JPEG XT
From Just Solve the File Format Problem
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[[JPEG XT]] is a backward-compatible extension of the [[JPEG]] graphics format. It offers higher bit depths, high dynamic range, lossless and near-lossless compression, and transparency. | [[JPEG XT]] is a backward-compatible extension of the [[JPEG]] graphics format. It offers higher bit depths, high dynamic range, lossless and near-lossless compression, and transparency. | ||
| − | JPEG XT is similar in concept to [[JPEG-HDR]]. Its precise relationship to JPEG-HDR is not clear; the formats appear to be | + | JPEG XT is similar in concept to [[JPEG-HDR]]. Its precise relationship to JPEG-HDR is not clear; the formats do not appear to be compatible. |
| − | + | All the critical parts of the standard were published as of 2016-10-15. | |
== Format details == | == Format details == | ||
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* [http://www.iso.org/iso/catalogue_detail.htm?csnumber=67168 ISO/IEC 18477-6:2016] - Part 6: IDR Integer Coding | * [http://www.iso.org/iso/catalogue_detail.htm?csnumber=67168 ISO/IEC 18477-6:2016] - Part 6: IDR Integer Coding | ||
* [http://www.iso.org/iso/catalogue_detail.htm?csnumber=67169 ISO/IEC 18477-7:2016] - Part 7: HDR Floating-Point Coding | * [http://www.iso.org/iso/catalogue_detail.htm?csnumber=67169 ISO/IEC 18477-7:2016] - Part 7: HDR Floating-Point Coding | ||
| − | * [http://www.iso.org/iso/catalogue_detail.htm?csnumber=68663 ISO/IEC 18477-8] - Part 8: Lossless and Near-lossless Coding | + | * [http://www.iso.org/iso/catalogue_detail.htm?csnumber=68663 ISO/IEC 18477-8:2016] - Part 8: Lossless and Near-lossless Coding |
| − | * [http://www.iso.org/iso/catalogue_detail.htm?csnumber=68664 ISO/IEC 18477-9] - Part 9: Alpha Channel Coding | + | * [http://www.iso.org/iso/catalogue_detail.htm?csnumber=68664 ISO/IEC 18477-9:2016] - Part 9: Alpha Channel Coding |
== Software == | == Software == | ||
Revision as of 12:38, 5 December 2016
JPEG XT is a backward-compatible extension of the JPEG graphics format. It offers higher bit depths, high dynamic range, lossless and near-lossless compression, and transparency.JPEG XT is similar in concept to JPEG-HDR. Its precise relationship to JPEG-HDR is not clear; the formats do not appear to be compatible.
All the critical parts of the standard were published as of 2016-10-15.
Contents |
Format details
Like JPEG-HDR, it uses APP11 segments. Unlike JPEG-HDR, the data in those segments apparently uses boxes/atoms format, with the brand "jpxt".
Specifications
The documents listed here are not necessarily available yet, and if they are, they're probably not free to download.
- ISO/IEC 18477-1:2015 - Part 1: Scalable compression and coding of continuous-tone still images
- ISO/IEC 18477-2:2016 - Part 2: Extensions for high dynamic range images
- ISO/IEC 18477-3:2015 - Part 3: Box file format
- ISO/IEC 18477-4 - Part 4: Conformance testing
- ISO/IEC 18477-5 - Part 5: Reference software
- ISO/IEC 18477-6:2016 - Part 6: IDR Integer Coding
- ISO/IEC 18477-7:2016 - Part 7: HDR Floating-Point Coding
- ISO/IEC 18477-8:2016 - Part 8: Lossless and Near-lossless Coding
- ISO/IEC 18477-9:2016 - Part 9: Alpha Channel Coding
