Application of two-dimensional wavelet transform in the modulation measurement profilometry

Jingjing Huang; Wenjing Chen; Xianyu Su

doi:10.1117/1.OE.56.3.034105

11 March 2017 Application of two-dimensional wavelet transform in the modulation measurement profilometry

Jingjing Huang, Wenjing Chen, Xianyu Su

Author Affiliations +

Optical Engineering, Vol. 56, Issue 3, 034105 (March 2017). https://doi.org/10.1117/1.OE.56.3.034105

Abstract

The vertical optical measurement method with coaxial projection and imaging can measure the complex surface or step-like surface because it helps to avoid the shadow and occlusion. Instead of the phase calculation and phase unwrapping processing, only the modulation information is needed to reconstruct the surface of the tested object by this method. To improve the accuracy of the modulation calculation at each scanning position from only one fringe pattern, this paper introduces the two-dimensional (2-D) wavelet transform into modulation measurement profilometry. The relationship between the 2-D complex wavelet transform coefficients and the modulation distribution of the fringe is deduced. The computer simulation and experiment are carried out to verify that the method based on the 2-D complex wavelet analysis offers higher accuracy than that based on the Fourier transform analysis.

Citation Download Citation

Jingjing Huang, Wenjing Chen, and Xianyu Su "Application of two-dimensional wavelet transform in the modulation measurement profilometry," Optical Engineering 56(3), 034105 (11 March 2017). https://doi.org/10.1117/1.OE.56.3.034105

Received: 28 September 2016; Accepted: 3 February 2017; Published: 11 March 2017

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