Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Ideal Phase map Extraction Method and Filtering of Electronic Speckle Pattern Interferometry

전자 스페클 간섭법에서의 이상적인 위상도 추출과 필터링 방법

  • 강영준 (전북대학교 메카트로닉스 연구센터) ;
  • 이주성 (전북대학교 대학원(현 삼성탈레스㈜)) ;
  • 박낙규 (전북대학교 대학원) ;
  • 권용기 (전주공업대학교 기계과)
  • Published : 2002.12.01
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Abstract

Deformation phase can be obtained by using Least-Square fitting. In extraction of phase values, Least-Square Fitting is superior to usual method such as 2, 3, 4-Bucket Algorithm. That can extract almost noise-free phase and retain 2 $\pi$ discontinuities. But more fringes in phase map, 2 $\pi$ discontinuities are destroyed when that are filtered and reconstruction of deformation is not reliable. So, we adapted Least-Square fitting using an isotropic window in dense fringe. Using Sine/cosine filter give us perfect 2 $\pi$ discontinuities information. We showed the process and result of extraction of phase map and filtering in this paper.

Keywords

References

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