Interaction of images with strain waves to derive Fourier transf

Details Interaction of images with strain waves to derive Fourier transf Interaction of images with strain waves to derive Fourier transf

1976-06-29

1977-12-27

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 314

Patent

active

040657914

ABSTRACT:
A system relying on the interaction of images and strain waves uses a technique called pseudo-beam steering to obtain selected components of the two-dimensional Fourier transform of the images. In pseudo-beam steering, two intersecting strain waves are controlled so as to produce the desired effects of a third wave without actually producing such third wave. These desired effects, produced by the interaction of the two intersecting waves, correspond to the effects which would have been produced by a third wave whose direction of travel and whose frequency could be controlled as desired.

REFERENCES:
patent: 3836712 (1974-09-01), Kornreich et al.

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