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Proceedings Paper

Technique for large-dynamic-range wavelet image processing using coherent optics and binary SLMs
Author(s): Harris Turk; C. James Munno
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Paper Abstract

High speed spatial light modulators are typically binary in operation, which complicates their use as spatial filter masks when large dynamic range filters are needed. Wavelet image transformations may be implemented by a series of spatial filtering operations, but these filters typically must satisfy minimum uncertainty-principle or other constraints. For these constraints to hold, the amplitudes of the filter masks must closely follow the amplitudes of the appropriate wavelet kernel masks and therefore simple use of binary spatial light modulator (SLM) filter masks is impossible. A bit-slice method is therefore presented which can circumvent the dynamic range limitations of typical SLMs when used in coherent optical processors. The method takes advantage of the parallelism and linearity of optical processing and only results in a (log2N)2 increase in complexity for images with N gray levels. Computer modeled results are presented.

Paper Details

Date Published: 3 September 1993
PDF: 10 pages
Proc. SPIE 1955, Signal Processing, Sensor Fusion, and Target Recognition II, (3 September 1993); doi: 10.1117/12.154990
Show Author Affiliations
Harris Turk, Vitro Corp. (United States)
C. James Munno, Vitro Corp. (United States)

Published in SPIE Proceedings Vol. 1955:
Signal Processing, Sensor Fusion, and Target Recognition II
Ivan Kadar; Vibeke Libby, Editor(s)

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