[Insight-users] Dearth of 3D compression -3D SPIHT

[Kevin H. Hobbs]

On Fri, 2007-05-04 at 13:01 +0700, Invisible Human wrote:
> Hi Luis,
> 
> Yes i am looking for lossless compression only.  The best i have encountered so far is the jpeg part 2 compression provided by the kakadu library but even that compresses the 500MB 3D image to 50% of its original size which seems a little strange considering that the images have at least 30% 0-valued pixels.  My guess is that all algorithms are primarily for 2D slices but tweaked for 3D images.  No algorithm really exploits both spatial and temporal redundancies.
> 
> I have read good things about an algorithm called 3D SPIHT but havent been able to find any decent implementation for it.
> 
> Do you have any other pointers?
> 
> Regards,
> 
> IH

Just a comment from a novice: Wouldn't movie compression work for a
third dimension? It just occurred to me that the work has been done
there.
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