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Patent Searching and Data


Title:
IMAGE READING DEVICE, CONTROL METHOD AND CONTROL PROGRAM
Document Type and Number:
WIPO Patent Application WO/2017/149732
Kind Code:
A1
Abstract:
The present invention provides an image reading device which determines, with high precision, the position at which foreign matter is present. The image reading device has: an image capturing unit which is provided in a first unit or a second unit and captures a first image and a second image; a reference member which is provided on the first unit or the second unit; a driving unit which moves the second unit; a foreign matter determining unit which determines whether foreign matter is captured in the first image; and a position determining unit which, when the foreign matter is captured in the first image, determines whether the position at which the foreign matter is present is at the image capturing unit side or the reference member side on the basis of the absolute value of the difference between a gradation value of the first image in an area in which the foreign matter is captured and a gradation value of the second image in an area corresponding to the area in which the foreign matter is captured, wherein the first image is obtained by installing the second unit at one side in a first position or a second position and capturing an image of the reference member, and the second image is obtained by installing the second unit at the other side in the first position or the second position and capturing an image of the reference member.

Inventors:
KANAYA SHINGO (JP)
Application Number:
PCT/JP2016/056656
Publication Date:
September 08, 2017
Filing Date:
March 03, 2016
Export Citation:
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Assignee:
PFU LTD (JP)
International Classes:
G06T1/00; H04N1/19; H04N1/04; H04N1/409
Foreign References:
JP2012204972A2012-10-22
JP2010010867A2010-01-14
JP2005065033A2005-03-10
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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