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Optical Engineering

Design and evaluation of three-level composite filters obtained by optimizing a compromise average performance measure
Author(s): Charles D. Hendrix; Bhagavatula Vijaya Kumar
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Paper Abstract

Correlation filters with three transmittance levels ( +1 , 0, and -1) are of interest in optical pattern recognition because they can be implemented on available spatial light modulators and because the zero level allows us to include a region of support (ROS). The ROS can provide additional control over the filter's noise tolerance and peak sharpness. A new algorithm based on optimizing a compromise average performance measure (CAPM) is proposed for designing three-level composite filters. The performance of this algorithm is compared to other three-level composite filter designs using a common image database and using figures of merit such as the Fisher ratio, error rate, and light efficiency. It is shown that the CAPM algorithm yields better results.

Paper Details

Date Published: 1 June 1994
PDF: 7 pages
Opt. Eng. 33(6) doi: 10.1117/12.170734
Published in: Optical Engineering Volume 33, Issue 6
Show Author Affiliations
Charles D. Hendrix, Carnegie Mellon Univ. (United States)
Bhagavatula Vijaya Kumar, Carnegie Mellon Univ. (United States)

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