APPARATUS FOR COMPRESSING AND DECOMPRESSING IMAGE DATA

The present invention relates to an apparatus for compressing and decompressing the digital image data designed for minimizing degradation of the image quality and for improving the compression efficiency. Discriminative over the conventional package quantization method based on the statistical characteristics of an image, the invention is configured such that the image is firstly segmented into predetermined number of sub-blocks by the block segmentator, and each divided blocks are adopted by the different compression technique in accordance with the shape or complicity of the image.