Browse > Article

Detection of Inflection Point of Waveform Using Wavelet Thresholding and Natural Observation Filter  

Kim, Tae-Soo (Division of Information and Communication Engineering, Uiduk University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.42, no.4, 2005 , pp. 127-132 More about this Journal
Abstract
The curve of motion indicated to waveform of the fast movement of human extracted using virtual reality or the quantity of time fluctuation of the electromagnetic signal as the quantity of electric fluctuation of the atmosphere is complex. It is important to decide exactly the signal property as the inflection point for the observation signal. When the signal is mixed by noise signal, the traditional method is difficult to detect the inflection point. In this paper the noisy signal is eliminated by wavelet thresholding method and the filter using natural observation theorem is applied. It shows that the inflection point of the signal waveform can be detected exactly.
Keywords
Wavelet thresholding; Inflection point; Natural observation filter;
Citations & Related Records
연도 인용수 순위
  • Reference
1 D.L. Donoho, and I. Johnstone,' Ideal adaptation via wavelet shrinkage', Biometrika, vol. 81, pp. 425-455, 1994   DOI   ScienceOn
2 Manoru IWAKI and Taizo IIJIMA, 'Natural Observation Method Discrete-Time Waveforms', Journal of MCE (A), Vol. J79-A, no. 3, pp. 728-735, March. 1996
3 Kan OKUBO and Nobunao TAKEUCHI, 'Detection of Inflection Point of Time Series Data by Natural Observation Filter', Journal of ICICE (A), Vol. J86-A, no. 11, pp. 1170-1178, November. 2003
4 A. V. Oppenheim and R. W. Schafer, 'Digital Signal Processing', Englewood Cliffs, NJ: Prentice-Hall, 1975
5 R. M. Rao, A.S. Bopardikar, 'Wavelet Transforms Introduction to Theory and Applications' Addison-Wesley, 1998
6 Bindiganvavale R. and Badler N. I., 'Motion abstraction and mapping with spatial constraints. In Modeling and Motion capture Techniques for Virtual Environments', International Workshop, CAPTECH'98, pages 70-82, Nov. 1998
7 Taizo IIJIMA and Manoru IWAKI,' Fundamental Theory of Natural Observation Method with Complete Reconstruction Property by Finite Sum -Natural Observation Theory of Normal type- ', Journal of ICICE (A), Vol. J79-A, no. 1, pp. 77-87, Jan. 1996