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We investigated the estimation of blood pressure (BP) based on the pulse transit time (PTT) and regression forests and propose a noncontact PTT measurement system using microwave and image sensors. The PTT is the time difference between an electrocardiogram and photoplethysmogram recorded in a certain body region and considered a potential indicator of blood pressure. The aim of the present study...
A method of monitoring a driver's heart rate using a microwave sensor on a seat backrest is proposed. The heartbeat signal was learned as a template while the car engine idled. This template was used to calculate correlation between observed signals. The proposed method amplifies a weak heartbeat signal and reduces road noise. A basic experiment was conducted on an actual road at low speed. The proposed...
In this study, we propose a method for estimating fixation distance on the basis of measurements of vergence eye movements. The aim of this approach is to control the lens focus of automatic focusing glasses. To reduce user effort at the time of calibration, the calibration was performed at infinite distance gazing, and the parameters were determined from the premeasured pupillary distance at infinity...
This paper proposes a method for estimating the state of mind on observation of the body motion from the front and the side of a subject using 2 cameras. There are many researches that studied about the estimation of a psychological condition using facial features. For example, there are studies about facial expressions, eyes' motion and the facial thermal images using a specific camera. Observation...
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