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Jbigkit

May 26, 2018

Lossless compression for bi-level images such as scanned pages, faxes

JBIG-KIT implements a highly effective data compression algorithm for bi-level high-resolution images such as fax pages or scanned documents.

This is a portable library of compression and decompression functions with a documented interface that can be included into your image or document processing software. Also provided are ready-to-use compression and decompression programs with a simple command line interface similar to the converters found in Jef Poskanzer’s PBM conversion package.

JBIG-KIT implements the specification

International Standard ISO/IEC 115441993 and ITU-T Recommendation T.821993, “Information technology - Coded representation of picture and audio information - progressive bi-level image compression”, <http//www.itu.ch/itudoc/itu-t/rec/t/t82_23822.html>,

which is commonly referred to as the “JBIG standard”. JBIG Joint Bi-level Image experts Group is the committee which developed this international standard for the lossless compression of images using arithmetic coding. Like the well-known compression algorithms JPEG and MPEG, also JBIG has been developed and published by the International Organization for Standardization ISO and the International Telecommunication Union ITU see also <http//www.iso.ch/> and <http//www.itu.ch/>.

WWW http//www.cl.cam.ac.uk/~mgk25/jbigkit/