4 ms·

Do you have a link for this? I tried searching for it but couldn't find any details. Mostly I'm wondering if those numbers include just JPEG or also include oth

Do you have a link for this? I tried searching for it but couldn't find any details. Mostly I'm wondering if those numbers include just JPEG or also include other formats. E.g. including PNG would tend to drag the median / mean up. Also, if sites are currently using 1.0 bpp JPEGs, I can only assume that they'll want to reduce sizes further when switching to a better codec, since 1.0 bpp is quite low for JPEG. Note that there are samples where JPEG XL still has way too many artifacts at e.g. 1.3 bpp: https://afontenot.github.io/image-formats-comparison/#pont-de-quebec&avif=l&jxl=l https://afontenot.github.io/image-formats-comparison/#pont-d... I do agree with you, though, that if a site is targeting 1.0 bpp or more, they're usually going to see better results with JPEG XL than AVIF. > progressive decoding If I'm not mistaken, it isn't enabled by default for JPEG XL and reduces the encoding efficiency by about 10%.

ksec 4y ago
Late to Reply ( It was Chrome, not Cloudflare, which is arguably more representative ) 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 https://www.spiedigitallibrary.org/conference-proceedings-of... Figure 1
- bscphil 4y ago
  > The number of transferred bytes is important because it affects the latency and hence the user experience. Using this estimate, we calculated that between June 1st and 28th, 2019, the average BPP (weighted by the number of bytes transmitted with that BPP) was 2.97, 2.24 and 2.03 for small, medium and large images, respectively. We confirmed that there was no considerable difference between mobile and desktop platforms. This data indicates that image compression algorithms should target rich images with a relatively high BPP values, aiming to produce 1 BPP images almost free of artefacts instead of 0.5 BPP images with artefacts that are not too intrusive. This is excellent, and does indeed suggest that JPEG XL should be broadly preferred in the browser. Thanks for the reference.

ksec 4y ago

Late to Reply ( It was Chrome, not Cloudflare, which is arguably more representative ) 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 https://www.spiedigitallibrary.org/conference-proceedings-of... Figure 1

bscphil 4y ago
> The number of transferred bytes is important because it affects the latency and hence the user experience. Using this estimate, we calculated that between June 1st and 28th, 2019, the average BPP (weighted by the number of bytes transmitted with that BPP) was 2.97, 2.24 and 2.03 for small, medium and large images, respectively. We confirmed that there was no considerable difference between mobile and desktop platforms. This data indicates that image compression algorithms should target rich images with a relatively high BPP values, aiming to produce 1 BPP images almost free of artefacts instead of 0.5 BPP images with artefacts that are not too intrusive. This is excellent, and does indeed suggest that JPEG XL should be broadly preferred in the browser. Thanks for the reference.