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A novel framework based on partial least squares (PLS) and multivariate empirical mode decomposition (MEMD) is proposed to effectively evaluate heart rate from webcam videos captured during illumination changing conditions. The framework takes the assumption that both facial region of interest (ROI) and background ROI have the similar illumination variations and the background ROI can be treated as...
Skin-based biometrics rely on the distinctiveness of skin patterns across individuals for identification. In this paper, we investigate whether small image patches of the skin can be localized on a user's body, determining not “who?” instead “where?” Applying techniques from biometrics and computer vision, we introduce a hierarchical classifier that estimates a location from the image texture and...
An optical diagnostic system to investigate the vacuum breakdown under microsecond pulsed voltage is constructed, which consists of a vacuum breakdown chamber of a high-voltage pulse driver and a high speed camera system. The jitter of the breakdown time delay is on the range of microsecond. To determine the moment of exposure, the gate-monitor output is compared with discharge current measured by...
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