Skip to content
master
Go to file
Code

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
doc
 
 
src
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

README.md

This is an encoder for JBIG2.

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
You can’t perform that action at this time.