Title :
Local multiscale frequency and bandwidth estimation
Author :
Knutsson, Hans ; Westin, Carl-Fredrik ; Granlund, Gösta
Author_Institution :
Dept. of Electr. Eng., Linkoping Univ., Sweden
Abstract :
This paper describes a robust algorithm for estimation of local signal frequency and bandwidth. The method is based on combining local estimates of instantaneous frequency over a large number of scales. The filters used are a set of lognormal quadrature wavelets. A novel feature is that an estimate of local frequency bandwidth can be obtained. The bandwidth can be used to produce a measure of certainty for the estimated frequency. The algorithm is applicable to multidimensional data and examples of the performance of the method are demonstrated for one-dimensional and two-dimensional signals
Keywords :
filtering theory; frequency estimation; signal representation; wavelet transforms; filters; instantaneous frequency; local multiscale bandwidth estimation; local multiscale frequency estimation; local signal bandwidth; local signal frequency; lognormal quadrature wavelets; multidimensional data; one-dimensional signals; performance; signal representation; spectrum variance estimation; two-dimensional signals; Bandwidth; Computer vision; Fourier transforms; Frequency estimation; Frequency measurement; Gabor filters; Laboratories; Multidimensional systems; Robustness; Signal analysis;
Conference_Titel :
Image Processing, 1994. Proceedings. ICIP-94., IEEE International Conference
Conference_Location :
Austin, TX
Print_ISBN :
0-8186-6952-7
DOI :
10.1109/ICIP.1994.413270
