Image reading apparatus correcting noise in image data
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United States of America Patent
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May 18, 2010
Grant Date -
Mar 30, 2006
app pub date -
Dec 27, 2004
filing date -
Sep 30, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
An image reading apparatus includes, with the purpose of accurately correcting noise in an image due to dust on a platen, three line sensors spaced from each other in a sub scanning direction to scan an original in the sub scanning direction, a platen between the original and the three line sensors, a moving mechanism for moving the platen, a noise detection processor detecting a noise pixel from each of multiple data output from the three line sensors, a second pixel extractor extracting a second pixel present in first data for correcting the noise pixel, based on a value of a first pixel present in second data different from the first data and corresponding to the same location on the original as the noise pixel, and a corrector correcting the noise pixel based on the extracted second pixel.
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