IMAGE SEARCH DEVICE, METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To more accurately search an image indicating an instance.SOLUTION: A feature summarization and tabulation part 12 creates a summarized feature DB 21 in which local features extracted from an instance image are summarized and an instance feature DB 22 in which the appearance frequency of each summarized feature in each instance image group is shown, and extracts the local features from each frame image. A feature collation and tabulation part 15 creates a frame image feature DB 23 of each video and a video feature DB 24 on the basis of the collation result of each local feature extracted from each frame image with each summarized feature in the summarized feature DB 21. An inverse frame image frequency calculation part 16 creates an inverse frame image frequency DB 25 indicating the IFF(Inverse Frame Frequency) of each summarized feature, and a search ranking part 17 refers to the instance feature DB 22, the inverse frame image frequency DB25 and the video feature DB 24, and calculates EBM(Extension Best Match) 25 under the consideration of the instance feature DB 22 and the IFF from BM(Best Match), and creates a search result based on the EBM 25.