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Patent Searching and Data


Title:
METHOD FOR ESTIMATING ORIENTATION OF PERSON STANDING STILL
Document Type and Number:
WIPO Patent Application WO/2013/088517
Kind Code:
A1
Abstract:
A conventional method for estimating the orientation of a person constructs a pedestrian course model from changes in the location of a pedestrian at prescribed times, but a course model cannot be constructed for a person who is standing still without changing locations, making it impossible to estimate the orientation of the person. It is also impossible to estimate an orientation with a database pattern-matching method as used in an ordinary pedestrian model when the outward appearance, i.e., clothing, physique, and other attributes of a person who is stopped differs significantly from the person in the database. Accordingly, the present invention: detects the distal end of the foot from the ankle of a leg of a person in an image obtained from an image-capturing means and a boundary location of the lower leg and the foot, which is a rough boundary of the lower leg; detects feature values that make it possible to classify the ground and a location other than the ground within the image; sets a plurality of local regions having relative location information and/or relative orientation information with respect to the boundary location inside an edge region surrounding the boundary location; uses the ground-specific feature value to determine whether the respective local regions are the ground or a location other than the ground; determines the foot region from the local region determined to be a location other than the ground; and estimates the orientation of the foot from the local region classified as the foot region and the information.

Inventors:
UEDA TAISHI (JP)
NAKAMURA RYOSUKE (JP)
AMINO AZUSA (JP)
Application Number:
PCT/JP2011/078805
Publication Date:
June 20, 2013
Filing Date:
December 13, 2011
Export Citation:
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Assignee:
HITACHI LTD (JP)
UEDA TAISHI (JP)
NAKAMURA RYOSUKE (JP)
AMINO AZUSA (JP)
International Classes:
G06T7/60; G01B11/24
Foreign References:
JP2010152873A2010-07-08
JPH10269366A1998-10-09
JP2000207568A2000-07-28
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
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Claims: