Joint Bi-level Image Experts Group
Encyclopedia
The Joint Bi-level Image Experts Group (JBIG) is a group of experts nominated by national standards bodies and major companies to work to produce standards for bi-level image
coding. The 'joint' refers to its status as a committee working on both ISO
and ITU-T
standards. It is one of two sub-groups of ISO
/IEC
Joint Technical Committee 1, Subcommittee 29, Working Group 1 (ISO/IEC JTC 1/SC 29/WG 1), whose official title is Coding of still pictures.
The Joint Bi-level Image Experts Group created the JBIG
and JBIG2
standards. The group often meets jointly with the JPEG committee, which typically meets three times annually.
ISO/IEC JTC1
SC29 Working Group 1 (working together with ITU-T Study Group 16 - VCEG
and previously also with Study Group 8 - SG8) is responsible for both JPEG
and JBIG standards. It includes two sub-groups: the Joint Photographic Experts Group
(JPEG SG) and the Joint Bi-level Image experts Group (JBIG SG).
In the mid 1980s, both CCITT (now ITU-T) and ISO had standardization groups for image coding: CCITT Study Group (SG) VIII (Telematic Services) and ISO TC97 SC2 WG8 (Coding of Audio and Picture Information). They were historically targeted on image communication. In 1986 it was decided to create the Joint (CCITT/ISO) Photographic Expert Group. In 1988 it was decided to create the Joint (CCITT/ISO) Bi-level Image Group - JBIG.
Note: The published JBIG2 standard was revised by later amendments.
Binary image
A binary image is a digital image that has only two possible values for each pixel. Typically the two colors used for a binary image are black and white though any two colors can be used. The color used for the object in the image is the foreground color while the rest of the image is the...
coding. The 'joint' refers to its status as a committee working on both ISO
International Organization for Standardization
The International Organization for Standardization , widely known as ISO, is an international standard-setting body composed of representatives from various national standards organizations. Founded on February 23, 1947, the organization promulgates worldwide proprietary, industrial and commercial...
and ITU-T
ITU-T
The ITU Telecommunication Standardization Sector is one of the three sectors of the International Telecommunication Union ; it coordinates standards for telecommunications....
standards. It is one of two sub-groups of ISO
International Organization for Standardization
The International Organization for Standardization , widely known as ISO, is an international standard-setting body composed of representatives from various national standards organizations. Founded on February 23, 1947, the organization promulgates worldwide proprietary, industrial and commercial...
/IEC
International Electrotechnical Commission
The International Electrotechnical Commission is a non-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology"...
Joint Technical Committee 1, Subcommittee 29, Working Group 1 (ISO/IEC JTC 1/SC 29/WG 1), whose official title is Coding of still pictures.
The Joint Bi-level Image Experts Group created the JBIG
JBIG
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. It is widely implemented in fax machines. Now that the newer bi-level image compression standard JBIG2 has been released, JBIG is also...
and JBIG2
JBIG2
JBIG2 is an image compression standard for bi-level images, developed by the Joint Bi-level Image Experts Group. It is suitable for both lossless and lossy compression...
standards. The group often meets jointly with the JPEG committee, which typically meets three times annually.
ISO/IEC JTC1
ISO/IEC JTC1
ISO/IEC JTC 1 is Joint Technical Committee 1 of the International Organization for Standardization and the International Electrotechnical Commission . It deals with all matters of information technology....
SC29 Working Group 1 (working together with ITU-T Study Group 16 - VCEG
VCEG
The Video Coding Experts Group or Visual Coding Experts Group is the informal name of Question 6 of Working Party 3 of Study Group 16 of the ITU-T. Its abbreviated title is ITU-T Q.6/SG 16...
and previously also with Study Group 8 - SG8) is responsible for both JPEG
JPEG
In computing, JPEG . The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality....
and JBIG standards. It includes two sub-groups: the Joint Photographic Experts Group
Joint Photographic Experts Group
The Joint Photographic Experts Group is the joint committee between ISO/IEC JTC1 and ITU-T that created the JPEG, JPEG 2000, and JPEG XR standards. It is one of two sub-groups of ISO/IEC Joint Technical Committee 1, Subcommittee 29, Working Group 1 - titled as Coding of still pictures...
(JPEG SG) and the Joint Bi-level Image experts Group (JBIG SG).
In the mid 1980s, both CCITT (now ITU-T) and ISO had standardization groups for image coding: CCITT Study Group (SG) VIII (Telematic Services) and ISO TC97 SC2 WG8 (Coding of Audio and Picture Information). They were historically targeted on image communication. In 1986 it was decided to create the Joint (CCITT/ISO) Photographic Expert Group. In 1988 it was decided to create the Joint (CCITT/ISO) Bi-level Image Group - JBIG.
Published Standards
JBIG have developed following standards, which were published by ISO/IEC and/or ITU-T:| Common Name | Part | First public release date (First edition) | ISO/IEC Number | ITU Number | Formal Title |
|---|---|---|---|---|---|
| JBIG1 | 1993 | ISO/IEC 11544 | ITU-T Recommendations T.82, T.85 | Information technology -- Coded representation of picture and audio information -- Progressive bi-level image compression | |
| JBIG2 JBIG2 JBIG2 is an image compression standard for bi-level images, developed by the Joint Bi-level Image Experts Group. It is suitable for both lossless and lossy compression... |
2000 | ISO/IEC 14492 | ITU-T Recommendations T.88, T.89 | Information technology – Lossy/lossless coding of bi-level images |
Note: The published JBIG2 standard was revised by later amendments.