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Topic: Re: CMYK and LibJpeg - Cntd (Via Email)
Conf: (P-PDF) Developers, Msg: 87349
From: LeonardR
Date: 5/8/2003 09:55 PM

At 08:38 PM 5/8/2003 +1000, p-pdf-developer Listmanager wrote:
>The problem is while extracting CMYK image from a PDF file. If the file
>opened in Photoshop and invert it, looks fine and that is the result I am
>looking for.

OK...


>As Aandi advised I tried unzipping the stream first, but the zlib::inflate
>function always fails. The reason is:unknown compression method( looks
>like the compression method used is not Z_DEFLATED ).

If the image has a filter of DCTDecode, then trying to Deflate it
won't work - since it isn't FlateDecoded...zlib == Flate. DCT == JPEG. If
you want to decode it, use libjpeg.


Leonard

---------------------------------------------------------------------------
Leonard Rosenthol
Chief Technical Officer
PDF Sages, Inc. 215-629-3700 (voice)



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