Phase retrieval of speckle fringe pattern with carriers using 2D wavelet transform |
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| Authors: | H. Niu C. Quan C.J. Tay |
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| Affiliation: | aDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore |
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| Abstract: | A novel two-dimensional (2D) Gabor continuous wavelet transform (CWT) for phase retrieval and fringe filtering of speckle fringe patterns with spatial carriers is proposed. Theoretical analysis of 2D Gabor CWT is presented and results are compared with advanced fan 2D CWT using both the computer simulated and experimental speckle fringe patterns. It is shown that noise reduction by 2D Gabor CWT demonstrates better results than that of the advanced fan 2D CWT. Two-dimensional Gabor CWT is also compared with 2D Fourier transform and results show that 2D Gabor CWT algorithm has better noise immunity. |
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| Keywords: | 2D Wavelet transform Phase retrieval Fringe filtering Speckle fringe pattern |
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