[ELGIS] POLL: 12 bit JPEG compression in TIFF

[Peter Hopfgartner]

On 07/29/2011 07:00 PM, Hatzopoulos, Nikolaos wrote:
> because I was trying to compress an 10bit image, this option might helped
> but I don't know how much it works because when I tried to do it, it didn't work.
> So how much reliable is this option, and also is it compatible?
>
> --Nikos
> ________________________________________
> From: el-bounces at lists.osgeo.org [el-bounces at lists.osgeo.org] on behalf of Peter Hopfgartner [peter.hopfgartner at r3-gis.com]
> Sent: Friday, July 29, 2011 2:11 AM
> To: el at lists.osgeo.org
> Subject: [ELGIS] POLL: 12 bit JPEG compression in TIFF
>
> How many out there would need TIFFs with 12 bit JPEG compression?
> This would require that we configure with:
>
> --with-libtiff=internal --with-geotiff=internal --with-jpeg=internal
> --with-jpeg12
>
> see http://trac.osgeo.org/gdal/wiki/TIFF12BitJPEG
>
> Peter
> _______________________________________________
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> el at lists.osgeo.org
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  Hi Nikos,

you will have trouble opening 12 bit JPEGS with most image editing 
service, see http://en.wikipedia.org/wiki/JPEG. Anyway, on EL, once that 
GDAL has this option included, all GDAL-based software should be able to 
read/write this format (QGIS, MapServer, ....).
I do not know anything about 10 bit color depth, olny 8 bot and 12 bit.

Peter