Patent ID: 6404923
Filing Date: 2002-06-11
Classification: G06T

Abstract:
An image classification and compression system comprising:conversion means for converting an image into a series of vectors defined in a multidimensional space, said image having elements classifiable among a set of classes; lookup table means for mapping said vectors many-to-one to indices, each of said indices identifying a respective one of said classes, said lookup table means being coupled to said conversion means for receiving said vectors and including: at least a first stage lookup table designed using a codebook design procedure incorporating block transforms; and a final stage lookup table designed using a tree structured codebook design procedure such that the vectors are mapped to the set of codes by successive utilization of the first stage lookup table and the final stage lookup table, wherein the final stage lookup table provides a pair of indices, one identifying image type, and the other for a codebook vector of a codebook having a weighted combination of classification optimized measures and compression optimized measures.