to Lowest.Nov 22 2014, 2:40 AM

• bzimport added a project: MediaWiki-File-management.

• bzimport set Reference to bz58294.

• bzimport added a subscriber: Unknown Object (MLST).

Thgoiter created this task.Dec 10 2013, 10:16 PM

Traditionally this sort of thing has been caused by embedded color profiles which are supported in some browsers and not others

Exiftool on the original image says:

Warning: Invalid or extraneous ICC_Profile chunk(s)
Warning: Bad length ICC_Profile (length 435696)

http://regex.info/exif.cgi?imgurl=https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Farchive%2Fc%2Fc0%2F20131208124150%2521Ortler_Alpen_Specialkarte_Meurer-Freytag.jpg

Probably related.

The actual thumbnail has appearantly a weird colour profile:

WARNING: Embedded color profile: “(unrecognized embedded color profile 'CrystalHS')”Some popular web browsers ignore embedded color profiles, meaning users of those browsers see the wrong colors for this image. - http://regex.info/exif.cgi?dummy=on&imgurl=https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2Farchive%2Fc%2Fc0%2F20131208124150%2521Ortler_Alpen_Specialkarte_Meurer-Freytag.jpg%2F120px-Ortler_Alpen_Specialkarte_Meurer-Freytag.jpg

The full image has a CrystalHS profile as well:

$ identify -verbose 20131208124150\!Ortler_Alpen_Specialkarte_Meurer-Freytag.jpg | grep -A4 icc

Profile-icc: 435696 bytes
  Description: CrystalHS
  Manufacturer: CrystalHS
  Model: CrystalHS
  Copyright: Copyright (C) Heidelberger Druckmaschinen AG - ScanOpen ICC 2.0.3.0

So maybe that profile has some error, and the thumbnail generator actually fixes it?

I'm going to close this invalid. It appears that the file in question had incorrect colour information, so not really a bug with us.

Thgoiter unsubscribed.Nov 30 2014, 3:15 PM

• Gilles added a project: Multimedia.Dec 4 2014, 9:22 AM

• Gilles raised the priority of this task from Lowest to Unbreak Now!.Dec 4 2014, 10:12 AM

• Gilles moved this task from Untriaged to Done on the Multimedia board.

• Gilles lowered the priority of this task from Unbreak Now! to Lowest.Dec 4 2014, 11:23 AM

Thumbnail rendered with green cast (due to color profile?)Closed, InvalidPublicActions

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Thumbnail rendered with green cast (due to color profile?)
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