Re: [gdal-dev] COG - RGBI
Thanks all for the feedback! Right now we are looking at doing this for only 8bit. Regards On Fri, 8 May 2020 at 15:14, Frank Warmerdam wrote: > Travis, > > The big benefit of JPEG compression comes with YCbCr color space which I > do not believe can be mixed with a 4 band RGBI product. So I'm not sure > how one would do this. One could certainly put the NIR in a distinct > directory in the GeoTIFF, but not many applications would know how to > utilize that, and it would not appear as just a 4th band from the GDAL view > of things. > > In theory you could do BAND interleaved JPEG and compress each of the 4 > bands separately but I do not think you get a great quality/compression > result from this. > > I'm also curious if you were wanting to just do 8bit or 12/16bit? > > I would love to have a way of distributing 12/16 bit RGBI data with a good > (gentle) lossy compression and good application compatibility in TIFF. > > Best regards, > Frank > > On Fri, May 8, 2020 at 3:08 PM Travis Kirstine > wrote: > >> Is it possible to create RGBI Cloud Optimized Tiffs with JPEG compression? >> ___ >> gdal-dev mailing list >> gdal-dev@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/gdal-dev > > > > -- > > ---+-- > I set the clouds in motion - turn up | Frank Warmerdam, > warmer...@pobox.com > light and sound - activate the windows | +1 650-701-7823 > and watch the world go round - Rush| Geospatial Software Developer > ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] COG - RGBI
On vendredi 8 mai 2020 15:08:36 CEST Travis Kirstine wrote: > Is it possible to create RGBI Cloud Optimized Tiffs with JPEG compression? Possibly. But not with the COG driver, which doesn't offer the option for that. You should use the old way with the GTiff driver by forcing -co INTERLEAVE=BAND so that each band is JPEG compressed separately (since pixel-interleaved JPEG compression is limited to 3 samples) -- Spatialys - Geospatial professional services http://www.spatialys.com ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] COG - RGBI
Travis, The big benefit of JPEG compression comes with YCbCr color space which I do not believe can be mixed with a 4 band RGBI product. So I'm not sure how one would do this. One could certainly put the NIR in a distinct directory in the GeoTIFF, but not many applications would know how to utilize that, and it would not appear as just a 4th band from the GDAL view of things. In theory you could do BAND interleaved JPEG and compress each of the 4 bands separately but I do not think you get a great quality/compression result from this. I'm also curious if you were wanting to just do 8bit or 12/16bit? I would love to have a way of distributing 12/16 bit RGBI data with a good (gentle) lossy compression and good application compatibility in TIFF. Best regards, Frank On Fri, May 8, 2020 at 3:08 PM Travis Kirstine wrote: > Is it possible to create RGBI Cloud Optimized Tiffs with JPEG compression? > ___ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev -- ---+-- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | +1 650-701-7823 and watch the world go round - Rush| Geospatial Software Developer ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] COG - RGBI
I guess you mean RGB and I for Infra-red ? Anyway the answer will be NO. JPEG only allow 3 bands + a bit mask (same for Webp). For raster with more than 3 bands there is no real option to get compression (with loss) as high as with JPEG or WEBP . > Le 8 mai 2020 à 15:08, Travis Kirstine a écrit : > > Is it possible to create RGBI Cloud Optimized Tiffs with JPEG compression? > ___ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] COG - RGBI
Is it possible to create RGBI Cloud Optimized Tiffs with JPEG compression? ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
