JPEG XL: Next-Generation of Image Format for the Internet [video] (opens in new tab)

(youtube.com)

7 pointsundecidabot6y ago3 comments

3 comments

undecidabotOP6y ago

Slides: https://www.slideshare.net/cloudinarymarketing/imagecon-2019...

Background: JPEG XL is a combination of Cloudinary's FUIF [1] (successor of FLIF [2]) and Google's Pik [3].

Committee Draft (Aug 2019): https://arxiv.org/abs/1908.03565

Technical Details: https://www.spiedigitallibrary.org/conference-proceedings-of...

Features / Goals:

- high quality compression (> 60% over JPEG-1)

- royalty-free with open source implementations available from the start

- versatile: supports alpha transparency, high bit depth (16-bit), lossless compression, animations

- progressive decoding / "responsive by design"

- legacy-friendly: reversible transcoding of JPEGs with 22% size reduction (demo available [4])

Comparisons:

- JPEG 2000, JPEG XR: only marginal compression improvements

- WebP: limited (8-bit, 4:2:0), no progressive decoding

- BPG/HEIF (HEVC): patent-encumbered (not royalty-free), no progressive decoding, complex

- AVIF (AV1): no progressive decoding, complex, slow?

[1] https://cloudinary.com/blog/introducing_fuif_responsive_imag...

[2] http://flif.info/

[3] https://github.com/google/pik

[4] https://google.github.io/brunsli/

ksec6y ago

From the video I was expecting even higher compression than HEIF, but > 60% over JPEG-1 seems to be about the same as HEIF.

And what are the downside? Whenever something sounds too good to be true it often means we are overlooking something.

JyrkiAlakuijala6y ago

There is a Japanese independent (simple) comparison between av1, bpg, WebP and pik for use in photo compression. Pik won it. JPEG XL is an improved from pik.

https://qiita.com/fg11894

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