Analysis of reliability of subpixel displacement estimations used in digital speckle correlation method (DSCM)

Abstract

This paper discusses the precise estimation of interpolation and gradient algorithm which search subpixel displacement by digital speckle correlation method. We obtain these results which the displacement estimations of subpixel are affected by speckle design, interpolation formula, estimated function etc. The theory precision of the quadratic interpolation… (More)

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