| 摘要 |
This invention realizes, with low cost, an image search apparatus which can quickly obtain adequate search results upon searching for document images which are identical or similar to a predetermined document image. To this end, an image search apparatus of this invention has the following arrangement. That is, an image search apparatus for searching for images similar to a query image, includes a region division unit ( 204, 209 ) which extracts a plurality of partial regions which form an image, a region feature extraction unit ( 205, 210 ) which calculates the number of partial regions and center of gravity positions, and a feature amount updating unit ( 206 ) which saves the calculated number of partial regions and center of gravity positions in an image region management DB ( 216 ) as an index. The image search apparatus loads partial regions which match the number of partial regions and center of gravity positions of a query image from the image region management DB ( 216 ) onto a memory, narrows down registered images on the basis of the loaded partial regions, and searches the narrowed-down registered images for images.
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