MULTI-RESOLUTION IMAGE DATA MANAGEMENT SYSTEM AND METHOD BASED ON TILED WAVELET-LIKE TRANSFORM AND SPARSE DATA CODING

摘要

PROBLEM TO BE SOLVED: To provide an image compression and encoding system with a quantization procedure that uses smaller quantization divisors to quantize the wavelet coefficients of heavily featured regions than the quantization divisor used to quantize the wavelet coefficients of regions only having fewer features.

SOLUTION: An image processing system processes tiles in a predefined order (168). A wavelet transform uses short filters applied to image boundaries to generate edge coefficients. Long filters are used to image data at interior locations to generate non-edge coefficients (172). Both filters are applied only to image data within the tile and only to transform coefficients within the earlier sets of transformed data. A corresponding decoder is provided at the client (180).

COPYRIGHT: (C)2007,JPO&INPIT