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  • Apr 19 22:52
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  • Jan 07 21:17
    charun80 opened #559
  • Nov 20 2020 07:22
    linrio opened #558
  • Nov 11 2020 09:24
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  • Jul 10 2020 14:29
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  • Jul 10 2020 14:23

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    Notice for JPEG XL Merge pull request #554 from sa… (compare)

  • Jul 10 2020 14:23
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  • Jul 10 2020 14:23
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  • Jul 10 2020 14:21
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Jon Sneyers
@jonsneyers
basically everything after page 135 should be removed in my opinion, but I'm having a hard time convincing the Google team :)
I want to keep Brotli, ANS and ABRAC.
Zoey Riordan
@ZoeyR
well at the very least I'll reserve the rust crate name so no one else poaches it
Jon Sneyers
@jonsneyers
(MABEGABRAC is basically the same thing as MANIAC, by the way)
The Jared Wilcurt
@TheJaredWilcurt
:tada:
This is good progress
mo0nsniper
@mo0nsniper
How is the compression from PIK used in Jpeg XL? In FUIF I understand that the same algorithm is used both for Loossless and Lossy compression.
Jon Sneyers
@jonsneyers
JPEG XL (at least the current version of the spec) has 4 modes, which basically correspond to pik-lossy, pik-lossless, fuif, brunsli
Andrew Kvapil
@viluon
Hi, pardon the question, but is FLIF dead?
The Jared Wilcurt
@TheJaredWilcurt
@viluon FLIF is a filetype. There are tools to convert from other file types to it, and tools to view those files. It is open source so anyone can contribute to it to improve it, or create their own encoding/decoding tools based on the spec and existing source code.
Active development efforts seem to have moved from it to FUIF and JPEG XL, which will have FUIF essentially built in, and FUIF has many ideas that are taken from FLIF
aeriksen
@aeriksen
UGUI_FLIF doesn't seem to do anything. Running on MacOS
aeriksen
@aeriksen
https://u.teknik.io/CSt4P.png
It doesn't convert
Andrew Kvapil
@viluon
@TheJaredWilcurt yes, it is these active development efforts that I was talking about.
TobiasKnauss
@TobiasKnauss
any news regarding the standardization of JPEG XL and a demo implementation?
cathugger
@cathugger
https://gitlab.com/wg1/jpeg-xl
The Jared Wilcurt
@TheJaredWilcurt
Hype
Neil Sandage anagram"Nile_EdenAgs" Hamilton+Sandys
@NEdenags_twitter
I want to replace JPEG, since FLIF is better than JPEG, how soon Fuji Camera, and Replace Motion JPEG aka MPEG video? ~ any guess about h.264 h.265 or VC1 or my favorite Matroska
The Jared Wilcurt
@TheJaredWilcurt
@NEdenags_twitter All of the good ideas from FLIF and FUIF are being added into JPEG-XL.
Jon Sneyers
@jonsneyers
JPEG XL will have slightly better lossless compression than FLIF, and it will decode about twice as fast on single-core and be parallelizable. Lossless encode is still rather slow atm, we still need to improve that.
We took MANIAC from FLIF, turned it into MA-ANS, and made it significantly more powerful: it also does lz77-style references, it has a predictor and multiplier per MA context, and more predictors and MA properties.
Jon Sneyers
@jonsneyers
The FLIF/FUIF-based mode in JPEG XL is called "Modular mode", and it is used for various things: lossless mode, the DC (1:8 image) in lossy mode, alpha and other extra channels, and all kinds of internal auxiliary images in lossy mode (the adaptive quantization map, block type selection map, chroma from luma coefficients, custom quantization tables, filter strength maps).
Version 0.1 was released last week. Plan is to reach 0.2 soon (bw-compatible bitstream), then 0.3 (stable libjxl api) by January, and hopefully we can get in the next Android and in Chrome somewhere in 2021.
The Jared Wilcurt
@TheJaredWilcurt
omg :heart: :heart: :heart: :heart: :heart: :heart:
this is extremely exciting
Jon Sneyers
@jonsneyers
https://cloudinary.com/blog/what_to_focus_on_in_image_compression_fidelity_or_appeal
Also: 0.2 was released last week, bitstream is frozen!
The Jared Wilcurt
@TheJaredWilcurt
:tada:
Jon Sneyers
@jonsneyers
Started a discord to chat about jxl: https://discord.gg/SXCFtcK8bw
Jon Sneyers
@jonsneyers
Here is a better link: https://discord.gg/DqkQgDRTFu