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d2b0bf4 Jul 2, 2012
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Welcome, gentle reader.
This is an encoder for JBIG2:
www.jpeg.org/public/fcd14492.pdf
JBIG2 encodes bi-level (1 bpp) images using a number of clever tricks to get
better compression than G4. This encoder can:
* Generate JBIG2 files, or fragments for embedding in PDFs
* Generic region encoding
* Perform symbol extraction, classification and text region coding
* Perform refinement coding and,
* Compress multipage documents
It uses the (Apache-ish licensed) Leptonica library:
http://leptonica.com/
You'll need version 1.68.
KNOWN BUGS:
The refinement coding causes Acrobat to crash. It's not known if this is a bug
in Acrobat, though it may well be.
USAGE:
See the jbig2enc.h header for the high level API, or the jbig2 program for an
example of usage:
$ jbig2 -s -p -v *.jpg && pdf.py output >out.pdf
to encode jbig2 files for pdf creation.
If you want to encode an image and then view output first to include in pdf
$ jbig2 -s -S -p -v -O out.png *.jpg
If you want to encode an image as jbig2 (can be view in STDU Viewer) run:
$ jbig2 -s feyn.tif >feyn.jb2
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