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Topic: Thank God Leonard to hear that libjpeg support CMYK color.
Conf: (P-PDF) Developers, Msg: 59474
From: skajan
Date: 5/29/2002 05:39 PM

Actually i am running an exe file called djpeg.exe in dosprompt as follows.

c:\test\djpeg -outfile decompressedImage.jpg originalImage.jpg

i think i am not clear in this subject and i will post a very clear message
very soon. Also if u can, please tell me what routines i need to use in
order to compress and decompress JPEG (CMYK) images.

Thanks again

-----Original Message-----
From: p-pdf-developer Listmanager
Sent: Wednesday, August 15, 2001 2:34 PM
To: Recipients of 'p-pdf-developer' suppressed
Subject: Re: libjpeg

From: Leonard Rosenthol

--- Planet PDF Forum | ----

At 09:18 AM 8/15/2001 -0400, p-pdf-developer Listmanager wrote:
>i am using libjpeg to compress and decompress the jpeg image. it is working
>fine for RGB colorspace JPEG image. When i try to decompress a CMYK
>colorspace JPEG image it is throwing an error message as follows.
>"PPM Output must be Grayscale or RGB".
>Please help me. I am little bit confused.
I'm confused also, since PPM is a different image format.

What routines are you calling in libjpg? Without knowing EXACTLY
what you are doing, we can't really diagnose the problem. BUT I can tell
you that libjpg works just fine with CMYK images.


Leonard Rosenthol
Director of Software Development (215) 922-3509
Appligent, Inc. (formerly Digital Applications) (610) 284-4233 (fax)

PGP Fingerprint: 8CC9 8878 921E C627 0BC1 15BB FC19 64A9 0016 1397

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