Acta Optica Sinica, Volume. 30, Issue 8, 2242(2010)
Two-Dimensional Gabor Wavelet Transform Profilometry Using Two-Dimensional Grid Fringe Pattern
In order to overcome the discontinuous phase unwrapping in three-dimensional (3D) shape measurements of discontinuous objects and improve measurement precision,a two-dimensional Gabor wavelet transform profilometry(2D-WTP) using a grid fringe pattern is presented.Compared with the profilometry using one-dimensional single frequency fringe pattern,double measurement informations can be obtained from the method and they can reach the same precision.It is unnecessary to utilize bandpass filters in the method for extracting two modulation phases from the grid fringe pattern.Through detecting the ridge,two wrapped phases along the x- and y- axis directions are directly extracted using 2D Gabor wavelet transform from the deformed grid fringe pattern respectively,and the corresponding unwrapped phases are obtained by use of a lookup table method.The detailed theoretical analysis is given and the experimental results show that the above method is valid.
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Yang Chuping, Weng Jiawen, Lin Fang. Two-Dimensional Gabor Wavelet Transform Profilometry Using Two-Dimensional Grid Fringe Pattern[J]. Acta Optica Sinica, 2010, 30(8): 2242
Category: Instrumentation, Measurement and Metrology
Received: Aug. 17, 2009
Accepted: --
Published Online: Aug. 13, 2010
The Author Email: Chuping Yang (yangchp@scau.edu.cn)