Optical architecture of a joint transform local correlator

Arne Skov Jensen; Alexander G. Sobolev; Vladimir A. Volkov; Gennady M. Reitblat

doi:10.1117/12.262615

27 December 1996 Optical architecture of a joint transform local correlator

Arne Skov Jensen, Alexander G. Sobolev, Vladimir A. Volkov, Gennady M. Reitblat

Proceedings Volume 2969, Second International Conference on Optical Information Processing; (1996) https://doi.org/10.1117/12.262615
Event: Second International Conference on Optical Information Processing, 1996, St. Petersburg, Russian Federation

Abstract

Local correlations are correlations of separate or overlapping small areas from relevant image sources: images pairs from spatial and/or temporal optical flows. The information gained from the local correlation functions is the maximum peak position that can be related to certain flow parameters, viz. velocity and depth. From an optical processing point of view, these data structures have the advantage of being their own reference, which is a considerable simplification compared with the data processing scheme of a conventional Van der Lugt correlator. An optical implementation of a joint transform local correlator can be performed with few and very compact optical elements. Three architectures will be discussed: a set-up with a refractive lens array, a set-up with a diffractive lens array and a set-up based on an acousto- optical time integrating correlator.

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Arne Skov Jensen, Alexander G. Sobolev, Vladimir A. Volkov, and Gennady M. Reitblat "Optical architecture of a joint transform local correlator", Proc. SPIE 2969, Second International Conference on Optical Information Processing, (27 December 1996); https://doi.org/10.1117/12.262615

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KEYWORDS

Optical correlators

Joint transforms

Spatial light modulators

Image segmentation

Correlation function

Image processing

Sensors

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