JBIG

Infobox file format
name = JBIG
icon =
extension = .jbg, .jbig
mime = image/jbig
type code =
creatorcode =
owner = ISO, IEC, ITU-T
genre = Image file formats
containerfor =
containedby =
extendedfrom =
extendedto = JBIG2

JBIG is a lossless image compression standard from the Joint Bi-level Image Experts Group, standardized as ISO/IEC standard 11544 and as ITU-T recommendation T.82. Now that the newer bi-level image compression standard JBIG2 has been released, JBIG is also known as JBIG1. JBIG was designed for compression of binary images, particularly for faxes, but can also be used on other images. In most situations JBIG offers between a 20% and 50% increase in compression efficiency over the Fax Group 4 standard, and in some situations, it offers a 30-fold improvement.

JBIG uses a form of arithmetic coding patented by IBM known as the Q-coder. It bases the probabilities of each bit on the previous bits and the previous lines of the picture. In order to allow compressing and decompressing images in scanning order, it does not reference future bits. JBIG also supports progressive transmission with small (around 5%) overheads.

External links

* [http://www.cl.cam.ac.uk/~mgk25/jbigkit/ JBIG-KIT] – a free C implementation of the JBIG encoder and decoder


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • JBIG — ist ein Standard für ein verlustfreies Kompressionsverfahren von digitalen Bildern. Die Abkürzung ist ein Akronym der Herausgebergruppe Joint Bi level Image Experts Group, die ein Teil der für das JPEG Verfahren verantwortlich zeichnenden Joint… …   Deutsch Wikipedia

  • JBIG —   [Abk. für engl. Joint Bi Level Image Experts Group, dt. »vereinigte Expertengruppe für zweistufige Bilder«], ein Expertengremium, das sich u. a. mit der Kompression zweifarbiger Bildvorlagen beschäftigt. Der JBIG Standard wurde besonders für… …   Universal-Lexikon

  • JBIG — Это заготовка статьи о компьютерах. Вы можете помочь проекту, исправив и дополнив её. Это примечание по возможности следует заменить более точным. JBIG  это стандарт сжатия изображений без потерь …   Википедия

  • JBIG —   Sigles d’une seule lettre   Sigles de deux lettres   Sigles de trois lettres > Sigles de quatre lettres   Sigles de cinq lettres   Sigles de six lettres   Sigles de sept… …   Wikipédia en Français

  • JBIG — ● ►en sg. np. m. ►ORG►NORM Joint Bi level Image experts Group. Groupe d experts provenant de divers organismes officiels de normalisation et dont le travail consiste à normaliser la compression d images bi level. Le nom officiel du groupe est l… …   Dictionnaire d'informatique francophone

  • JBIG — Joint Bilevel Image Group Bitmap graphics (1 bit raster image) (Computing » File Extensions) …   Abbreviations dictionary

  • JBIG — Joint Bilevel Image compression expert Group …   Acronyms

  • JBIG — Joint Bilevel Image compression expert Group …   Acronyms von A bis Z

  • JBIG —    In digital imaging, an international compression standard designed for images with very little color or gray scale, such as images of document pages …   Glossary of Art Terms

  • JBIG —    Joint Bi level Image experts Group. A proposed standard for the compression of grayscale images. Uses the same arithmetic estimation algorthms (called the QM Coder) as JPEG …   IT glossary of terms, acronyms and abbreviations

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”