Title:
DROWSINESS ESTIMATION DEVICE, DROWSINESS ESTIMATION METHOD, AND COMPUTER-READABLE NON-TRANSIENT RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2014/054293
Kind Code:
A1
Abstract:
A drowsiness estimation device comprises a photography unit (1), a per-site temperature computation unit (6), and a weighting subtraction unit (7). The photography unit (1) obtains visible light image data in a visible light photography mode, and obtains, in an infrared photography mode, infrared image data which denotes a body surface temperature distribution of a body image of a subject. The per-site temperature computation unit (6) detects a temperature of a central region of an eye among the body surface temperature distribution which is denoted in the infrared image data. The weighting subtraction unit (7) carries out a correction on a temperature parameter for drowsiness estimation, with the detected temperature of the central region of the eye as a reference. An estimation of a user's drowsiness is thus carried out in accordance with the corrected parameter.
Inventors:
MATSUO MASATOSHI
Application Number:
PCT/JP2013/005924
Publication Date:
April 10, 2014
Filing Date:
October 04, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
A61B5/18; A61B5/01; B60K28/06
Foreign References:
| JP2007068620A | 2007-03-22 | |||
| JPH053876A | 1993-01-14 | |||
| JP2007516018A | 2007-06-21 | |||
| JP2010133692A | 2010-06-17 |
Attorney, Agent or Firm:
NAKAJIMA, Shiro et al. (JP)
Shiro Nakajima (JP)
Shiro Nakajima (JP)
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