Compensation circuit for the correction of image defects of a te

Details Compensation circuit for the correction of image defects of a te Compensation circuit for the correction of image defects of a te

1990-04-09

1992-05-12

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358168, 358169, H04N 5213, H04N 5235

Patent

active

051132583

ABSTRACT:
In a compensation circuit for the correction of image defects of an image projection system according to the control layer principle, in particular of an eidophor projector, a compensation signal is produced from signals associated with three adjacent lines, using an adder followed by a coefficient multiplier in order to produce a compensation signal. The amplitude of the compensation signal assumes a maximum value for low values of an intermediate image point in a single column image matrix of a video signal and a minimum value for high levels of the intermediate image point.

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