Pulse wave velocity measurement method
First Claim
1. A pulse wave velocity measurement method comprising:
- an imaging step of simultaneously imaging mutually different two parts from among plural parts of a user'"'"'s human body in a non-contact state by a single visible light camera and generating continuous time series image data, said single visible light camera being configured for everyday use by the user;
a pulse wave detection step of detecting each pulse wave in the different two parts of the human body from the image data based on a temporal change in pixel value of the different two parts of the human body; and
a pulse wave velocity calculation step of calculating a pulse wave velocity of the human body based on a time difference between pulse waves in the different two parts of the human body.
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Abstract
The present invention provides a pulse wave velocity measurement method and system as well as an imaging device available for everyday use by general users at low cost with measurement accuracy less affected by posture or the like. The present invention simultaneously images different parts of a human body in a non-contact state by a single visible light camera and acquires continuous time series image data. Then, the present invention detects each pulse wave from the image data in the different parts of the human body based on a temporal change in pixel value of the different parts of the human body, and then calculates a pulse wave velocity of the human body based on a time difference between the pulse waves in the different parts of the human body.
12 Citations
17 Claims
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1. A pulse wave velocity measurement method comprising:
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an imaging step of simultaneously imaging mutually different two parts from among plural parts of a user'"'"'s human body in a non-contact state by a single visible light camera and generating continuous time series image data, said single visible light camera being configured for everyday use by the user; a pulse wave detection step of detecting each pulse wave in the different two parts of the human body from the image data based on a temporal change in pixel value of the different two parts of the human body; and a pulse wave velocity calculation step of calculating a pulse wave velocity of the human body based on a time difference between pulse waves in the different two parts of the human body. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A pulse wave velocity measurement method comprising:
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an imaging step of simultaneously imaging different two parts from among plural parts of a human body in a non-contact state by a single visible light camera and generating continuous time series image data; an optical information detection step of detecting temporal variation information about at least one of a light amount and a color of illumination light emitted to the different two parts of the human body from the image data based on a temporal change in pixel value at a reference region other than the different two parts of the human body; a correction step of correcting the image data so as to cancel an effect due to the temporal variation in the light amount or the color of the illumination light based on the variation information detected by the optical information detection step; a pulse wave detection step of detecting each pulse wave in the different two parts of the human body from the image data corrected by the correction step based on the temporal change in pixel value of the different two parts of the human body; and a pulse wave velocity calculation step of calculating a pulse wave velocity of the human body based on a time difference between pulse waves in the different two parts of the human body. - View Dependent Claims (8, 9, 10)
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11. A pulse wave velocity measurement method comprising:
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an imaging step of simultaneously imaging different two parts from among plural parts of a user'"'"'s human body in a non-contact state by a single visible light camera and generating continuous time series image data, said single visible light camera being configured for everyday use by the user; an interpolation step of generating interpolation data obtained by temporally interpolating a temporal change in pixel value of the different two parts of the human body from the image data; a pulse wave detection step of detecting each pulse wave in the different two parts of the human body based on the interpolation data; and a pulse wave velocity calculation step of calculating a pulse wave velocity of the human body based on a time difference between pulse waves in the different two parts of the human body. - View Dependent Claims (12, 13, 14)
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15. An imaging device comprising:
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an imaging unit that simultaneously images mutually different two parts from among plural parts of a user'"'"'s human body in a non-contact state by a single visible light camera and generates continuous time series image data, said single visible light camera being configured for everyday use by the user; a control unit; and a guide frame display unit that is controlled by said control unit to display an imaging guide frame corresponding to the mutually different two parts of the human body on a screen that is simultaneously displaying the image imaged by the imaging unit, thereby visually indicating whether the mutually different two parts are being properly imaged by said single visible light camera. - View Dependent Claims (16, 17)
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Specification