Processor for emphasizing edges of a video signal

Details Processor for emphasizing edges of a video signal Processor for emphasizing edges of a video signal

1987-12-07

1989-06-27

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358168, 358169, H04N 5202, H04N 557

Patent

active

048434728

ABSTRACT:
A processing apparatus emphasizes edges of a video signal which is applied thereto and non-linear relative to density or luminance levels adapted for the reproduction of a video signal. The processing apparatus includes a linear converter for converting the non-linear video signal into a linear video signal. The linear video signal is applied to an edge emphasizing unit to produce a linear edge-emphasized video signal. A non-linear converter is provided for applying non-linear processing to the linear edge-emphasized video signal, whereby a non-linear edge-emphasized video signal is achieved.

REFERENCES:
patent: 3389220 (1968-06-01), Buzan
patent: 4480268 (1984-10-01), Osawa
patent: 4651210 (1987-03-01), Olson

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