[Image-SIG] Converting CMYK JPG image to RGB
kevin at cazabon.com
Fri Jun 17 16:40:41 CEST 2005
I know the problem you mention, but I also thought that a recent version of
PIL fixed it... I could be wrong though.
However - the other option would be to use ICC profiles to do color
conversion. If you want REALLY accurate conversion, this is the way to go.
I wrote a wrapper module called pyCMS that uses the littleCMS library to do
ICC conversions. See: http://www.cazabon.com/pyCMS
----- Original Message -----
From: "marc birot" <mbirot at u-prod.com>
To: <image-sig at python.org>
Sent: Friday, June 17, 2005 6:01 AM
Subject: [Image-SIG] Converting CMYK JPG image to RGB
> I'm trying to convert CMYK Jpg files to RGB Jpg files using
> The result shows very wrong colours.
> After checking the Image-SIG archives (Aug 2004) i found the following :
> "...Older versions of Photoshop generated broken CMYK files, and PIL
> attempts to compensate for this. try commenting out the following lines
> in PIL/JpegImagePlugin.py, and let me know if it helps:
> if self.mode == "CMYK" and self.info.has_key("adobe"):
> rawmode = "CMYK;I" # Photoshop 2.5 is broken! ..."
> Well, i tried and it does not work. The result i get is close to a
> 'negative' of the original picture ( not too close).
> Any suggestion to help on this problem ? :)
> Image-SIG maillist - Image-SIG at python.org
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