A method for evaluating water surface fluctuation during bathing

Author

Nakajima, Kazuki

Author_Institution

Dept. of Gerontechnol., Nat. Inst. for Longevity Sci., Aichi, Japan

Volume

2

fYear

1999

fDate

36434

Abstract

A method has been developed for evaluating water surface fluctuation during bathing. Part of a laser beam reflects specularly on the water surface and its trajectory on the wall reflects the fluctuation of the water surface. The trajectory image sequence is analyzed using an image sequence processing based on spatial filtering. Both frequency and amplitude responses of the new method were inspected using an artificial wave generator. The spectral peak is obtained at the same frequency from the generator. The power of the spectral peak increases in proportion to the voltage of the generator. Heart rate, respiratory rate and activity during bathing were evaluated for healthy subjects (n=10). Results from this method were equal to those from contact methods in rates recorded. The slope of the power spectrum reflects the activity during bathing

Keywords

biomechanics; cardiology; image sequences; laser applications in medicine; light reflection; medical image processing; spectral analysis; activity during bathing; artificial wave generator; healthy subjects; heart rate; laser beam reflection; power spectrum slope; respiratory rate; spectral peak; water surface fluctuation evaluation method; Filtering; Fluctuations; Frequency; Image analysis; Image sequence analysis; Image sequences; Laser beams; Power generation; Surface emitting lasers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint

Conference_Location

Atlanta, GA

ISSN

1094-687X

Print_ISBN

0-7803-5674-8

Type

conf

DOI

10.1109/IEMBS.1999.803850

Filename

803850