Scanning apparatus and method calculates distortion boundary of distortion area based on shadow values to correct scanned image
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United States of America Patent
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Apr 17, 2012
Grant Date -
Jun 4, 2009
app pub date -
Sep 11, 2008
filing date -
Dec 3, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A scanning apparatus which scans an image of a document to generate an image data, the scanning apparatus includes: a boundary sensing unit to sense a boundary of the image, and a distortion area, a distortion boundary of which is not sensed; a shadow calculating unit to calculate a shadow value of the image data; and a control unit to calculate the distortion boundary of the distortion area according the shadow values of the distortion area so as to correct distortion of an image caused by variations in focal distances between the image and the lenses within the scanning apparatus.
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