Wavelet analysis for characterizing human electroencephalogram signals

Bai-Lian Li; Hsin-i Wu

doi:10.1117/12.205445

6 April 1995 Wavelet analysis for characterizing human electroencephalogram signals

Bai-Lian Li, Hsin-i Wu

Proceedings Volume 2491, Wavelet Applications II; (1995) https://doi.org/10.1117/12.205445
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

Wavelet analysis is a recently developed mathematical theory and computational method for decomposing a nonstationary signal into components that have good localization properties both in time and frequency domains and hierarchical structures. Wavelet transform provides local information and multiresolution decomposition on a signal that cannot be obtained using traditional methods such as Fourier transforms and distribution-based statistical methods. Hence the change in complex biological signals can be detected. We use wavelet analysis as an innovative method for identifying and characterizing multiscale electroencephalogram signals in this paper. We develop a wavelet-based stationary phase transition method to extract instantaneous frequencies of the signal that vary in time. The results under different clinical situations show that the brian triggers small bursts of either low or high frequency immediately prior to changing on the global scale to that behavior. This information could be used as a diagnostic for detecting the onset of an epileptic seizure.

Citation Download Citation

Bai-Lian Li and Hsin-i Wu "Wavelet analysis for characterizing human electroencephalogram signals", Proc. SPIE 2491, Wavelet Applications II, (6 April 1995); https://doi.org/10.1117/12.205445

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