[Image-SIG] Problem with JPEG and CMYK color space

kevin at cazabon.com kevin at cazabon.com
Mon Apr 17 22:46:32 CEST 2006

I've verified that the patch works with current versions of Photoshop, but 
you do raise a good point Fredrik... it should be checked with other 
programs too.

Unfortuantely I don't have any other programs that read/write CMYK JPEG 
files... anyone else out there have one we can double-check with?  Maybe 
Corel Draw or something?

----- Original Message ----- 
From: "Fredrik Lundh" <fredrik at pythonware.com>
To: <image-sig at python.org>
Sent: Monday, April 17, 2006 8:32 PM
Subject: Re: [Image-SIG] Problem with JPEG and CMYK color space

> Cesare Leonardi wrote:
>> No one can confirm or add some info? It's a known problem? Fredrik?
> it was a while since I last messed around with this, but IIRC, CMYK in
> JPEG is one big mess, mainly because Adobe got it wrong in Photoshop
> many years ago.
> unless anyone can convince me not to, I'm going to trust you and Kevin
> on this one, and change PIL to always use the Photoshop behaviour.
> can anyone provide some samples ? (preferrably small images (<50k or so)
> with colors chosen so it's obvious what's what.  i.e. no blue trees or 
> green
> firetrucks, please ;-).
> </F>
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