Scanner calibration robust to lamp warm-up
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United States of America Patent
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Sep 15, 2009
Grant Date -
Mar 5, 2009
app pub date -
Aug 28, 2007
filing date -
Aug 28, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Systems and methods are described that facilitate calibrating a scanner by capturing a plurality of white calibration files and generating a mathematical function that models the scanner. For instance, a white calibration file can be captured before and after a page is scanned, and the function can be an average of offset and gain values for pixels in scanlines of the scanned page. Three or more white calibration files can be used to generate a linear function (e.g., using linear regression) or an exponential function describing the gain an offset values of the pixels.
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