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Liquid-Crystal-Television Image SubtractersTwo image-subtraction systems from output images that show differences between input images of two objects. First: differences appear as bright regions in otherwise dark output image. Second: differences and similarities shown by colors. All parts of two images processed simultaneously by optical components only; digital electronic processing of data not required. Concept offers potential for rapid, inexpensive comparison of images in such applications as automatic inspection, medical diagnosis, and robotic vision.
Document ID
19880000523
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Chao, Tien-Hsin
(Caltech)
Liu, Hua-Kuang
(Caltech)
Date Acquired
August 13, 2013
Publication Date
November 1, 1988
Publication Information
Publication: NASA Tech Briefs
Volume: 12
Issue: 10
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
NPO-17144
Accession Number
88B10523
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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