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Proceedings Paper

Rotation- and scale-invariant joint transform correlator using FLC-SLMs
Author(s): Yasuyuki Mitsuoka; Tadao Iwaki; Shuhei Yamamoto
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Paper Abstract

A rotation and scale invariant joint transform correlator is described. The polar-logarithmic coordinate transformation is used as a preprocessing of input images. The resultant coordinate transformed images are interfaced to a joint transform correlator. The use of optically addressed ferroelectric liquid crystal spatial light modulators at the coordinate transform plane and at the Fourier plane allows data to be processed faster than video rate and gives the characteristics of a binary joint transform correlator. The rotation and scale invariance of the correlator is demonstrated experimentally.

Paper Details

Date Published: 1 November 1991
PDF: 9 pages
Proc. SPIE 1564, Optical Information Processing Systems and Architectures III, (1 November 1991); doi: 10.1117/12.49715
Show Author Affiliations
Yasuyuki Mitsuoka, Seiko Instruments Inc. (Japan)
Tadao Iwaki, Seiko Instruments Inc. (Japan)
Shuhei Yamamoto, Seiko Instruments Inc. (Japan)

Published in SPIE Proceedings Vol. 1564:
Optical Information Processing Systems and Architectures III
Bahram Javidi, Editor(s)

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