Adaptive image enhancement system

Details Adaptive image enhancement system Adaptive image enhancement system

1980-07-28

1982-06-08

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358138, H04N 514

Patent

active

043342442

ABSTRACT:
An image enhancement system in which a running average of a group of digitized samples of a video signal and a median of a group of digitized samples are processed to form a gradient sample. The gradient sample is scaled in response to the noise level of the video signal. The gradient samples, average samples, and medium samples are combined by a processor which generates a corresponding sequence of output samples that are converted into an enhanced video signal from which an image is produced. The processor provides image edge enhancement for high gradients while providing increased noise filtering for low gradients.

REFERENCES:
patent: 3462547 (1969-08-01), Macovski
patent: 3621129 (1971-11-01), Fisher
patent: 4121248 (1978-10-01), Coale, Jr.

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