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Proceedings Paper

Parameter Extraction By Holographic Filtering
Author(s): J. L. Horner; H. J. Caulfield
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Paper Abstract

Holographic pattern recognition has been plague by too much sensitivity to such parameters as rotation and scale. We show here how to use that sensitivity to make rapid, accurate estimations of those parameters. For the particular case studied, we made signal-magnitude independent measurements of three rotation angles from -15° to +15° using three matched filters at -15°, 0°, and 15° multiplexed onto a single hologram. This lead to obtain a worst-case accuracy (standard deviation) of 1.0° for intermediate angles. The composite filter allows a search to be made electronically in the output plane, thus avoiding any moving parts, i.e., object or matched filter.

Paper Details

Date Published: 7 December 1981
PDF: 5 pages
Proc. SPIE 0292, Processing of Images and Data from Optical Sensors, (7 December 1981); doi: 10.1117/12.932805
Show Author Affiliations
J. L. Horner, Rome Air Development Center (United States)
H. J. Caulfield, Aerodyne Research, Inc. (United States)

Published in SPIE Proceedings Vol. 0292:
Processing of Images and Data from Optical Sensors
William H. Carter, Editor(s)

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