James Leger, Editor-in-Chief
Fang Zhang, Danyu Wang, Zhitao Xiao, Lei Geng, Jun Wu, Zhenbei Xu, Jiao Sun, Jinjiang Wang, and Jiangtao Xi
and Jiangtao Xi4
1School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
2Key laboratory of Opto-electronic Information Technology, Ministry of Education (Tianjin University), Tianjin, 300072, China
3School of Precision Instrument and Opto-electronics Engineering of Tianjin University, Tianjin, 300072, China
4School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
*Corresponding author: email@example.com
A novel phase extraction method for single electronic speckle pattern interferometry (ESPI) fringes is proposed. The partial differential equations (PDEs) are used to extract the skeletons of the gray-scale fringe and to interpolate the whole-field phase values based on skeleton map. Firstly, the gradient vector field (GVF) of the initial fringe is adjusted by an anisotropic PDE. Secondly, the skeletons of the fringe are extracted combining the divergence property of the adjusted GVF. After assigning skeleton orders, the whole-field phase information is interpolated by the heat conduction equation. The validity of the proposed method is verified by computer-simulated and experimentally obtained poor-quality ESPI fringe patterns.
© 2015 Optical Society of America
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