Anisotropic coupled diffusion filter and binarization for the electronic speckle pattern interferometry fringes

Authors

Fang Zhang, Tianjin University of Technology
Zhitao Xiao, Tianjin University of Technology
Jun Wu, Tianjin University of TechnologyFollow
Lei Geng, Tianjin University, Tianjin, China
Hongqiang Li, Tianjin University of Technology
Jiangtao Xi, University of WollongongFollow
Jin Jiang Wang, Tianjin University of Technology

RIS ID

67594

Publication Details

Zhang, F., Xiao, Z., Wu, J., Geng, L., Li, H., Xi, J. & Wang, J. (2012). Anisotropic coupled diffusion filter and binarization for the electronic speckle pattern interferometry fringes. Optics Express, 20 (20), 21905-21916.

Abstract

In this paper novel approaches based on anisotropic coupled diffusion equations are presented to do filter and binarization for ESPI fringes. An advantageous characteristic associated with the proposed technique is that diffusion takes place mainly along the direction of the edge. Therefore, the proposed anisotropic coupled diffusion filter method can avoid blur of the fringe edge and protect the useful information of the fringe patterns. The anisotropic coupled diffusion binarization, which can repair the image boundary anisotropically, is able to avoid the redundant burr. More important, it can be directly applied to the noisy ESPI fringe patterns without much preprocessing, which is a significant advance in fringe analysis for ESPI. The effective of the proposed methods are tested by means of the computer-simulated and experimentally obtained fringe patterns, respectively.