Fast Random Access to Wavelet Compressed Volumetric Data Using Hashing

Flemming Friche Rodler, Rasmus Pagh

Abstract


We present a new approach to lossy storage of the coefficients of wavelet transformed data. While it is common to store the coefficients of largest magnitude (and let all other coefficients be zero), we allow a slightly different set of coefficients to be stored. This brings into play a recently proposed hashing technique that allows space efficient storage and very efficient retrieval of coefficients. Our approach is applied to compression of volumetric data sets. For the ``Visible Man'' volume we obtain up to 80% improvement in compression ratio over previously suggested schemes. Further, the time for accessing a random voxel is quite competitive.

Full Text:

PDF


DOI: http://dx.doi.org/10.7146/brics.v8i34.21694
This website uses cookies to allow us to see how the site is used. The cookies cannot identify you or any content at your own computer.
OK


ISSN: 0909-0878 

Hosted by the Royal Danish Library and Aarhus University Library