Even - are you aware of the work at ISO/IEC (JTC 1/SC 1 & 2) to bring JPEG XL into HEIC files? It would be good to align those two efforts, since in both cases they are using JXL code streams within a larger container format.
Leonard From: Tiff <[email protected]> on behalf of Even Rouault via Tiff <[email protected]> Date: Saturday, November 29, 2025 at 6:55 AM To: Bob Friesenhahn <[email protected]>, Romeyke, Andreas <[email protected]>, '[email protected]' <[email protected]> Subject: Re: [Tiff] Overview of supported/registered compression mode? Anybody working on FFV1 or QOI support? EXTERNAL: Use caution when clicking on links or opening attachments. Hi, GDAL has a TIFF JPEG-XL codec at https://github.com/OSGeo/gdal/blob/master/frmts/gtiff/tif_jxl.c<https://github.com/OSGeo/gdal/blob/master/frmts/gtiff/tif_jxl.c> relying on libjxl. I'll likely submit it to libtiff upstream some day. I had been waiting for libjxl to go to the 1.0 milestone for that for now. Even Le 28/11/2025 à 15:32, Bob Friesenhahn via Tiff a écrit : > I have not heard of anyone working on QOI or FFV1 compression in > libtiff. If the work is performed suitably well (according to project > standards) and there is some assurance of continued support, the usage > license matches libtiff's license, and there is some assurance of > development support for some time after integration, the work is > likely to be integrated. > > The performance of compression in libtiff is rather dependent on > strip/tile sizes. Have you investigated modifying strip/tile sizes to > see if more can be gained from existing codecs? > > Have you tried WebP compression in libtiff? There is lossless WebP > support in libtiff! WebP compression should work rather well provided > that the image is a natural scene. WebP does not support large > images, but it should work well if a large image is diced up into tiles. > > Bob > > On 11/28/25 08:01, Romeyke, Andreas via Tiff wrote: >> >> Hi, >> >> For our long-term archive, we are considering switching from baseline >> TIFF 6.0 to a successor format that can efficiently compress images >> losslessly. To minimize conversion issues, one option would be to >> simply change the codec within TIFF. We've seen that "tiffcp" >> supports lzw, lzma, and zstd. >> >> Compared to the lossless encoding in Quite OK Image File Format >> (qoi), PNG, and especially compared to FFV1 or JPEG XL, the >> achievable compression rates are suboptimal[1]. >> >> Therefore, our question is: >> >> Is there an overview of which codecs libtiff currently supports? >> >> And is anyone already working on integrating qio or FFV1? >> >> If not, would such extensions have a chance of being incorporated >> into libtiff? >> >> With best regards >> >> Andreas >> >> [1] our testset (scans historic monographs) results in ff. lossless >> compression ratios: >> >> tiff/lzw – 94% >> >> tiff/zstd – 67% >> >> qoi – 50% >> >> png – 53% >> >> ffv1 – 36% >> >> jpeg-xl – 33% >> >> -- >> >> team member “long-term preservation“ >> >> Saxon State- and University Library Dresden (SLUB) >> >> Department 2 (IT), Division 2.3 (infrastructure and digital long-term >> preservation) >> >> Zellescher Weg 18 | 01069 Dresden >> >> phone: +49 351 4677 763 >> >> E-Mail: [email protected] >> <mailto:[email protected]> >> >> http://www.slub-dresden.de/<http://www.slub-dresden.de/> >> <http://www.slub-dresden.de/<http://www.slub-dresden.de/>> | @slubdresden >> >> >> _______________________________________________ >> Tiff mailing list >> [email protected] >> https://lists.osgeo.org/mailman/listinfo/tiff<https://lists.osgeo.org/mailman/listinfo/tiff> > _______________________________________________ > Tiff mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/tiff<https://lists.osgeo.org/mailman/listinfo/tiff> -- http://www.spatialys.com/<http://www.spatialys.com/> My software is free, but my time generally not. _______________________________________________ Tiff mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/tiff<https://lists.osgeo.org/mailman/listinfo/tiff>
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