Output correction in image reproduction
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United States of America Patent
Stats
-
Apr 21, 1987
Grant Date -
N/A
app pub date -
Jun 19, 1985
filing date -
Aug 24, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Calibration and shading correction of output image data of a photosensor array are carried out simultaneously by varying the gain and offset value of a photosensor amplifier in synchronism with input scanning of an original. The variation of gain and offset is made as a function of a first density reference voltage obtained by scanning a first density reference board, a second density reference voltage obtained by scanning a second density reference board and ideal voltages corresponding to the first and the second density reference voltages.
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