Apparatus for processing video signals received from an optical

Details Apparatus for processing video signals received from an optical Apparatus for processing video signals received from an optical

1981-01-02

1982-06-29

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

G06K 938

Patent

active

043374557

ABSTRACT:
An apparatus for processing video signals received from an optical scanner is described. A comparator means is used for comparing the video signals with a dynamic threshold voltage. This threshold voltage is generated by a peak detector circuit which also receives the video signals. The peak detector circuit includes decay means for decaying signals representative of the detected peaks at a predetermined rate. This thresholding technique provides compensation for a wide dynamic range of video signals received from a photodiode array.

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