[Kde-imaging] Lossless image compression

Gilles Caulier caulier.gilles at gmail.com
Tue Feb 7 12:29:38 UTC 2012

2012/2/6 Boudewijn Rempt <boud at valdyas.org>:
> On Mon, 6 Feb 2012, Christoph Feck wrote:
>> Hi,
>> you might have already read [1] of my current project "IZ" [2], aiming
>> for fast lossless image compression for photos.
>> Performance wise, IZ lies in the "sweet spot" where it actually
>> improves loading time (because of less disk transfers), instead of
>> slowing it down (because of the slow compression). It is intended to
>> replace code where uncompressed data or only simple run-length
>> encoding was used because of speed constraints.
>> The library currently only handles 8 bit RGB, mostly because of the
>> lack of a sufficiently large set of sample images which use 16 bit
>> and/or alpha channel. Pointers appreciated.
> Many cameras support 16 bit raw pictures; maybe Gilles has a database
> of useful images?B


Some PNG, and TIFF are 16 bits here. All RAW files are 12/14 bits...

Gilles Caulier

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