Complex linear morphology for intensity and distortion-invariant pattern recognition

Laurence G. Hassebrook; Mohammad Rahmati; Raymond C. Daley; Michael E. Lhamon

doi:10.1117/12.169439

1 March 1994 Complex linear morphology for intensity- and distortion-invariant pattern recognition

Laurence G. Hassebrook, Mohammad Rahmati, Raymond C. Daley, Michael E. Lhamon

Proceedings Volume 2237, Optical Pattern Recognition V; (1994) https://doi.org/10.1117/12.169439
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

Any desired diffraction pattern can be produced in the Fourier plane by specification of a corresponding input plane transparency. Complex-valued transmittance is generally required, but in practice, phase-only transmittance is used. Many design procedures use numerically intensive, constrained optimization. We, instead, use a noniterative procedure that directly translates the desired, but unavailable, complex transparency into an appropriate phase transparency. At each pixel the value of phase is pseudorandomly selected from a random distribution whose standard deviation is specified by the desired amplitude. We apply the pseudorandom phase-only encoding to hybrid composite filter design. These filters are used in a filter bank architecture to perform intensity- and distortion-invariant pattern recognition.

Citation Download Citation

Laurence G. Hassebrook, Mohammad Rahmati, Raymond C. Daley, and Michael E. Lhamon "Complex linear morphology for intensity- and distortion-invariant pattern recognition", Proc. SPIE 2237, Optical Pattern Recognition V, (1 March 1994); https://doi.org/10.1117/12.169439

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