Document reading apparatus and image processing method
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United States of America Patent
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Jun 10, 2014
Grant Date -
Jun 21, 2012
app pub date -
Dec 12, 2011
filing date -
Dec 17, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A document reading apparatus, including: a conveyance portion which conveys a document; an illuminator which illuminates the conveying document; a reading portion which reads the conveying document at a read position; a reference member arranged opposite to the read position; a correction condition calculating portion which calculates a correction condition corresponding to each of a plurality of pixel positions based on image data obtained by the reading portion reading the reference member; and a correction portion which corrects image data of the document using the correction condition, wherein the correction condition calculating portion obtains a plurality of image data of the reference member corresponding to a first pixel position and its peripheral pixel position, and calculates a correction condition at the first pixel position based on remaining image data after excluding high brightness image data and low brightness image data.
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