Image analysis nonlinear adaptive filter for improving signal-to

Details Image analysis nonlinear adaptive filter for improving signal-to Image analysis nonlinear adaptive filter for improving signal-to

1978-01-05

1980-04-15

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

Impedance matching

333174, 333176, 333178, H03H 710, H03H 714

Patent

active

041986121

ABSTRACT:
A nonlinear adaptive filter for improving the signal-to-noise ratio of video signals generated from images of features under analysis typically includes filtering components for attenuating low amplitude video noise excursions while passing high amplitude video signal excursions substantially without attenuation. Attenuation of the noise is provided by electrical circuitry operating as a function of the voltage input. In general, the electrical circuitry has a predetermined relationship to the value of the video signal and its noise characteristic.

REFERENCES:
patent: 2514022 (1950-07-01), Bedford
patent: 3524081 (1970-08-01), Campanella

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