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Patent Searching and Data


Title:
AUTOMATIC CAMERA INSPECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/131351
Kind Code:
A1
Abstract:
[Problem] To provide a camera inspection system capable of automatically and easily determining whether the calibration of a camera mounted on a railway vehicle is necessary. [Solution] The camera inspection system according to the present embodiment comprises an image-capturing unit mounted on a railroad vehicle and capturing images of signs provided around a track on which the railroad vehicle travels, from first and second viewpoints. An arithmetic processing unit obtains the parallax between a first image of a sign in the first viewpoint and a second image of a sign in the second viewpoint. The arithmetic processing unit calculates a first distance between the railroad vehicle and the sign on the basis of the parallax between the first image and the second image. The arithmetic processing unit calculates a second distance between the railroad vehicle and the sign on the basis of known attribute information regarding the size and/or position of the sign and the length of the attribute information on the first or second image. The arithmetic processing unit determines whether or not the difference between the first distance and the second distance is larger than a threshold value. A storage unit stores attribute information.

Inventors:
TAKAHASHI YUSUKE (JP)
KOBAYASHI HIROYUKI (JP)
SETO NAOTO (JP)
YAMASAKI YOSHIAKI (JP)
HORIE MASAHIRO (JP)
FUTAGAMI TAKUYA (JP)
HATTORI YOHEI (JP)
ITO HIROAKI (JP)
KATO NORIYASU (JP)
HORIGUCHI KAZUTOSHI (JP)
Application Number:
PCT/JP2020/041615
Publication Date:
July 01, 2021
Filing Date:
November 06, 2020
Export Citation:
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Assignee:
TOSHIBA KK (JP)
TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORP (JP)
International Classes:
B61L23/00; B60L3/00; G06T7/00; G06T7/593; G06T7/80; H04N5/232; H04N17/00
Domestic Patent References:
WO2018179281A12018-10-04
WO2017057057A12017-04-06
Foreign References:
JP2008304248A2008-12-18
JP2017032356A2017-02-09
JP6122365B22017-04-26
JP2019084881A2019-06-06
JP2019188996A2019-10-31
Attorney, Agent or Firm:
NAKAMURA Yukitaka et al. (JP)
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