At Stanford we started an effort to develop techniques for image data base browsing and retrieval based on picture content. Queries are pictorial descriptions of the desired images, and are formulated from a point-and-click graphical query editor that lets the user navigate in the space of description parameters. The retriever extracts a set of indices from the query and searches the data base with efficient, approximate nearest neighbor algorithms from computational geometry. The same navigator used by the query editor enables the user to view the possibly large set of retrieved images, or browse the whole data base.
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