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Optical Engineering

Joint transform correlator performance enhancement by a logarithmic-polar transformation
Author(s): Osvaldo Perez; Mohammad A. Karim
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Paper Abstract

Rotation and scale requirements imposed by the joint Fourier transform correlator (JFTC) are relaxed by means of a logarithmic-polar transformation of the input object. The resulting target recognition/tracking system utilizes the positional invariance of the Fourier image, whereas the logarithmic-polar mapping is performed on the Fourier plane instead of the intensity of the Fourier plane. The positional information is saved, and consequently, multiple input objects are processed simultaneously. Enhancements in the areas of input binarization and power spectrum enhancements to the liquid crystal television based JFTC are performed to improve its recognition and discrimination abilities.

Paper Details

Date Published: 1 November 1993
PDF: 9 pages
Opt. Eng. 32(11) doi: 10.1117/12.148112
Published in: Optical Engineering Volume 32, Issue 11
Show Author Affiliations
Osvaldo Perez, Abbott Laboratories (United States)
Mohammad A. Karim, Univ. of Dayton (United States)

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