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Local Frequency

  • Gösta H. Granlund
  • Hans Knutsson
Chapter

Abstract

This chapter describes a technique for estimation of local signal frequency and bandwidth. Local frequency is an important concept useful for local structure analysis as well as for determining the appropriate range of scales for subsequent processing. 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 filters. The bandwidth is 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

Center Frequency Instantaneous Frequency Frequency Estimate Local Frequency Gabor Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 1995

Authors and Affiliations

  • Gösta H. Granlund
    • 1
  • Hans Knutsson
    • 1
  1. 1.Linköping UniversitySweden

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