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Request #63331 Default colorspace in ImageMagick has changed
Submitted: 2012-10-22 12:07 UTC Modified: 2015-01-05 02:52 UTC
Votes:2
Avg. Score:3.0 ± 2.0
Reproduced:0 of 1 (0.0%)
From: remko at paragin dot nl Assigned:
Status: Not a bug Package: imagick (PECL)
PHP Version: 5.3.18 OS: Mac OS X (Mountain Lion)
Private report: No CVE-ID: None
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From: remko at paragin dot nl
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 [2012-10-22 12:07 UTC] remko at paragin dot nl 
Description:
------------
According to http://www.imagemagick.org/discourse-server/viewtopic.php?f=4&t=21269 
, the default colorspace from ImageMagick has been changed from linear RGB to 
sRGB. This means that when I create a new image with "newImage()", the system 
assumes the sRGB colorspace. 

This means that my images now turn out a lot darker than earlier (see also 
http://blog.dev001.net/post/32682776195/typo3-workaround-for-too-dark-images-
since). Besides this, when I convert this back to RGB colorspace using the 
setColorSpace function, the conversion gives unexpected results, and creates 
images that have slightly different color than expected.

To fix this in the commandline version of ImageMagick, you need to set the default 
colorspace by using "-colorspace RGB" as your first parameter. The PHP module does 
not have an option for setting the default colorspace, so each new image or 
ImagickPixel that is created has the sRGB colorspace by default (see code 
example).

I'm using imagick module version 3.0.1, together with ImageMagick 6.8.0-0 2012-10-
18, which is the current defautl MacPorts version.

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 [2013-06-11 07:34 UTC] remko at paragin dot nl 
After doing a upgrade of ImageMagick / Imagick with Macports, the issue appears to 
be fixed. 
The current versions I have are: 

PHP 5.4.16
imagick module version	3.1.0RC2
ImageMagick version	ImageMagick 6.8.5-5 2013-06-10 Q16 
http://www.imagemagick.org

I've no idea what actually changed.
 [2015-01-04 16:30 UTC] Danack at basereality dot com 
There are some more details of what was changed here:

http://www.imagemagick.org/script/color-management.php

The short version of which is....everything is 'fine', but yes current versions of ImageMagick may not behave exactly the same as quite old versions of ImageMagick.
 [2015-01-05 02:52 UTC] danack@php.net
-Status: Open +Status: Not a bug
 [2015-01-05 02:52 UTC] danack@php.net 
Not a bug.
 
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