JPEG: Difference between revisions

JPEG XL (ISO/IEC 18181) was published in 2021&ndash;2022. It replaces the JPEG format with a new DCT-based [[royalty-free]] format and allows efficient transcoding as a storage option for traditional JPEG images.<ref name=spie_jpegxl>{{cite book|chapter=JPEG XL next-generation image compression architecture and coding tools|chapter-url=https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11137/111370K/JPEG-XL-next-generation-image-compression-architecture-and-coding-tools/10.1117/12.2529237.full?SSO=1|first1=Jyrki|last1=Alakuijala|first2=Ruud|last2=van Asseldonk|first3=Sami|last3=Boukortt|first4=Martin|last4=Bruse|first5=Iulia-Maria|last5=Comșa|first6=Moritz|last6=Firsching|first7=Thomas|last7=Fischbacher|first8=Evgenii|last8=Kliuchnikov|first9=Sebastian|last9=Gomez|first10=Robert|last10=Obryk|first11=Krzysztof|last11=Potempa|first12=Alexander|last12=Rhatushnyak|first13=Jon|last13=Sneyers|first14=Zoltan|last14=Szabadka|first15=Lode|last15=Vandervenne|first16=Luca|last16=Versari|first17=Jan|last17=Wassenberg|editor1-first=Andrew G|editor1-last=Tescher|editor2-first=Touradj|editor2-last=Ebrahimi|title=Applications of Digital Image Processing XLII|date=2019-09-06| volume=11137 |page=20|doi=10.1117/12.2529237|bibcode=2019SPIE11137E..0KA|isbn=978-1-5106-2967-7|s2cid=202785129|access-date=2021-12-26|archive-date=2021-12-26|archive-url=https://web.archive.org/web/20211226010413/https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11137/111370K/JPEG-XL-next-generation-image-compression-architecture-and-coding-tools/10.1117/12.2529237.full?SSO=1|url-status=live}}</ref> The new format is designed to exceed the still image compression performance shown by [[HEVCHEIC]] HM, [[Daala]] and [[WebP]]. It supports billion-by-billion pixel images, up to 32-bit-per-component [[high dynamic range]] with the appropriate transfer functions ([[Perceptual quantizer|PQ]] and [[Hybrid log–gamma|HLG]]), patch encoding of synthetic images such as bitmap fonts and gradients, animated images, alpha channel coding, and a choice of RGB/YCbCr/[[ICtCp]] color encoding.<ref name="jpegxl_committeedraft">{{cite arXiv|title=Committee Draft of JPEG XL Image Coding System|eprint = 1908.03565|last1 = Rhatushnyak|first1 = Alexander|last2 = Wassenberg|first2 = Jan|last3 = Sneyers|first3 = Jon|last4 = Alakuijala|first4 = Jyrki|last5 = Vandevenne|first5 = Lode|last6 = Versari|first6 = Luca|last7 = Obryk|first7 = Robert|last8 = Szabadka|first8 = Zoltan|last9 = Kliuchnikov|first9 = Evgenii|last10 = Comsa|first10 = Iulia-Maria|last11 = Potempa|first11 = Krzysztof|last12 = Bruse|first12 = Martin|last13 = Firsching|first13 = Moritz|last14 = Khasanova|first14 = Renata|author15 = Ruud van Asseldonk|last16 = Boukortt|first16 = Sami|last17 = Gomez|first17 = Sebastian|last18 = Fischbacher|first18 = Thomas|class = eess.IV|year = 2019}}</ref><ref name="jpegxl_cfp">{{cite web|url=https://jpeg.org/downloads/jpegxl/jpegxl-cfp.pdf|title=N79010 Final Call for Proposals for a Next-Generation Image Coding Standard (JPEG XL)|work=ISO/IEC JTC 1/SC 29/WG 1 (ITU-T SG16)|access-date=29 May 2018|archive-date=31 October 2022|archive-url=https://web.archive.org/web/20221031184400/https://jpeg.org/downloads/jpegxl/jpegxl-cfp.pdf|url-status=live}}</ref><ref>{{Cite ISO standard |title=ISO/IEC 18181-1:2022 Information technology — JPEG XL image coding system — Part 1: Core coding system |csnumber=77977 }}</ref><ref>{{Cite ISO standard |title=ISO/IEC 18181-2:2021 Information technology — JPEG XL image coding system — Part 2: File format |csnumber=80617 }}</ref>