An exemplary image data compression apparatus includes a compression circuit, a characteristic value extracting circuit, and a selecting circuit. The compression circuit is utilized for applying a plurality of different compression approaches to a first block, and accordingly generating a plurality of...http://www.google.com/patents/US8160137?utm_source=gb-gplus-sharePatent US8160137 - Image data compression apparatus for referring to at least one characteristic value threshold to select target compression result from candidate compression results of one block and related method thereof
