Method and circuit arrangement for correction of image distortio

Details Method and circuit arrangement for correction of image distortio Method and circuit arrangement for correction of image distortio

1984-03-23

1987-03-03

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358142, 358163, 358284, H04N 514, H04N 708

Patent

active

046479724

ABSTRACT:
Method and apparatus for the correction of image distortion in the digital transmission of video signals, in which at the receiving end a comparison is made between the received signal values and estimated video signal values computed from adjacent video signal values. When a prescribed threshold value is exceeded by the amount of the difference between the video signal value and the associated estimated video signal value, the corresponding estimated video signal value is forwarded instead of the received video signal value. A feature of the present method and apparatus is their ability to distinguish edges of objects when there are sharp fluctuations in expected signal level values.

REFERENCES:
patent: 4376289 (1983-03-01), Reitmeier et al.
patent: 4464674 (1984-08-01), Schulz et al.
patent: 4498104 (1985-02-01), Schulz
patent: 4517600 (1985-05-01), Reitmeier

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