Accession Number : ADA327547

Title :   ONR Young Investigator Award Number N00014-95-1-0728 (University of Washington ).

Descriptive Note : Quarterly rept.

Corporate Author : WASHINGTON UNIV SEATTLE DEPT OF COMPUTER SCIENCE AND ENGINEERING

PDF Url : ADA327547

Report Date : 31 JUL 1995

Pagination or Media Count : 4

Abstract : Fast multiresolution image querying, with Charles Jacobs (a WV undergraduate) and Adam Finkelstein (a WV Ph.D. student). In this project, we have developed a method for searching in an image database using a query image that is similar to the intended target. The query image may be a hand-drawn sketch or a (potentially low-quality) scan of the image to be retrieved. Our searching algorithm makes use of multiresolution wavelet decompositions of the query and database images. The coefficients of these decompositions are distilled into small 'signatures' for each image. We introduce an 'image querying metric' that operates on these signatures. This metric essentially compares how many significant wavelet coefficients the query has in common with potential targets. The metric includes parameters that can be tuned, using a statistical analysis, to accommodate the kinds of image distortions found in different types of image queries. The resulting algorithm is simple, requires very little storage overhead for the database of signatures, and is fast enough to be performed on a database of 20,000 images at interactive rates (on standard desktop machines) as a query is sketched.

Descriptors :   *IMAGES, *SEARCHING, *INTERROGATION, SCANNING, DATA BASES, ALGORITHMS, INTERACTIONS, RATES, TARGETS, COEFFICIENTS, SIGNATURES, STATISTICAL ANALYSIS, DISTORTION, DECOMPOSITION.

Subject Categories : Computer Systems
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE