Prodotti della ricerca

 
Titolo: A posteriori compensation of the systematic error due to polynomial interpolation in digital image correlation
Autori: 
Data di pubblicazione: 2013
Rivista: 
OPTICAL ENGINEERING  
Abstract: It is well known that displacement components estimated using digital image correlation are affected by a systematic error due to the poly- nomial interpolation required by the numerical algorithm. The magnitude of bias depends on the characteristics of the speckle pattern (i.e., the fre- quency content of the image), on the fractional part of displacements and on the type of polynomial used for intensity interpolation. In literature, B-Spline polynomials are pointed out as being able to introduce the smaller errors, whereas bilinear and cubic interpolants generally give the worst results. However, the small bias of B-Spline polynomials is par- tially counterbalanced by a somewhat larger execution time. We will try to improve the accuracy of lower order polynomials by a posteriori correcting their results so as to obtain a faster and more accurate analysis.
Handle: http://hdl.handle.net/11584/96286
Tipologia:1.1 Articolo in rivista

File in questo prodotto:
Non ci sono file associati a questo prodotto.
credits unica.it | accessibilità Università degli Studi di Cagliari
C.F.: 80019600925 - P.I.: 00443370929
note legali | privacy

Nascondi la toolbar