Apparatus for processing video signals received from an optical scanner
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United States of America Patent
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-
Jun 29, 1982
Issued Date -
N/A
app pub date -
Jan 2, 1981
filing date -
Apr 21, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
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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