Title:
PULSE WAVE DETECTION DEVICE, VEHICULAR DEVICE, AND PULSE WAVE DETECTION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/050357
Kind Code:
A1
Abstract:
The objective of the invention is to appropriately detect a pulse wave even when the luminance changes due to a subject moving relative to lighting. When a face moves closer to a camera or a lighting device, the luminance becomes higher while the surface area of the face becomes larger. Conversely, when the face moves away from the camera or lighting device, the luminance becomes lower while the surface area of the face also becomes smaller. Since the luminance and the size of the face have such a correlation, this pulse wave detection device (1) detects the face from a frame image and corrects the luminance of the face on the basis of the size of the face. As the luminance of the face depends on the distance between the lighting and the face, this results in the distance from the lighting to the face being measured indirectly by the size of the face. In this way, the pulse wave detection device (1) uses the correlation between the change in luminance and the size of the face of the subject in the frame image to correct the magnitude of the luminance of the face pictured in the frame image by the size of the face, and then, from the post-correction luminance signal, estimates/measures the pulse rate of the subject.
Inventors:
JONES MICHAEL (JP)
SATO ATSUSHI (JP)
SATO ATSUSHI (JP)
Application Number:
PCT/JP2019/034946
Publication Date:
March 12, 2020
Filing Date:
September 05, 2019
Export Citation:
Assignee:
EQUOS RES CO LTD (JP)
International Classes:
A61B5/02
Foreign References:
| JP2011130996A | 2011-07-07 | |||
| JP2016193021A | 2016-11-17 | |||
| JP2018114266A | 2018-07-26 | |||
| JP2014198201A | 2014-10-23 | |||
| JP2016193022A | 2016-11-17 |
Other References:
D. TEICHMANNC. BRUSERB. EILEBRECHTA. ABBASN. BLANIKS. LEONHARDT: "Non-contact Monitoring Techniques - Principles and Applications", PROC. IEEE ENG., MED. BIOL. SOC. 34TH ANN. INT. CONF., SAN DIEGO, CA, USA, 2012, pages 1302 - 1305, XP032463161, DOI: 10.1109/EMBC.2012.6346176
See also references of EP 3847955A4
See also references of EP 3847955A4
Attorney, Agent or Firm:
NAKANO Hitoshi et al. (JP)
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