Patent ID: 7221483
Filing Date: 2007-05-22
Classification: G06T,H04N

Abstract:
1. An image encoding method for encoding image data using a block consisting of plural pixels as a unit of processing, said image encoding method comprising the steps of: extracting statistical information for each pixel value, from a plurality of encoded blocks adjacent to an encoding target block, at each corresponding position in said respective blocks; and performing encoding processing on said encoding target block using the extracted statistical information, wherein the encoding step comprises the steps of: wherein the selecting step comprises the step of: selecting a pixel as a reference pixel from said encoding target block and a plurality of adjacent blocks whose encoding order is earlier than said target block, said pixel placed at a position within a block having a value of statistical information such that a difference between this value and a value of statistical information for the position of an encoding target pixel within said encoding target block is within a specified range, and said pixel whose encoding order is earlier than said encoding target pixel.