Comment Re:Sure, just like anyone can become president (Score 1) 106
JPEG XL has both true lossless and visually lossless pathways. The former gives 22 % savings over old school JPEG, the latter 65%.
Comment Re:3 letter extensions (Score 1) 106
Computers need to shovel those meaningless bytes back and forth. 100 images times 3 bytes per webpage... I'd propose just .j
Comment Re:We already have webP (Score 1) 106
It is more complex than that. While at highest (camera/art/high level e-commerce) quality old jpeg wins over WebP, at medium and low quality WebP wins with a margin. WebP lossless is a clear winner over other lossless codecs (including avif lossless) until Jpeg xl comes around.
Comment Re:We already have webP (Score 1) 106
JPEG XL design philosophy is built around robustness and least surprise. It should not require the use of flags to get decent performance from the encoder. The format is built in a way that it degrades naturally and consistently - although sharply when you move into the area of verynoticeable differences. The encoder quality parameter defines how many multiples you want of just noticeable difference.
Comment Re:How much better is it... (Score 1) 106
The best research compressors are those built by Alexander Rhatushnyak. http://prize.hutter1.net/
He was also one of the leads of the JPEG XL standardization work: https://arxiv.org/abs/1908.035...
Comment Re:Never? (Score 1) 106
JPEG XL is more efficient than AVIF and HEIF in the medium to high bits-per-pixel and less efficient in the lowest end.
See: https://www.reddit.com/r/AV1/c... for a medium bits-per-pixel example.
I'd never use low bits-per-pixel (0.1 BPP) to publish my images, so I like JPEG XL better. I believe half decent quality with progression is a better compromise for a publisher than going for crappy quality as the only option.
Comment Re:What about AVIF? (Score 1) 106
https://www.reddit.com/r/AV1/c...
JPEG XL is faster to decode (10x?), faster to encode (20x?) and looks quite a lot better. JPEG XL is more compatible with image encoding by having progression, responsive features and support for multi-threaded decoding. AVIF has better SSIM and PSNR scores but looks worse by a hefty margin.
Comment Re:How much better is it... (Score 1) 106
btw, 7zip has the 'brunsli' part of JPEG XL in it's M-filter package.
https://encode.su/threads/15-7...
Submission + - Google publishes Zopfli as open-source compression algorithm (networkworld.com)
alphadogg writes: Google is open-sourcing a new general purpose data compression library called Zopfli that can be used to speed up Web downloads.
The Zopfli Compression Algorithm, which got its name from a Swiss bread recipe, is an implementation of the Deflate compression algorithm that creates a smaller output size compared to previous techniques, wrote Lode Vandevenne, a software engineer with Google's Compression Team, on the Google Open Source Blog on Thursday. "The smaller compressed size allows for better space utilization, faster data transmission, and lower Web page load latencies. Furthermore, the smaller compressed size has additional benefits in mobile use, such as lower data transfer fees and reduced battery use," Vandevenne wrote. http://google-opensource.blogspot.nl/2013/02/compress-data-more-densely-with-zopfli.html The more exhaustive compression techniques used achieve higher data density but also make the compression a lot slower. This does not affect the decompression speed though, Vandenne wrote.
The Zopfli Compression Algorithm, which got its name from a Swiss bread recipe, is an implementation of the Deflate compression algorithm that creates a smaller output size compared to previous techniques, wrote Lode Vandevenne, a software engineer with Google's Compression Team, on the Google Open Source Blog on Thursday. "The smaller compressed size allows for better space utilization, faster data transmission, and lower Web page load latencies. Furthermore, the smaller compressed size has additional benefits in mobile use, such as lower data transfer fees and reduced battery use," Vandevenne wrote. http://google-opensource.blogspot.nl/2013/02/compress-data-more-densely-with-zopfli.html The more exhaustive compression techniques used achieve higher data density but also make the compression a lot slower. This does not affect the decompression speed though, Vandenne wrote.
Comment Re:TFA! Read it! (Score 1) 249
Please mod the parent down, the claim is not correct and not supported by http://code.google.com/speed/webp/docs/webp_lossless_alpha_study.html
Submission + - Google launches a replacement for PNG format (blogspot.com) 1
more writes: Google introduced today a WebP extension to compress translucent images either lossy or losslessly, claiming file size savings of 28 % in the lossless mode and more in the lossy mode.
Submission + - Quantum wavefunction is a real physical object aft (nature.com)
cekerr writes: Nature reports:
Quantum theorem shakes foundations
The wavefunction is a real physical object after all, say researchers.
"... the new paper, by a trio of physicists led by Matthew Pusey at Imperial College London, presents a theorem showing that if a quantum wavefunction were purely a statistical tool, then even quantum states that are unconnected across space and time would be able to communicate with each other. As that seems very unlikely to be true, the researchers conclude that the wavefunction must be physically real after all.
David Wallace, a philosopher of physics at the University of Oxford, UK, says that the theorem is the most important result in the foundations of quantum mechanics that he has seen in his 15-year professional career. “This strips away obscurity and shows you can’t have an interpretation of a quantum state as probabilistic,” he says.
Quantum theorem shakes foundations
The wavefunction is a real physical object after all, say researchers.
"... the new paper, by a trio of physicists led by Matthew Pusey at Imperial College London, presents a theorem showing that if a quantum wavefunction were purely a statistical tool, then even quantum states that are unconnected across space and time would be able to communicate with each other. As that seems very unlikely to be true, the researchers conclude that the wavefunction must be physically real after all.
David Wallace, a philosopher of physics at the University of Oxford, UK, says that the theorem is the most important result in the foundations of quantum mechanics that he has seen in his 15-year professional career. “This strips away obscurity and shows you can’t have an interpretation of a quantum state as probabilistic,” he says.
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