JBIG
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|formattype=electronic | |formattype=electronic | ||
|subcat=Graphics | |subcat=Graphics | ||
| − | |extensions={{ext|jbg}} {{ext|jbig}} | + | |extensions={{ext|jbg}}, {{ext|jbig}}, {{ext|bie}} |
|released=1993 | |released=1993 | ||
}} | }} | ||
| − | |||
'''JBIG''', also called '''JBIG1''', is a lossless image compression algorithm and data format. The compression algorithm is based on [[arithmetic coding]]. | '''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'''. | 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 | + | 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. | 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. | ||
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== See also == | == See also == | ||
* [[JBIG2]] | * [[JBIG2]] | ||
| + | * [[TIFF-FX]] | ||
== Specifications == | == Specifications == | ||
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* [http://netpbm.sourceforge.net/ Netpbm] - Uses a fork of JBIG-KIT. | * [http://netpbm.sourceforge.net/ Netpbm] - Uses a fork of JBIG-KIT. | ||
| − | == | + | == Links == |
* [[Wikipedia:JBIG|Wikipedia article]] | * [[Wikipedia:JBIG|Wikipedia article]] | ||
* [http://www.jpeg.org/jbig/index.html JBIG Homepage] | * [http://www.jpeg.org/jbig/index.html JBIG Homepage] | ||
Revision as of 00:14, 27 September 2013
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 |
See also
Specifications
- ITU-T Rec. T.82
- ITU-T Rec. T.85 - Defines a subformat ("application profile") of JBIG.
Software
Links
- Wikipedia article
- JBIG Homepage
- JBIG Compression, from the Encyclopedia of Graphics File Formats
