Method and circuit for correcting image edge

Details Method and circuit for correcting image edge Method and circuit for correcting image edge

1990-12-21

1992-09-29

Boudreau, Leo H.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

382 22, 358166, 307263, H04N 5208

Patent

active

051517876

ABSTRACT:
An edge correction circuit and method for enhancing image definition by reducing a conversion time at an region of a luminance signal in a digital image processor, said method including the steps of and the circuitry for: (a) generating a first control signal by detecting a pixel where a image luminance signal starts to change; (b) converting and outputting a pixel level state which is the same as the state before conversion of an edge region while said first control signal is being generated; (c) generating a second control signal by detecting a pixel prior to the luminance signal stabilization; and (d) outputting a pixel level state which is the same as the state after a complete conversion of the edge region which the second control signal generates.

REFERENCES:
patent: 4553042 (1985-11-01), Batterman
patent: 4918528 (1990-04-01), Oohashi
patent: 5050223 (1991-09-01), Sumi

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