Spatial frequency multiplexed coherent optical processor for cal

Details Spatial frequency multiplexed coherent optical processor for cal Spatial frequency multiplexed coherent optical processor for cal

1982-06-10

1985-03-19

Arnold, Bruce Y.

Boots, shoes, and leggings

364822, 35016215, G06G 900

Patent

active

045055440

ABSTRACT:
An optical processor that can compute the moments of a two-dimensional image in parallel. The image is placed at the plane of a holographic mask which is disposed in the front focal plane of a Fourier-transforming lens and each of the desired moments is found at a respective one of a plurality of photodetectors arrayed in the back focal plane of the lens.

REFERENCES:
patent: 3776616 (1983-12-01), Donklias
patent: 4037965 (1977-07-01), Weiss
Casasent et al., "Hybrid Processor to Compute Invariant Moments for Pattern ecognition", Optics Letters, vol. 5, No. 9, Sep. 1980, pp. 395 to 397.
L. J. Cutrona et al., "Optical Data Processing and Filtering Systems", IRE Transactions on Information Theory (Jun. 1960), pp. 386-400.

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