نتایج جستجو برای: wavelet transform

تعداد نتایج: 136653  

Journal: :Indian Journal of Science and Technology 2016

Journal: :ADCAIJ: Advances in Distributed Computing and Artificial Intelligence Journal 2020

Journal: :Image Analysis & Stereology 2011

Journal: :International journal of Computer Networks & Communications 2014

This paper introduces the optimization algorithm to improve search rate in urban path routing problems using viral infection and local search in urban environment. This algorithm operates based on two different approaches including wavelet transform and genetic algorithm. The variables proposed by driver such as degree of difficulty and difficulty traffic are of the essence in this technique. W...

Journal: :the modares journal of electrical engineering 2005
hamed hasanvand soodabeh soleymani behnam feizifar bashir bakhshideh zad

this paper illustrates the application of s-transform and continuous wavelet transform (cwt) for fault location in combined overhead line and cable distribution networks. the high frequency transient signals originated by faults are analyzed using s-transform and cwt. the s-transform is found to be applicable in transient based fault location in distribution networks. this technique is an expan...

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 2000
Huilin Xiong Tianxu Zhang Y. S. Moon

Xiong et al. presented a translationand scale-invariant adaptive wavelet transform. We show that their renormalized signal (pre-wavelet transform) is already translation- and scale-invariant. Thus, it is not just invariant under the wavelet transform. We give a necessary and sufficient condition for renormalized signals to be affine transform invariant.

2012
N. Vasudha

The Wavelet transform has emerged over recent years as a key time frequency analysis and coding tool for the Electrocardiogram (ECG). Its ability to separate out pertinent signal components has led to a number of wavelet based techniques which supersede those based on traditional Fourier methods. It is interesting to note that researchers in the field of Wavelet transform tend to take an approa...

1999
Wei Zhao Raghuveer M. Rao

In this paper we present a new form of wavelet transform. Unlike the continuous wavelet transform (CWT) or discrete wavelet transform (DWT), the mother wavelet is chosen to be a discrete-time signal and wavelet coefficients are computed by correlating a given discrete-time signal with continuous dilations of the mother wavelet. The results developed are based on the definition of a discrete-tim...

Journal: :Journal of Multimedia 2007
Gajanan K. Kharate Varsha Hemant Patil Niranjan L. Bhale

Recently discrete wavelet transform and wavelet packet has emerged as popular techniques for image compression. The wavelet transform is one of the major processing components of image compression. The results of the compression change as per the basis and tap of the wavelet used. This paper compares compression performance of Daubechies, Biorthogonal, Coiflets and other wavelets along with res...

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