Adaptive learning with joint transform correlators

Iterative learning procedures can be employed to generate synthetic reference patterns for joint transform correlators. These patterns can be implemented directly on inexpensive spatial light modulators (SLMs) based on liquid crystal television sets. The algorithm takes into account random electronic noise in the system and compensates for SLM distortions. Experimental results demonstrate the advantages of the new approach with two algorithmic examples.

[1]  J Shamir,et al.  Entropy optimized filter for pattern recognition. , 1990, Applied optics.

[2]  Emile H. L. Aarts,et al.  Simulated Annealing: Theory and Applications , 1987, Mathematics and Its Applications.

[3]  J. Goodman,et al.  A technique for optically convolving two functions. , 1966, Applied optics.

[4]  J. Horner,et al.  Single spatial light modulator joint transform correlator. , 1989, Applied optics.

[5]  H J Caulfield,et al.  Improved discrimination in optical character recognition. , 1969, Applied optics.

[6]  R R Kallman,et al.  Optimal low noise phase-only and binary phase-only optical correlation filters for threshold detectors. , 1986, Applied optics.

[7]  A. B. Vander Lugt,et al.  Signal detection by complex spatial filtering , 1964, IEEE Trans. Inf. Theory.

[8]  D A Gregory,et al.  Effects of fringe binarization of multiobject joint transform correlation. , 1989, Applied optics.

[9]  J Shamir,et al.  Phase-only entropy-optimized filter generated by simulated annealing. , 1989, Optics letters.

[10]  B Javidi,et al.  Synthetic discriminant function-based binary nonlinear optical correlator. , 1989, Applied optics.

[11]  Francis T. S. Yu,et al.  A real-time programmable joint transform correlator , 1984 .

[12]  David Casasent,et al.  Bipolar incoherent optical pattern recognition by carrier encoding. , 1979, Applied optics.

[13]  B. V. K. Vijaya Kumar,et al.  Review Of Synthetic Discriminant Function Algorithms , 1989, Other Conferences.

[14]  R. Kikuchi,et al.  Maximum entropy image restoration. I. The entropy expression , 1977 .

[15]  Demetri Psaltis,et al.  Optical-Image Correlation With A Binary Spatial Light-Modulator , 1984 .

[16]  J. Allebach,et al.  Synthesis of digital holograms by direct binary search. , 1987, Applied optics.