JBIG
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{{FormatInfo | {{FormatInfo | ||
|formattype=electronic | |formattype=electronic | ||
| − | |subcat= | + | |subcat=Compression |
|extensions={{ext|jbg}}, {{ext|jbig}}, {{ext|bie}} | |extensions={{ext|jbg}}, {{ext|jbig}}, {{ext|bie}} | ||
|released=1993 | |released=1993 | ||
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* [http://www.cl.cam.ac.uk/~mgk25/jbigkit/ JBIG-KIT]: A free C library | * [http://www.cl.cam.ac.uk/~mgk25/jbigkit/ JBIG-KIT]: A free C library | ||
* [[Netpbm]] - Uses a fork of JBIG-KIT. | * [[Netpbm]] - Uses a fork of JBIG-KIT. | ||
| + | * [[ImageMagick]] | ||
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| + | == Sample files == | ||
| + | * {{DexvertSamples|image/jbig}} | ||
== Links == | == Links == | ||
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* [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]] | ||
| − | [[Category: | + | [[Category:Graphics]] |
Latest revision as of 04:06, 28 December 2023
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 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.
Contents |
[edit] See also
[edit] Specifications
- ITU-T Rec. T.82
- ITU-T Rec. T.85 - Defines a subformat ("application profile") of JBIG.
[edit] Software
- JBIG-KIT: A free C library
- Netpbm - Uses a fork of JBIG-KIT.
- ImageMagick
