Title:
THREE-DIMENSIONAL POSITION ESTIMATION DEVICE AND THREE-DIMENSIONAL POSITION ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/163124
Kind Code:
A1
Abstract:
This three-dimensional position estimation device (100) comprises a feature point extraction unit (11) for detecting an area corresponding to the face of a rider in an image captured by a camera (2) serving to image the interior of a vehicle and extracting a plurality of feature points in the detected area, an inter-feature-point distance calculation unit (12) for calculating a first inter-feature-point distance that is the distance between feature points for distance calculation from among the plurality of feature points, a face direction detection unit (13) for detecting the face direction of the rider, a head position angle calculation unit (14) for calculating a head position angle indicating the position of the head of the rider in relation to the imaging axis of the camera (2), an inter-feature-point distance correction unit (15) for using the detection result from the face direction detection unit (13) and the head position angle to correct the first inter-feature-point distance so as to produce a second inter-feature-point distance that is what the distance between the feature points for distance calculation would be if the parts of the head corresponding to the feature points for distance calculation were disposed along a plane parallel to the imaging surface of the camera (2), and a three-dimensional position estimation unit (16) for using the head position angle, the second inter-feature-point distance, and a reference inter-feature-point distance to estimate the three-dimensional position of the head.
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Inventors:
NAKAMATSU YUSUKE (JP)
SHIGETA ASAKO (JP)
WATANABE SHINTARO (JP)
TORAMA RYOSUKE (JP)
HIRANO TAKASHI (JP)
SHIGETA ASAKO (JP)
WATANABE SHINTARO (JP)
TORAMA RYOSUKE (JP)
HIRANO TAKASHI (JP)
Application Number:
PCT/JP2018/006931
Publication Date:
August 29, 2019
Filing Date:
February 26, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01B11/00; B60R11/04; G06T7/00; G06V10/44
Domestic Patent References:
WO2015186519A1 | 2015-12-10 |
Foreign References:
JP2009287936A | 2009-12-10 | |||
JP2008014825A | 2008-01-24 | |||
JP2011205321A | 2011-10-13 | |||
JP2006163900A | 2006-06-22 | |||
US20140313333A1 | 2014-10-23 |
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (JP)
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