Frequency guided methods for demodulation of a single fringe pattern with quadratic phase matching |
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Authors: | Haixia WangKai Li Qian Kemao |
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Affiliation: | a School of Computer Engineering, Nanyang Technological University, Singapore 639798, Singapore b Department of Mechanics, Shanghai University, Shanghai 200444, China |
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Abstract: | Phase demodulation from a single fringe pattern is a challenging task but of interest. A quadratic phase matching and frequency-guided regularized phase tracker (QFGRPT) and a quadratic phase matching and frequency-guided sequential demodulation (QFSD) for demodulation of a single fringe pattern are proposed. The algorithms are characterized by their improvements on both robustness and accuracy, which are realized by quadratic phase matching and frequency guided scanning strategy, respectively. Quadratic phase matching improves accuracy compared with the existing regularized phase tracker techniques and the frequency-guided sequential demodulation technique using linear phase matching. Frequency guidance ensures high robustness compared with the recently published path-independent regularized phase-tracking technique. Demodulation results from computer-simulated and experimental fringe patterns using the proposed methods are demonstrated and analyzed. |
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Keywords: | Regularized phase tracker Frequency guided sequential demodulation Quadratic phase matching |
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