Patent ID: 7068848

Claim:
A method for coding a wavelet-transformed image using a SPIHT (Set Partional in Hierarchical Tree) algorithm, comprising the steps of: (a) compressing wavelet transform coefficients using the SPIHT algorithm; (b) coding coefficients and a set of coefficients related to a region of interest up to a bit plane defined by a user; (c) performing compensation-coding with respect to coefficients and a set of coefficients excluded from the step (b); and (d) compressing coefficients of remaining bit plane using the SPIHT algorithm, wherein in the step (b), new list (NLSP) is formed using coefficients except for region of interest coefficients among coefficients included in a list (LSP) of significant coefficients faormed based on the SPIHT algorithm, and coefficients which are not related with the region of interest included in the list (NLSP) are excluded from the region of interest coding operation.