Device and method for image encoding

摘要: PURPOSE: To improve the efficiency of encoding in block units such as reversible gradient image data, etc., by calculating a parameter to regulate similar surface for data and difference from surface. CONSTITUTION: Block generation circuit 102 is sent plane calculator 201 buffer 203. The calculates define prescribed method, sends it generator 202 encoder 205. generates according received parameter, outputs subtracter 204. 204 between input 203 every picture element, Huffman 206. 206 assigns code built-in table, 104 via multiplexer 207.