JBIG
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* [http://www.jpeg.org/jbig/index.html JBIG Homepage] | * [http://www.jpeg.org/jbig/index.html JBIG Homepage] | ||
* [http://www.fileformat.info/mirror/egff/ch09_07.htm JBIG Compression], from the Encyclopedia of Graphics File Formats | * [http://www.fileformat.info/mirror/egff/ch09_07.htm JBIG Compression], from the Encyclopedia of Graphics File Formats | ||
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Revision as of 15:04, 20 April 2013
Contents |
Overview
JBIG, also called JBIG1, is a lossless image compression algorithm and data format. The compression algorithm is based on arithmetic coding.
It is named after the organization which developed the format, Joint Bi-level Image experts Group.
JBIG is primarily used for bi-level images, but a JBIG codestream may contain multiple image "planes", which can be combined and interpreted as a grayscale image, or presumably even a full color image.
JBIG works best when contained in some other file format. It can be stored in a file by itself, but that's risky, because the specification does not fully describe how to interpret the colors of the pixels. Reasonably-portable JBIG files are probably limited to bi-level and grayscale, and even then, don't be surprised if black and white get reversed.
See also
Specifications
- ITU-T Rec. T.82
- ITU-T Rec. T.85 - Defines a subformat ("application profile") of JBIG.
Software
External Links
- Wikipedia article
- JBIG Homepage
- JBIG Compression, from the Encyclopedia of Graphics File Formats
