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Liquid-Crystal Light Valve Enhances Edges In ImagesExperiments show liquid-crystal light valve (LCLV) exhibits operating mode in which it enhances edges in images projected on it. Operates in edge-enhancing mode (or in combination of edge-enhancing and normal modes) by suitably adjusting bias voltage and frequency. Enhancement of edges one of most important preprocessing steps in optical pattern-recognition systems. Incorporated into image-processing system to enhance edges without introducing excessive optical noise.
Document ID
19910000144
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Chao, Tien-Hsin (Caltech)
Liu, Hua-Kuang (Caltech)
Date Acquired
August 14, 2013
Publication Date
April 1, 1991
Publication Information
Publication: NASA Tech Briefs
Volume: 15
Issue: 4
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
NPO-17768
Accession Number
91B10144
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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