Coding intensity images as phase-only images for use in an optic

Details Coding intensity images as phase-only images for use in an optic Coding intensity images as phase-only images for use in an optic

1991-06-19

1993-05-25

Arnold, Bruce Y.

Optical: systems and elements

Diffraction

Using fourier transform spatial filtering

364822, G02B 2740, G06E 300

Patent

active

052145344

ABSTRACT:
A method of performing image correlation in a Fourier transform correlator utilizes phase-encoding of the input image as a phase object with a normalized amplitude component. Phase-only reference image filters are used in conjunction with the phase-encoded input objects to improve the signal to clutter ratio. This technique can employ optical or digital implementation.

REFERENCES:
patent: 4588260 (1986-05-01), Horner
patent: 4765714 (1988-08-01), Horner et al.
patent: 4826285 (1989-05-01), Horner
patent: 5024508 (1991-06-01), Horner
Horner, J. L. and Leger, J. R. "Pattern Recognition with Binary Phase-Only Filters" Applied Optics, vol. 24, No. 5, Mar. 1, 1985 pp. 609-611.
Horner, J. L. and Gianino, P. D. "Phase-Only Matched Filtering" Applied Optics, vol. 23, No. 6, Mar. 15, 1984, pp. 812-816.

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