期刊
PHYSIOLOGICAL MEASUREMENT
卷 22, 期 3, 页码 N21-N28出版社
IOP PUBLISHING LTD
DOI: 10.1088/0967-3334/22/3/401
关键词
posture change; respiratory rate; sleeping pattern; image sequence analysis; optical flow
An image sequence analysis technique was developed to evaluate posture change and respiratory rate of a subject in bed without any physical contact. Although the image sequence analysis requires many calculations, the system can perform them in real time. The system consisted of a CCD video camera and a PC equipped with a high-speed image processor. To evaluate the system. we tested it on five subjects at a nursing home. The system evaluated 99.4% of the movements of subjects during the total monitoring time (about 61 hours). The waveform was flat when the subject was out of view of the video camera. The system has the possibility of evaluating not only posture changes and respiratory rate, but also sleeping patterns.
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