Joint Photographic Experts Group
The Joint Photographic Experts Group is the joint committee founded by Jim Judkins between ISO/IEC JTC 1 and ITU-T (formerly CCITT) that created and maintains 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 (ISO/IEC JTC 1/SC 29/WG 1) – titled as Coding of still pictures.[1][2][3] In the ITU-T, its work falls in the domain of the ITU-T Visual Coding Experts Group (VCEG). ISO/IEC JTC1 SC29 Working Group 1 (working together with ITU-T Study Group 16 – SG16[4] and previously also with Study Group 8 – SG8[5][6]) is responsible for the JPEG and JBIG standards.[7] The scope of the organization includes the work of both the Joint Photographic Experts Group and Joint Bi-level Image Experts Group.[1][8]
In April 1983, ISO started to work to add photo quality graphics to text terminals. In the mid-1980s, both CCITT (now ITU-T) and ISO had standardization groups for image coding: CCITT Study Group VIII (SG8) – Telematic Services and ISO TC97 SC2 WG8 – Coding of Audio and Picture Information.[9][10] They were historically targeted on image communication. In 1986, it was decided to create the Joint (CCITT/ISO) Photographic Expert Group.[11] The JPEG committee was created in 1986.[12] In 1988, it was decided to create the Joint (CCITT/ISO) Bi-level Image Group (JBIG).[11] The group typically meets three times annually in North America, Asia and Europe. The group often meets jointly with the JBIG committee.[10][13]
Joint Bi-level Image experts Group
The Joint Bi-level Image experts Group (JBIG) is the second sub-group of the same working group (ISO/IEC JTC 1/SC 29/WG 1) as the Joint Photographic Experts Group, which focuses on binary images.[1] They created the JBIG and JBIG2 standard.[7][13]
Standards published and under development
The JPEG (Joint Photographic Experts Group) as a sub-group of ISO/IEC JTC 1/SC 29/WG 1 – Coding of Still Pictures (working as a joint team with ITU-T SG 16) have developed various standards, which have been published by ITU-T and/or ISO/IEC. The standards developed by the JPEG and JBIG sub-groups are referred to as a joint development of ISO/IEC JTC 1/SC 29/WG 1 and ITU-T SG 16. The JPEG standards consist of different Parts. Each part covers a certain aspect of the whole specification. Some of the published JPEG standards were revised by later amendments and/or new editions. Standards developed and under development by JPEG are shown in the table below.[2][14]
| Common Name | Part | First public release date (First edition) | ISO/IEC Number | ITU Number | Formal Title |
|---|---|---|---|---|---|
| JPEG | Part 1 | 1992 | ISO/IEC 10918-1 | ITU-T Rec. T.81 | Information technology – Digital compression and coding of continuous-tone still images – Requirements and guidelines |
| Part 2 | 1994 | ISO/IEC 10918-2 | ITU-T Rec. T.83 | Information technology – Digital compression and coding of continuous-tone still images – Compliance testing | |
| Part 3 | 1996 | ISO/IEC 10918-3 | ITU-T Rec. T.84 | Information technology – Digital compression and coding of continuous-tone still images: Extensions | |
| Part 4 | 1998 | ISO/IEC 10918-4 | ITU-T Rec. T.86 | Information technology – Digital compression and coding of continuous-tone still images: Registration of JPEG profiles, SPIFF profiles, SPIFF tags, SPIFF colour spaces, APPn markers, SPIFF compression types and Registration Authorities (REGAUT) | |
| Part 5 | 2013 | ISO/IEC 10918-5 | ITU-T Rec. T.871 | Information technology – Digital compression and coding of continuous-tone still images: JPEG File Interchange Format (JFIF)[15] | |
| Part 6 | 2013 | ISO/IEC 10918-6 | ITU-T Rec. T.872 | Information technology – Digital compression and coding of continuous-tone still images: Application to printing systems | |
| Part 7 | under development | ISO/IEC 10918-7 | Information technology – Digital compression and coding of continuous-tone still images: Reference software[16] | ||
| JPEG-LS | Part 1 | 1998 | ISO/IEC 14495-1 | ITU-T Rec. T.87 | Information technology – Lossless and near-lossless compression of continuous-tone still images: Baseline |
