RECONSTRUCTION EXECUTION METHOD, RECONSTRUCTION EXECUTION DEVICE, RECORD MEDIUM, INVERSE CONVERSION EXECUTION METHOD, INVERSE CONVERSION EXECUTION DEVICE, SUITABLE RECONSTRUCTION GENERATING METHOD, SUITABLE RECONSTRUCTION GENERATOR, CODING DATA PROCESSING METHOD, CODING DATA PROCESSING UNIT AND DATA PROCESSING SYSTEM

摘要

PROBLEM TO BE SOLVED: To realize a compression/expansion system by which an image such as a natural image, a binary image and a graphic image is processed satisfactorily. SOLUTION: A system selection device 210 selects a compression system, based on a property of an image or an area. Data of the image (area) such as an natural image having a smooth edge and a smooth area are processed by blocks 202, 203, 205 of reversible wavelet transform, embed sequence quantization and context model, and the result is coded by an entropy coder 206. A binary image or a graphic image or the like is subjected to gray coding and context modeling in a block 204, and the result is coded by the entropy coder 206.