US Patent 7827179 Data clustering system, data clustering method, and data clustering program

An object of the present invention is to perform data clustering while preventing the processing speed from decreasing while maintaining accuracy. A block division section 3 divides a block received from a DB access section 2 into sufficiently small blocks. A block storage section 8 stores blocks supplied from the block division section 3 and hierarchical relationship between the blocks. A block integration section 5 integrates blocks and groups in the order from a hierarchically deeper position to a shallower position based on the stored hierarchical relationship.