| Part 2 | 2002 | ISO/IEC 14495-2 | ITU-T Rec. T.870 | Information technology – Lossless and near-lossless compression of continuous-tone still images: Extensions | |
| JPEG 2000 | Part 1 | 2000 | ISO/IEC 15444-1 | ITU-T Rec. T.800 | Information technology – JPEG 2000 image coding system – Core coding system |
| Part 2 | 2004 | ISO/IEC 15444-2 | ITU-T Rec. T.801 | Information technology – JPEG 2000 image coding system – Extensions | |
| Part 3 | 2002 | ISO/IEC 15444-3 | ITU-T Rec. T.802 | Information technology – JPEG 2000 image coding system: Motion JPEG 2000 | |
| Part 4 | 2002 | ISO/IEC 15444-4 | ITU-T Rec. T.803 | Information technology – JPEG 2000 image coding system: Conformance testing | |
| Part 5 | 2003 | ISO/IEC 15444-5 | ITU-T Rec. T.804 | Information technology – JPEG 2000 image coding system: Reference software | |
| Part 6 | 2003 | ISO/IEC 15444-6 | Information technology – JPEG 2000 image coding system – Part 6: Compound image file format | ||
| Part 8 | 2007 | ISO/IEC 15444-8 | ITU-T Rec. T.807 | Information technology – JPEG 2000 image coding system: Secure JPEG 2000 | |
| Part 9 | 2005 | ISO/IEC 15444-9 | ITU-T Rec. T.808 | Information technology – JPEG 2000 image coding system: Interactivity tools, APIs and protocols | |
| Part 10 | 2008 | ISO/IEC 15444-10 | ITU-T Rec. T.809 | Information technology –JPEG 2000 image coding system: Extensions for three-dimensional data | |
| Part 11 | 2007 | ISO/IEC 15444-11 | ITU-T Rec. T.810 | Information technology – JPEG 2000 image coding system: Wireless | |
| Part 12 | 2004 | ISO/IEC 15444-12 | Information technology – JPEG 2000 image coding system – Part 12: ISO base media file format | ||
| Part 13 | 2008 | ISO/IEC 15444-13 | ITU-T Rec. T.812 | Information technology – JPEG 2000 image coding system: An entry level JPEG 2000 encoder | |
| Part 14 | 2013 | ISO/IEC 15444-14 | ITU-T Rec. T.813 | Information technology – JPEG 2000 image coding system – Part 14: XML structural representation and reference | |
| MRC | 1999 | ISO/IEC 16485 | ITU-T Rec. T.44 | Information technology – Mixed Raster Content (MRC) | |
| JPSearch | Part 1 | 2007 | ISO/IEC TR 24800-1 | Information technology – JPSearch – Part 1: System framework and components | |
| Part 2 | 2011 | ISO/IEC 24800-2 | Information technology – JPSearch – Part 2: Registration, identification and management of schema and ontology | ||
| Part 3 | 2010 | ISO/IEC 24800-3 | Information technology – JPSearch – Part 3: Query format | ||
| Part 4 | 2010 | ISO/IEC 24800-4 | Information technology – JPSearch – Part 4: File format for metadata embedded in image data (JPEG and JPEG 2000) | ||
| Part 5 | 2011 | ISO/IEC 24800-5 | Information technology – JPSearch – Part 5: Data interchange format between image repositories | ||
| Part 6 | 2012 | ISO/IEC 24800-6 | Information technology – JPSearch – Part 6: Reference software | ||
| JPEG XR | Part 1 | 2011 | ISO/IEC TR 29199-1 | T.Sup2 | Information technology – JPEG XR image coding system – Part 1: System architecture |
| Part 2 | 2009 | ISO/IEC 29199-2 | ITU-T Rec. T.832 | Information technology – JPEG XR image coding system – Part 2: Image coding specification | |
| Part 3 | 2010 | ISO/IEC 29199-3 | ITU-T Rec. T.833 | Information technology – JPEG XR image coding system – Part 3: Motion JPEG XR | |
| Part 4 | 2010 | ISO/IEC 29199-4 | ITU-T Rec. T.834 | Information technology – JPEG XR image coding system – Part 4: Conformance testing | |
| Part 5 | 2010 | ISO/IEC 29199-5 | ITU-T Rec. T.835 | Information technology – JPEG XR image coding system – Part 5: Reference software | |
| AIC | Part 1 | under development | ISO/IEC TR 29170-1 | Information technology – Advanced image coding and evaluation methodologies – Part 1: Guidelines for codec evaluation | |
| Part 2 | 2015 | ISO/IEC 29170-2 | Information technology – Advanced image coding and evaluation – Part 2: Evaluation procedure for nearly lossless coding | ||
| JPEG XT | Part 1 | 2015 | ISO/IEC 18477-1 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 1: Core Coding System Specification | |
