Lossless image compression

[Cyrille Berger Skott]

On Monday 06 Feb 2012, Boudewijn Rempt wrote:
> 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

Actually there is http://rawsamples.ch/index_en.php

And for Krita we would also need 32bits float. But I guess we can use different 
method in function of bit depth anyway.

-- 
Cyrille Berger Skott