METHOD FOR SMOOTHING SPECKLE INTERFEROMETRY FRINGE-PATTERNS IN BIG CURVE WINDOW
用曲线大窗口平滑散斑条纹图的方法研究

In the field of optical deformation measurement, it is a hotspot how to remove thespeckle noise from one speckle inerferometry fringe pattern, and observe the full field fringe phaseinformation high-accurately and automatically. In this paper, a simple method of estimating fringeorientation is presented. A curve window along the fringe curve is determined according a mapof fringe orientation, and the filter in a big curve window is applied to speckle interferometryfringe patterns. These methods are tested by real speckle fringe pattern and the results show thatthe speckle noise is removed efficiently with preserving the structural integrity of fringe. Thesemethods provide a basis for observing fringe phase from one speckle fringe pattern using fringeskeleton method or pure fringe gray level method.