An application of wavelet transform to speckle correlation measurement

Wei Zhao; Yang Liu; Chang Wen Liu; Hong Li Wu; Zheng Liang Li

doi:10.1117/12.676864

23 February 2006 An application of wavelet transform to speckle correlation measurement

Wei Zhao, Yang Liu, Chang Wen Liu, Hong Li Wu, Zheng Liang Li

Proceedings Volume 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 615051 (2006) https://doi.org/10.1117/12.676864
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

Abstract

When applying speckle correlation measurement to the study on the displacement and deformation of objects, a very strict position accuracy of the correlated peak is required, but the correlated peak acquired from speckle frequency-domain correlation is not sharp enough, thus affecting the measurement accuracy directly. In the paper, a wavelet preprocess method for the speckle image is presented. By this means, the speckle edge character is firstly extracted, and the correlation calculation is then performed, and the correlated peak is sharpened. The computer simulated result indicates that the correlated peak can be sharpened and enhanced, and the signal-to-noise ratio is also heightened.

Citation Download Citation

Wei Zhao, Yang Liu, Chang Wen Liu, Hong Li Wu, and Zheng Liang Li "An application of wavelet transform to speckle correlation measurement", Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 615051 (23 February 2006); https://doi.org/10.1117/12.676864

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available