Abstract
This paper proposes a contour-line-based feature and analyzes its relationship with blood pressures. The proposed method extracts an existence and a variation property from the contour lines drawn on the waveform. The existence property is the total length of the contour line in the waveform. The variation property is the number of intersection points of the waveform and contour lines. The proposed feature is a quite different from the conventional feature, which is extracted from peak wave height. We made a comparative experiment whose participants are 71 females with ages ranging between 18 and 94 years. The result showed that the proposed feature was obtained highly correlation with the blood pressure than the conventional peak feature.
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