Blurred image processing method for direction and amplitude measurement of high frequency vibration

Chaofeng Wang, Li Liu, Guobao Wang, Shigang Wang

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

According to the corresponding relationship between vibration blurred image and static image in frequency domain, that is a set of negative ripples appears in spectrums of blurred image corresponding to zero values of the zero order Bessel function, a direction and amplitude measurement method is introduced. Some steps should be carried out to detect the directions and locations of Bessel ripples in spectrums of blurred image; they are: 2D-Fourier transform, histogram equalization, Radon transform and so on. The method is proved robust and can be used to measure vibration in arbitrary directions, in addition, the measurement results of amplitude can reach sub-pixel precision.

Original languageEnglish (US)
JournalZhendong yu Chongji/Journal of Vibration and Shock
Volume24
Issue number5
StatePublished - Oct 1 2005
Externally publishedYes

Keywords

  • 2D-Fourier transform
  • Bessel ripples
  • Histogram
  • Spectrum
  • Vibration-blurred image

ASJC Scopus subject areas

  • Civil and Structural Engineering

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