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http://dx.doi.org/10.5909/JBE.2013.18.4.543

A Method for Motion Artifact Compensation of PPG Signal  

Kim, Hansol (Department of Digital Media, Sangmyung University)
Lee, Eui Chul (Department of Computer Science, Sangmyung University)
Publication Information
Journal of Broadcast Engineering / v.18, no.4, 2013 , pp. 543-549 More about this Journal
Abstract
Motion artifacts of central and autonomic nervous system signals degrades the performance of the bio-signal based human factor analysis. Firstly, we propose a defining method of motion artifact section by analyzing successive image frames. Motion artifact section is defined when the amount of motion is greater than the pre-defined threshold. In here, the amount of motion is estimated by first derivation of image frames at temporal domain. Secondly, we propose another defining method of motion artifact section through designing 2D Gaussian probability density function model by analyzing feature vectors of one cycle of signal such as length and amplitude. The defined motion artifact sections are interpolated on the basis of 1D Gaussian function. At result of applying the method into photoplethysmography signal, we confirmed that the calculated heartbeat rate from the restored photoplethysmography came up to the one from electrocardiography. Also, we found that the video based method generated relatively more false acceptance of motion artifact section and the probability density function based method generated relatively more false rejection of motion artifact section.
Keywords
Signal restoration; Motion artifact; Photoplethysmography; Electrocardiography;
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