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Proceedings Paper

Rapid traversal of an image database using binary synthetic discriminant filters
Author(s): Max B. Reid; Maria G. Bualat; Paul W. Ma; John D. Downie
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Paper Abstract

Pattern recognition invariant to image rotations of up to 75 deg, using a single filter, has been demonstrated for binary synthetic discriminant function (BSDF) optical filters, suggesting their use in directed graph-arranged data bases which can be rapidly traversed by means of a filter-plane programmable spatial light modulator (SLM). The filter data base is arranged as a tree structure in which the root node filters are invariant to over 60 deg rotation, while the leaves are 5-deg invariant. Results are presented from experiments with BSDFs designed to recognize in-plane-rotated views of a Space Shuttle Orbiter. Using a magnetooptic SLM that is driven at 350 Hz in the filter plane, orientation identifications requiring less than 30 msec have been achieved after sequencing through only 10 BSDFs.

Paper Details

Date Published: 1 September 1990
PDF: 6 pages
Proc. SPIE 1296, Advances in Optical Information Processing IV, (1 September 1990); doi: 10.1117/12.21260
Show Author Affiliations
Max B. Reid, NASA/Ames Research Ctr. (United States)
Maria G. Bualat, NASA/Ames Research Ctr. (United States)
Paul W. Ma, NASA/Ames Research Ctr. (United States)
John D. Downie, NASA/Ames Research Ctr. (United States)

Published in SPIE Proceedings Vol. 1296:
Advances in Optical Information Processing IV
Dennis R. Pape, Editor(s)

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