Patent ID: 7602982
Filing Date: 2009-10-13
Classification: G06T,H04N

Abstract:
1. A method, comprising using a system to perform the steps of: generating a hierarchy based at least on a transformation of a digital image comprising a low-low (LL) subband and a corresponding plurality of threshtrees, the threshtrees include a tree structure including a plurality of levels, each level including a plurality of vectors each associated with a plurality of descendent vectors of a subsequent level up to a final level; losslessly encoding the low-low (LL) subband of said hierarchy; vector quantization encoding the plurality of threshtrees based at least in part on a zerotree insignificance prediction, wherein vector quantization encoding comprises selecting a significance map of each threshtree having a minimized cost function according to a rate-distortion optimization by, for each current vector of the plurality of vectors, generating an encoded image based on a combination of both the encoded LL subband and the encoded plurality of threshtrees.