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Ideal Phase map Extraction Method and Filtering of Electronic Speckle Pattern Interferometry  

강영준 (전북대학교 메카트로닉스 연구센터)
이주성 (전북대학교 대학원(현 삼성탈레스㈜))
박낙규 (전북대학교 대학원)
권용기 (전주공업대학교 기계과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.19, no.12, 2002 , pp. 20-26 More about this Journal
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
ESPI; Phase Shifting Method; Least Square Fitting; Sine/cosine Filter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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