Absolute phase recovery of three fringe patterns with selected spatial frequencies |
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| Institution: | 1. State Key Laboratory of Precision Electronic Manufacturing Equipment and Technology, Guangdong University of Technology, Guangzhou 510006, China;2. Key Laboratory of Intelligent Inspection and Manufacturing IoT of Ministry of Education, Guangdong University of Technology, Guangzhou 510006, China;1. EPSRC Center, University of Huddersfield, HD1 3DH, UK;2. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China;1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China;2. Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, Stuttgart 70569, Germany;1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China;2. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China |
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| Abstract: | A new temporal approach is presented for the recovery of the absolute phase maps from their wrapped versions based on the use of fringe patterns of three different spatial frequencies. In contrast to the two-frequency method recently published, the method proposed is characterized by better anti-error capability as measured by phase error tolerance bound. A general rule for the selection of the three frequencies is presented, and its relationship to the phase error tolerance bound is derived. Theoretical analysis and experimental results are also presented to validate the effectiveness of the proposed three frequency technique. |
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| Keywords: | Fringe analysis Phase shift Three-dimensional sensing Phase unwrapping Surface measurements |
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