Image reading apparatus and image reading method
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United States of America Patent
Stats
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Apr 17, 2012
Grant Date -
Sep 18, 2008
app pub date -
Mar 14, 2008
filing date -
Mar 14, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An image reading apparatus includes a first image generation unit configured to scan a document set with one edge aligned with a reference position of a document positioning plate to generate a first image, a second image generation unit configured to scan the document set with a second edge, side opposite to the first edge, aligned with the reference position of the document positioning plate to generate a second image, a detection unit configured to perform matching processing to match image data of the first image with image data of the second image to detect an offset between the first image and the second image, and a determination unit configured to determine a size of the document based on the offset detected by the detection unit. The second edge may be opposite the first. Alternatively, corners may be used instead of edges.
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