Title:
MULTI-CAMERA IMAGING SYSTEM AND METHOD FOR COMBINING MULTI-CAMERA CAPTURED IMAGES
Document Type and Number:
WIPO Patent Application WO/2015/093147
Kind Code:
A1
Abstract:
The problem addressed by the present invention is, when detecting changes in degradation state such as cracks by imaging with a plurality of high-resolution cameras in a periodic inspection of a structure such as a concrete bridge, to be able to automatically perform a position, orientation, and dimension alignment and comparison among images captured at an interval of time at a high precision. To solve the problem, the present invention has the configuration as described below. An imaging system uses a plurality of cameras, represents a specific range of an image group in one coordinate system using alignment markers or common features of a captured subject among a plurality of images that image a structure that is the objective by means of the plurality of cameras, which have equivalent resolutions, and furthermore performs imaging by means of the plurality of cameras at a different time and similarly represents in one coordinate system a specific range of the image group captured at the time. At least two static markers or features are set that have the same position on a subject even between captures separated by time at a portion of the structure that is the subject across a wide range, the at least two static markers or features on the subject are detected in an image in the specific range of the captured images, a coordinate conversion process is performed on the coordinates of the at least two static markers or features in one coordinate system of a specific range of the captured images by applying the same coordinate values separated by time separately corresponding to the at least two static markers or features, and thus a correction value is obtained to the same coordinate system separated by time for the entirety of the captured images.
Inventors:
SAKANO SHINJI (JP)
NONAKA YUUICHI (JP)
NONAKA YUUICHI (JP)
Application Number:
PCT/JP2014/078433
Publication Date:
June 25, 2015
Filing Date:
October 27, 2014
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H04N5/225; G01B11/00; G03B15/00; G03B37/00; H04N5/232
Foreign References:
| JP2007026255A | 2007-02-01 | |||
| JPH09161068A | 1997-06-20 | |||
| JP2002328096A | 2002-11-15 | |||
| JP2008276299A | 2008-11-13 | |||
| JPH06317850A | 1994-11-15 | |||
| JP2007074611A | 2007-03-22 | |||
| JP2005124176A | 2005-05-12 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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