Patent ID: 6757441
Filing Date: 2004-06-29
Classification: G06T

Abstract:
A method of encoding an image data group including a plurality of image data, comprising:the reference image selection step of selecting a predetermined number of references image(s) from the plurality of image data; the step of segmenting each of the image data other than the reference image(s) into blocks each having a predetermined size; the step of detecting an area, which is included in the reference image(s), has the same size as the predetermined size, and has a (predetermined number)-th highest data correlation with a block, and detecting a relative positional relationship with the detected area; the step of computing difference data between pixel data of the block and pixel data of the area, the positional relationship of which has been detected; the orthogonal transform step of computing an orthogonal transform of each of image data other than the reference images in units of blocks each having the predetermined size; the step of selecting a preset number of data as data to be encoded from the data obtained after the orthogonal transforms are computed; and the encoding step of fixed-length encoding and outputting the data to be encoded as encoded image data, wherein the orthogonal transform step includes the step of computing an orthogonal transform of the difference data.