Device for correcting contours in an image and use of such a dev

Details Device for correcting contours in an image and use of such a dev Device for correcting contours in an image and use of such a dev

1986-06-03

1988-05-31

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 964, H04N 909

Patent

active

047485000

ABSTRACT:
A device is provided for correcting the contours in an image comprising in the green channel a contour extraction circuit followed by a circuit for processing these contours. It also comprises in the red channel a second contour extraction circuit followed by a second circuit for processing the contours. A validation circuit only validates the contour signal coming from the red channel when the red level is relatively high with respect to the green level. In this case, the red contour signal is superimposed on the contour from the green channel for correcting the contours of the three chrominance channels, by means of a mixing circuit.

REFERENCES:
patent: 3681520 (1972-08-01), Schneider
patent: 3732360 (1973-05-01), Breimer et al.
patent: 4209801 (1980-06-01), Dischert et al.

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