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CMYK to RGB conversion broken in 6.3.3
Posted: 2007-05-24T09:36:36-07:00
by t.hoepfner
Hi,
It seems, that CMYK to RGB conversion is broken in 6.3.3. I'm on MacOS X and use the MacPorts (ex DarwinPorts) version of ImageMagick. I've put some images showing my problem here:
Input
Output with 6.3.2 (OK)
Output with 6.3.3 (broken)
Here's what I did to create the images:
Code: Select all
# Test 6.3.2
[mbp:~/Downloads/IM] th% convert -version
Version: ImageMagick 6.3.2 02/16/07 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2007 ImageMagick Studio LLC
[mbp:~/Downloads/IM] th% convert +profile "*" -colorspace RGB in.jpg out632.jpg
# Test 6.3.3
[mbp:~/Downloads/IM] th% convert -version
Version: ImageMagick 6.3.3 05/04/07 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2007 ImageMagick Studio LLC
[mbp:~/Downloads/IM] th% convert +profile "*" -colorspace RGB in.jpg out633.jpg
Is it a bug or is there some different default behaviour in 6.3.3 which I do have to respect in some way?
Thanks for your help,
Timo
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-05-24T09:50:17-07:00
by magick
Your links return 404.
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-05-24T10:12:42-07:00
by t.hoepfner
I corrected the URLs in the original message. Sorry for that.
Timo
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-05-24T10:56:14-07:00
by magick
We can reproduce the problem and will have a fix in ImageMagick 6.3.4-3 Beta within a day or two. In the mean-time this is the proper way to convert the image and it works with ImageMagick 6.3.3:
- convert cmyk.jpg -profile rgb.icc rgb.jpg
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-05-25T01:53:32-07:00
by t.hoepfner
That sounds great. Thanks a lot.
Will it then be available in /pub/ImageMagick/beta on the FTP server or only in SVN?
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-05-25T08:48:10-07:00
by magick
6.3.4-3 Beta is available now in the beta folder of the FTP site and its available from SVN now.
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-05-25T09:46:41-07:00
by t.hoepfner
Just compiled a new version and did the test again. Works perfectly.
Thanks a lot for the super fast resolution of this problem.
Timo
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-08-24T00:04:35-07:00
by NickKuh
I've found the same problem. I'm trying to update ImageMagick to 6.3.4-3 - is this possible using Darwin Ports? What would the command line be?
Thanks!
Nick
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-08-24T06:03:14-07:00
by t.hoepfner
Yes, there is a more recent version of ImageMagick available in DarwinPorts (now called MacPorts). You have to force MacPorts to update its package descriptions. In Terminal execute:
to be sure
execute it twice.
then do a
which today returns
Code: Select all
ImageMagick graphics/ImageMagick 6.3.5-6 Tools and libraries to manipulate images in many formats
If you want to update to that version, then type
and wait until it's finished.
BTW: Ghostscript was also recently changed:
Code: Select all
sudo port search ghostscript
ghostscript print/ghostscript 8.60 GPL Ghostscript, An interpreter for PostScript and PDF
ghostscript-fonts-hiragino print/ghostscript-fonts-hiragino 8.60 Japanese Hiragino fonts for ghostscript 8.60
I don't know if it will update that automatically with ImageMagick.
Timo
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-08-24T10:46:44-07:00
by NickKuh
Superb! Problem solved!
Thank you very much!
Nick
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-09-03T01:09:28-07:00
by NickKuh
Further to my previous mail I've tried to update ImageMagick on my live Linux server (OS X is my offline test environment) to correct the same problem. I downloaded ImageMagick-6.3.5-7.tar.gz and then extracted it's contents to my home directory. I then ran ./configure followed by a make install as sudo.
When I check the installed version:
convert -version
I get :
Version: ImageMagick 6.3.5 09/03/07 Q16
http://www.imagemagick.org
Copyright: Copyright (C) 1999-2007 ImageMagick Studio LLC
However, the original problem (CMYK > RGB conversion) is still not resolved on the Linux version.
Here's the file I've been testing/having problems with:
http://www.editioninteractive.net/imagemagick/start.tif
Am I doing something wrong with the install?
Re: CMYK to RGB conversion broken in 6.3.3
Posted: 2007-09-03T01:17:21-07:00
by NickKuh
I should also add that when I convert via OS X I get no error and when I convert via the Linux installation I get 2 errors:
Code: Select all
convert /home/edition/dev.goodprint.co.uk/export-test/start.tif -colorspace RGB -resample 300 /home/edition/dev.goodprint.co.uk/export-test/end2.png
convert: unknown field with tag 700 (0x2bc) ignored. `/home/edition/dev.goodprint.co.uk/export-test/start.tif'.
convert: unknown field with tag 34665 (0x8769) ignored. `/home/edition/dev.goodprint.co.uk/export-test/start.tif'.
