Digital volume correlation in an environment with intensive salt-and-pepper noise and strong monotonic nonlinear distortion of light intensity

• Autorzy: Tu P. , Bai Y. , Xu W. , Dong B. , Ye S. , Yang Q. , Zhou Y.

Identyfikatory

DOI

10.5277/oa170204

• Języki publikacji: EN

Abstrakty

EN

Digital volume correlation is an image-based technique for internal 3D displacement and strain fields measurement or analysis widely used in the field of experimental mechanics. A widely used correlation function (criterion) of digital volume correlation is Pearson correlation function, which suffers from the problem of the acquired data being contaminated by salt-and-pepper noise and monotonic nonlinear distortion of the light intensity. In this work, a 3D correlation function called the Spearman correlation function is used to deal with those interferences. A numerical experiment shows that the performance of Spearman correlation function using integer-pixel registration in an environment with 10% salt-and-pepper noise is better than that of Spearman and Pearson correlation functions using sub-pixel registration in an environment with 1% salt-and-pepper noise. As the light intensity distortion is significant, the error of Pearson correlation function is considerable; meanwhile, the error of Spearman correlation function is small. In conclusion, Spearman correlation function is, in particular, practical and useful in digital volume correlation.

Słowa kluczowe

EN

digital volume correlation; correlation function; salt-and-pepper noise; nonlinear effects

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2017
• Tom: Vol. 47, nr 2
• Strony: 209--223
• Opis fizyczny: Bibliogr. 27 poz., rys., tab.

Twórcy

autor

Tu P.

• School of Automation, Guangdong University of Technology, Guangzhou, P.R. China, 510006

autor

Bai Y.

• School of Automation, Guangdong University of Technology, Guangzhou, P.R. China, 510006

autor

Xu W.

• School of Automation, Guangdong University of Technology, Guangzhou, P.R. China, 510006

autor

Dong B.

• School of Automation, Guangdong University of Technology, Guangzhou, P.R. China, 510006

autor

Ye S.

• School of Printing and Packaging, Wuhan University, Wuhan, P.R. China, 430072

autor

Yang Q.

• School of Automation, Guangdong University of Technology, Guangzhou, P.R. China, 510006

autor

Zhou Y.

• School of Automation, Guangdong University of Technology, Guangzhou, P.R. China, 510006

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).