JPEG XL

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|mimetypes={{mimetype|image/jxl}}
 
|mimetypes={{mimetype|image/jxl}}
 
|extended from=[[JPEG]], [[PIK]], [[FUIF]]
 
|extended from=[[JPEG]], [[PIK]], [[FUIF]]
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|pronom={{PRONOM|fmt/1484}}, {{PRONOM|fmt/1485}}
 
|magic={{magic|FF 0A}} or {{magic|00 00 00 0C 4A 58 4C 20 0D 0A 87 0A}}
 
|magic={{magic|FF 0A}} or {{magic|00 00 00 0C 4A 58 4C 20 0D 0A 87 0A}}
 
|patent license=Royalty-Free
 
|patent license=Royalty-Free
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== Identification ==
 
== Identification ==
Based on the [https://gitlab.com/wg1/jpeg-xl/-/blob/master/jxl/dec_file.cc reference implementation], JPEG XL codestreams start with bytes {{magic|ff 0a}}.
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Based on the [https://gitlab.com/wg1/jpeg-xl/-/blob/master/lib/jxl/decode.cc reference implementation], JPEG XL codestreams start with bytes {{magic|ff 0a}}.
Codestreams may also be wrapped in an ISOBMFF-based file format ([https://gitlab.com/wg1/jpeg-xl/-/blob/master/tools/box/box.cc implementation]).
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Codestreams may also be wrapped in an ISOBMFF-based file format ([https://gitlab.com/wg1/jpeg-xl/-/blob/master/tools/box/box.cc implementation]). See [https://gitlab.com/wg1/jpeg-xl/-/blob/main/doc/format_overview.md format overview].
  
 
== Specifications ==
 
== Specifications ==
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== Software ==
 
== Software ==
 
* [https://gitlab.com/wg1/jpeg-xl Open-source reference software]
 
* [https://gitlab.com/wg1/jpeg-xl Open-source reference software]
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* [https://jpegxl-converter.com/ Online converter to JXL]
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* [https://www.reddit.com/r/jpegxl/comments/qcd0ao/gimp_3_to_support_jpeg_xl/ GIMP Support]
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== Sample files ==
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* https://telparia.com/fileFormatSamples/image/jpegXL/
  
 
== Links ==
 
== Links ==
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* [https://doi.org/10.1117/12.2556264 Benchmarking JPEG XL image compression]
 
* [https://doi.org/10.1117/12.2556264 Benchmarking JPEG XL image compression]
 
* [https://cloudinary.com/blog/how_jpeg_xl_compares_to_other_image_codecs How JPEG XL Compares to Other Image Codecs] (2020-05-26)
 
* [https://cloudinary.com/blog/how_jpeg_xl_compares_to_other_image_codecs How JPEG XL Compares to Other Image Codecs] (2020-05-26)
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* [https://github.com/exiftool/exiftool/issues/77 Codestream vs Container discussion]
  
 
[[Category:JPEG (organization)]]
 
[[Category:JPEG (organization)]]
 
[[Category:JPEG]]
 
[[Category:JPEG]]
 
[[Category:Box file format]]
 
[[Category:Box file format]]

Revision as of 18:45, 10 November 2021

File Format
Name JPEG XL
Ontology
Extension(s) .jxl
MIME Type(s) image/jxl
PRONOM fmt/1484, fmt/1485
Extended From [[JPEG, PIK, FUIF]]
Magic Bytes FF 0A or 00 00 00 0C 4A 58 4C 20 0D 0A 87 0A
Patent License Royalty-Free
Released 2021

JPEG XL is a compressed image format and/or file format that is yet another attempt to be the next JPEG. It was first announced around 2017-08. It is expected to be published as ISO/IEC 18181.

JPEG XL is based in part on the FUIF and PIK formats.[1] The standard also supports recompression of JPEG files with bit-exact reconstruction.

Contents

Identification

Based on the reference implementation, JPEG XL codestreams start with bytes ff 0a. Codestreams may also be wrapped in an ISOBMFF-based file format (implementation). See format overview.

Specifications

Software

Sample files

Links

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