散斑条纹自适应寻线滤波

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关键词：数字散斑干涉；滤波评价；自动滤波；自适应寻线

中图分类号：TP391.4 文献标识码：A

doi：10.37188/OPE.20253315.2402 CSTR：32169.14.OPE.20253315.2402

Speckle fringes adaptive path-seeking filtering method

ZHAO Qihan 1，2 ，LUO Kaiqi1，PU Jiaqi¹，YAO Yanfeng²，WANG Yonghong²

（1. School of Intelligent Manufacturing， Taizhou University， Taizhou 318ooo，China; 2. School of Instrument Science and Opto-electronics Engineering， Hefei University of Technology ， Hefei230009，China） * Corresponding author，E-mail： yhwang@hfut. edu. cn

Abstract： Digital speckle pattern interferometry（DSPI） is a real-time，whole-field，and non-contact optical measurement method that has been widely applied in the field of non-destructive testing.However，the original phase maps obtained from DSPI measurements are often corrpted by speckle noise，which can compromise the accuracy and reliability of the subsequent phase unwrapping process. Therefore，there is a pressing need for an adaptive filtering method that can improve filtering performance and enhance the applicability of DSPI in complex application scenarios.In this paper，we propose an adaptive path-seeking filtering method for speckle fringes. The method first employs YOLOv8 to automatically identify and locate speckle fringe regions，reducing the calculation of invalid areas. Then，combined with the peak feature analysis，the optimal sampling path is dynamically planned to enhance the characterization of complex fringe structures. Finally，a local variance entropy（LVE）evaluation model is established based on Bspline fitting，enabling quantitative assessment of filtering smoothness while effectively preserving critical phase jump information. Experimental results show that the proposed method exhibits excellent filtering performance and automation capabilities across Various scenarios，providing reliable support for the engineering applications of DSPI.

Key words： digital speckle pattern interferometry； filtering evaluation； automatic filtering judgment; adaptive path-seeking

1引言

数字散斑干涉技术是一种实时、全场、非接触的光学测量方法，广泛应用于汽车和航空航天领域中变形或缺陷的测量[1-4]。（剩余11197字）