New data processing method for improving the measurement accuracy in FTP

During the 3D shape measurement, there are noises in the images that are obtained by the capture system. The traditional method, Fourier transform profilometry (FTP) technique, improves the accuracy only by the filtering method in the frequency domain. In this paper, the curve fitting method is used...

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Bibliographic Details
Published inOptoelectronics letters Vol. 7; no. 1; pp. 69 - 73
Main Authors Tian, Jing, Sun, Jie, Ning, Han-li, Xu, Zhong-qi, Yang, Ming
Format Journal Article
LanguageEnglish
Published Heidelberg Tianjin University of Technology 01.01.2011
Subjects
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Data Processing Method
Sinusoidal Fringe
Fringe Pattern
Median Filter
Golay Filter
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ISSN1673-1905
1993-5013
DOI10.1007/s11801-011-0068-1

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Summary:During the 3D shape measurement, there are noises in the images that are obtained by the capture system. The traditional method, Fourier transform profilometry (FTP) technique, improves the accuracy only by the filtering method in the frequency domain. In this paper, the curve fitting method is used for the light field distribution calculation before the filtering process applied in the frequency domain by choosing a suitable filter window, and then the higher quality of the basic frequency component signal is got. This method can avoid the frequency overlapping caused by the noise, so the improvement of the measuring accuracy of FTP is realized.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-011-0068-1