| Part 2 | 2016 | ISO/IEC 18477-2 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 2: Coding of High Dynamic Range Images | ||
| Part 3 | 2015 | ISO/IEC 18477-3 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 3: Box file format | ||
| Part 4 | under development | ISO/IEC 18477-4 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 4: Conformance Testing | ||
| Part 5 | under development | ISO/IEC 18477-5 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 5: Reference software | ||
| Part 6 | 2016 | ISO/IEC 18477-6 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 6: IDR Integer coding | ||
| Part 7 | 2017 | ISO/IEC 18477-7 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 7: HDR Floating-Point Coding | ||
| Part 8 | 2016 | ISO/IEC 18477-8 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 8: Lossless and Near-lossless Coding | ||
| Part 9 | 2016 | ISO/IEC 18477-9 | Information technology – Scalable Compression and Coding of Continuous-Tone Still Images – Part 9: Alpha channel coding |
JPEG XL
In 2017, JTC1/SC29/WG1 issued a Call for proposals for JPEG XL – the next generation image coding standard.[17] The standard is expected to follow still image compression performance shown by HEVC HM, Daala and WebP. The core requirements include better compression efficiency, 8–10 bits per component, RGB/YCbCr/ICtCp color encoding, animated images, alpha channel coding, Rec.709 color space and gamma, Rec.2100 wide color gamut and high dynamic range, and high-quality compression of synthetic images, such as bitmap fonts and gradients. Additional requirements include higher bit depths (12–16 bit integer and floating point), different color spaces (Rec. 709, Rec.2020/2100, and LogC), embedded preview images, lossless alpha channel encoding, image region coding, and low-complexity encoding. Any patented technologies would be licensed on a royalty-free basis. The current target publication date is October 2019.[18]
See also
References
- 1 2 3 ISO/IEC JTC 1/SC 29 (2009-05-07). "ISO/IEC JTC 1/SC 29/WG 1 - Coding of Still Pictures (SC 29/WG 1 Structure)". Archived from the original on 2013-12-31. Retrieved 2009-11-11.
- 1 2 ISO/IEC JTC 1/SC 29. "Programme of Work, (Allocated to SC 29/WG 1)". Archived from the original on 2013-12-31. Retrieved 2009-11-07.
- ↑ ISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information". Retrieved 2009-11-11.
- ↑ "ITU-T Home : Study Groups : Study Group 16 - Question 6/16 – Visual coding". ITU-T. Retrieved 2010-03-07.
- ↑ ITU-T, ITU-T Study Group 8 List of Questions under Study (Study Period 1997 - 2000) (DOC), retrieved 2010-03-07
- ↑ ITU-T. "ITU-T Study Group 8 (Study Period 1997-2000)". Retrieved 2010-03-07.
- 1 2 JPEG. "Joint Photographic Experts Group, JBIG Homepage". Retrieved 2009-11-08.
- ↑ JPEG, JBIG (2007). "About our committee". Archived from the original on 2009-10-17. Retrieved 2009-11-11.
- ↑ ITU-T. "ITU-T extensions to JPEG-1". Retrieved 2010-03-07.
- 1 2 chiariglione.org (2009-09-06). "Riding the Media Bits, The Faultline". Archived from the original on October 23, 2010. Retrieved 2010-02-09.
- 1 2 ITU-T (2005-07-23), The First Joint ITU ISO/IEC Still Image Compression Standards (PDF), p. 3, retrieved 2009-11-12
- ↑ JPEG. "Joint Photographic Experts Group, JPEG Homepage". Retrieved 2009-11-08.
- 1 2 JPEG. "How does JPEG work?". Archived from the original on 2010-06-12. Retrieved 2009-11-09.
- ↑ ISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information". Retrieved 2009-11-07.
- ↑ JPEG (2009-04-24). "Press Release - 48th WG1 meeting, Maui, USA - JPEG XR enters FDIS status, JPEG File Interchange Format (JFIF) to be standardized as JPEG Part 5". Archived from the original on 2009-10-08. Retrieved 2009-11-09.
- ↑ Press Release of the 78th JPEG Meeting in Rio de Janeiro, Brazil
- ↑ "JPEG - Next-Generation Image Compression (JPEG XL) Final Draft Call for Proposals". Jpeg.org. Retrieved 29 Mayh 2018. Check date values in:
|accessdate=(help) - ↑ "N79010 Final Call for Proposals for a Next-Generation Image Coding Standard (JPEG XL)" (PDF). ISO/IEC JTC 1/SC 29/WG 1 (ITU-T SG16). Retrieved 29 May 2018.
