Distortion- and intensity-invariant optical correlation filter system

Mohammad Rahmati; Laurence G. Hassebrook; M. Bhushan

doi:10.1117/12.50839

1 December 1991 Distortion- and intensity-invariant optical correlation filter system

Mohammad Rahmati; Laurence G. Hassebrook; M. Bhushan;

Author Affiliations +

Proceedings Volume 1567, Applications of Digital Image Processing XIV; (1991) https://doi.org/10.1117/12.50839
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

A new approach to intensity-invariant filter design is introduced. This approach post-processes a distortion-invariant correlation response. The correlation responses of a filter bank are mapped into a 3-D volume matrix where the third dimension is intensity. For each given intensity level the volume matrices are weighted by a complex exponential with unit magnitude and linear in phase. These weighted volume matrices are summed together to form filter volume matrix. Pages or slices from the volume are used as a bank of 2-D correlation filters. Computer simulations are included to quantify the performance of this approach.

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Mohammad Rahmati, Laurence G. Hassebrook, M. Bhushan, "Distortion- and intensity-invariant optical correlation filter system", Proc. SPIE 1567, Applications of Digital Image Processing XIV, (1 December 1991); doi: 10.1117/12.50839; https://doi.org/10.1117/12.50839

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