NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Rapid traversal of an image database using binary synthetic discriminant filtersPattern 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.
Document ID
19910048085
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Reid, Max B.
(NASA Ames Research Center Moffett Field, CA, United States)
Bualat, Maria G.
(NASA Ames Research Center Moffett Field, CA, United States)
Ma, Paul W.
(NASA Ames Research Center Moffett Field, CA, United States)
Downie, John D.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Optics
Meeting Information
Meeting: Advances in Optical Information Processing IV
Location: Orlando, FL
Country: United States
Start Date: April 18, 1990
End Date: April 20, 1990
Sponsors: SPIE
Accession Number
91A32708
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available