Blemish compensating system for a solid state image pick-up devi

Details Blemish compensating system for a solid state image pick-up devi Blemish compensating system for a solid state image pick-up devi

1979-01-08

1980-12-02

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358213, H04N 534

Patent

active

042374880

ABSTRACT:
There is provided a blemish compensating system used for a solid state image pick-up device having a plurality of image pick-up elements which are arranged to store electric charges corresponding to an optical image formed on the light sensitive portions thereof and are sequentially energized by a driving circuit to derive out the electric charges stored on the respective image pick up elements. The blemish compensating system includes a memory which stores address data representing the position of a blemish image pick-up element and produces an output signal when the address of the memory storing the address data for the blemish image pick-up element is specified by a signal in synchronism with the output of the driver circuit, a delay circuit for delaying the output signal of the solid state image pick-up device by a time required for one horizontal scanning, and a switch circuit in which, when it is at a first switching position, it permits the output signal of the solid state image pick-up device to pass therethrough, and in which, in response to the output signal from the memory circuit, it is set to a second switching position so that it permits the output signal from the solid state image pick-up device by way of the delay circuit to pass therethrough.

REFERENCES:
patent: 2996576 (1961-08-01), Dolby
patent: 3869567 (1975-03-01), Covington
patent: 3949162 (1976-04-01), Malueg
LeCouteur, BBC Research Department "The Electronic Concealment of Blemishes on the Output of Solid State Sensors", Aug. 1977.

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