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Topic: RE: RunLengthDecode and CCITTFaxDecode filters
Conf: (P-PDF) Developers, Msg: 58408
From: skajan
Date: 5/29/2002 05:32 PM

Thnaks Aandi

-----Original Message-----
From: p-pdf-developer Listmanager
[mailto:listmanager@forum.planetpdf.com]
Sent: 10 October 2001 17:27
To: Recipients of 'p-pdf-developer' suppressed
Subject: RunLengthDecode and CCITTFaxDecode filters


From: "Aandi"

--- Planet PDF Forum | http://forum.planetpdf.com ----

RunLengthDecode is fairly trivial to implement yourself - it is just a few
lines of code.

Fax encoding is much more complex. I'm not aware of any library specifically
to do it, but you might be able to adapt the code in libtiff, which can
handle fax-encoded image strips. Even with this, it is a major project. It
is, however, just about possible to implement your own code, which I did. I
found a valuable book called something like the "Fax Modem Sourcebook" with
a detailed explanation of the protocol.

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