Circuit arrangement for increasing the definition of color conto

Details Circuit arrangement for increasing the definition of color conto Circuit arrangement for increasing the definition of color conto

1986-11-19

1988-04-19

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 964

Patent

active

047393955

ABSTRACT:
The invention relates to a circuit arrangement for increasing the resolution of color contours. A slope detector detects the slope of the luminance signal and, when a predetermined slope value is exceeded, produces a detection signal for energizing a counter. The counter controls an edge enhancement circuit for a color difference signal, in which, as soon as the counter is energizing, the value of the color difference signal is stored and is available as an output signal. After a predetermined number of equidistant clock pulses has been counted, the edge enhancement circuit (7, 16) supplies the actual color difference signal value. If before the end of the counting operation, a new detection signal is produced, then the edge enhancement circuit briefly receives and stores the actual color difference signal value, and the counter starts a new counting cycle.

REFERENCES:
patent: 3778543 (1973-12-01), Lowry

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