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Date: Thu, 3 Mar 2005 09:56:34 -0600 (CST)
From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
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To: Beppe Costagliola <beppecosta@yahoo.it>
Subject: Re: [Tiff] Tiff G4 
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On Thu, 3 Mar 2005, Beppe Costagliola wrote:

> I' have a Tiff compressed with G4.
>
> Is it possible to run tiffcp and re-compress it to save space (even 
> with lossy compression) ?

Except for re-sampling/filtering the data to contain less detail and 
re-saving using G4 (or even LZW) compression, the only alternative 
that would save even more space would be to use JBIG compression, and 
libtiff does not seem to support that.

There is a (GPLed) libjbig.  I understand that there are patents which 
apply to JBIG.

Current PDF supports JBIG compression so you can obtain commercial 
software to support it.

Of course these solutions are not TIFF.

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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