INFORMATION ENCODING APPARATUS AND METHOD, INFORMATION RETRIEVAL APPARATUS AND METHOD, INFORMATION RETRIEVAL SYSTEM AND METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To reduce an operation amount for retrieval and to enable rapid retrieval.

SOLUTION: An image dividing portion 61 divides a macro block that is divided original information into subblocks of a predetermined size, an average operation portion 62 obtains an average of the subblocks, an average separation block operation portion 63 obtains an average separation block by subtracting an average from the macro block, and a block encoding portion 64 encodes the average separation block, in each hierarchy, obtained by repetitive division so that the size of the subblock may be smaller within the micro block.

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