Wavelet transform based on digital speckle correlation method : principle and algorithm

Research output: Journal Publications and ReviewsRGC 22 - Publication in policy or professional journal

1 Scopus Citations
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  • Hong Miao
  • Fei Ge
  • Zhenyu Jiang
  • Xiaoping Wu
  • Jian Lu


Original languageEnglish
Pages (from-to)402-405
Journal / PublicationProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2001
Externally publishedYes


Title3th Conference on Experimental Mechanics
Period15 - 17 October 2001


A new digital speckle correlation method, the Wavelet Transform based DSCM (WTDSCM) is presented. By this method, the two images of an object before and after loading can be expanded into two series of sub-images according to their frequency band respectively by wavelet transform. Choosing the suitable sub-images pairs mainly contributed by signal speckles, and then inducing the DSCM to calculate the deformation of the object, the probability of mismatch caused by noise could be reduced and the precision of DSCM can be improved. The experimental calibration results indicate that the precision of the WTDSCM is higher than normal DSCM.

Research Area(s)

  • Deformation measurement, Digital speckle correlation method (DSCM), Wavelet transform