The low voltage level synchrophasor measurement data are investigated to estimate the damping ratio and to detect any oscillation mode using Fast Fourier Transform (FFT) and Continuous Wavelet Transform (CWT). Complex Morlet (CM) is selected as a mother wavelet function considering its ability to reveal time and frequency localization simultaneously. A Two Area Four Machine System (TAFMS) model...

In this paper we draw links between the widely used gammatone lter auditory model and wavelet theory. From the viewpoint of wavelet theory the beneet from linking these research elds is a fast method for the computation of a timescale representation. From the viewpoint of auditory ltering the beneets are the existence of methods for the detection of signal singularities and for resynthesis. Our...

A novel method of extracting heart rate and oxygen saturation from a video-based biosignal is described. The method comprises a novel modular continuous wavelet transform approach which includes: performing the transform, undertaking running wavelet archetyping to enhance the pulse information, extraction of the pulse ridge time-frequency information [and thus a heart rate (HRvid) signal], crea...

This paper presents methods for detection and localization of photon-limited objects in noise. As opposed to the correlation based or Fourier transform based techniques which exhibit sensitivity to object scaling, we propose a method based on the continuous wavelet transform with its ability to reject noise and to localize objects in space and time as well as in scale. An advantageous twist pre...

In this paper, we present an improved version of ECG delineation approach based on the continuous wavelet transform and singlescale approach. The algorithm was design to detect five main ECG significant points, which are QRS onset, QRS offset, T wave offset, P wave onset and P wave offset. The introduced approach was evaluated on the standard CSE multilead database. The obtained delineation res...

We give a simple method for constructing a projection from a surface of revolution M onto the plane perpendicular to the rotation axis, which preserves areas. Then we use this projection for constructing a multiresolution analysis and a continuous wavelet transform, starting from the existing planar constructions. Thus, the wavelets on M inherit all the properties of the corresponding planar wa...

This paper presents a new method on the use of the gammachirp auditory filter based on a continuous wavelet analysis. The gammachirp auditory filter is designed to provide a spectrum reflecting the spectral properties of the cochlea, which is responsible for frequency analysis in the human auditory system. The impulse response of the theoretical gammachirp auditory filter that has been develope...

Aims. We describe a fast, robust and automatic detection algorithm, TRUFAS, and apply it to data that are being expected from the CoRoT mission. Methods. The procedure proposed for the detection of planetary transits in light curves works in two steps: 1) a continuous wavelet transformation of the detrended light curve with posterior selection of the optimum scale for transit detection, and 2) ...

Ocean remotely sensed image analysis using two-dimensional continuous wavelet transforms Li-Chung Wu a , Laurence Zsu-Hsin Chuang b , Dong-Jiing Doong c & Chia Chuen Kao a a Department of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan, Taiwan b Institute of Ocean Technology and Marine Affairs, National Cheng Kung University, Tainan, Taiwan c Department of Marine Environ...

We have developed the theory and analog hardware implement-ation for a Cont.inuous Wavelet Transform (CWT). This novel circuit performs an orthogonal decomposition of temporal signals, such as speech, in a frequency range of IOHz to 20KHz. This multiresolution processor expands the Laguerre structure originally developed by Lee [4].