Image reading apparatus for detecting a shadow region formed by end of conveyed document

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United States of America

PATENT NO 10516798
SERIAL NO

16124091

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Abstract

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An image processing apparatus includes a transparent member, a white reference member, an imaging device, a conveyance member, a light source, and a processor for detecting a dirt substance from the input image. The light source is provided such that a shadow of a leading end or rear end of the document conveyed on the transparent member is formed on the white reference member at the imaging position. The processor detects a shadow region formed by the leading end or rear end of the conveyed document from the input image and detects a dirt substance from within the detected shadow region.

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Patent Owner(s)

Patent OwnerAddress
PFU LIMITED98-2 NU UNOKE KAHOKU-SHI ISHIKAWA 929-1192

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kanaya, Shingo Kahoku, JP 14 50

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