Anti aliasing technique in small object surface measurement

Sheng Wei; Nansheng Liu; Xiaorui Liu; Yiqing Wei; Xiaopu Ai; Xian Hu

doi:10.1117/12.838349

23 November 2009 Anti aliasing technique in small object surface measurement

Sheng Wei, Nansheng Liu, Xiaorui Liu, Yiqing Wei, Xiaopu Ai, Xian Hu

Proceedings Volume 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications; 75081K (2009) https://doi.org/10.1117/12.838349
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

The π phase-shifting technique have used early to remedy frequency aliasing in Fourier transform profilometry , two deforming stripe of phase difference π is photographed and then subtracted to remove the influence of zero frequency and high frequency. Due to background of measured object represent zero frequency of deforming stripe in frequency-domain, image processing based wavelet transform is described to separate background image through image wavelet decomposition, then original image and background image is subtracted to remove the influence of zero frequency, and so fundamental frequency extracted easily. The proposed method reserve merit of frequency domain phase demodulation with low equipment cost and fast convenience. The proposed method is tested through three-dimensional surface sensing experiment of arc welding pool.

Citation Download Citation

Sheng Wei, Nansheng Liu, Xiaorui Liu, Yiqing Wei, Xiaopu Ai, and Xian Hu "Anti aliasing technique in small object surface measurement", Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 75081K (23 November 2009); https://doi.org/10.1117/12.838349

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fringe analysis

Wavelets

Wavelet transforms

Optical filters

Fourier transforms

3D image processing

Phase shifts

Show All Keywords

Keywords/Phrases

Search In:

Publication Years