Signal processing circuits for charge-transfer, image-sensing ar

Details Signal processing circuits for charge-transfer, image-sensing ar Signal processing circuits for charge-transfer, image-sensing ar

1974-09-18

1977-01-04

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

357 24, 357 30, 250208, 250211J, 358167, 358213, H04N 314, H01L 2978, H01L 3100, H01J 3912

Patent

active

040015017

ABSTRACT:
During the serial shifting to an output buffer of the radiation induced charge signal accumulated in a row (or column) of an array, the successive signals are processed to improve the contrast of the sensed image. The portion of each signal of greater than a given amplitude is transmitted to a buffer stage and the remaining portion of each signal is removed. In one form of the invention, the signal-to-noise ratio is then enhanced at the expense of resolution by combining at the buffer the processed signal from a number of adjacent charge storage locations.

REFERENCES:
patent: 3581109 (1971-05-01), Olsson et al.
patent: 3704342 (1972-11-01), Stoddard et al.
patent: 3723642 (1973-03-01), Laakmann
patent: 3751586 (1973-08-01), Johansson
patent: 3806729 (1974-04-01), Caywood
patent: 3840740 (1974-10-01), Stewart
patent: 3845295 (1974-10-01), Williams et al.
patent: 3869565 (1975-03-01), Olsson
patent: 3919468 (1975-11-01), Weimer

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