Abstract
De-noise effects of wavelet analysis technique on Digital speckle correlation method (DSCM) are described in this paper. The principle of wavelet de-noise in digital speckle correlation is shown and the related algorithm structure is given. A series of DSCM experimental results, such as zero displacement, rigid body movement and 3-point-bending deformation, are handled. These results reveal that Wavelet analysis technique has better de- noise effect in the DSCM and the measure precision can reach to 0.01-0.005 pixel. This advanced DSCM provides a precision deformation measurement tool in optical metrology.
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