A New Method to Extract Fringe Skeletons from A Single Speckle Fringe Image
一种提取单幅散斑干涉条纹图中心线的可靠方法

In the field of optical deformation measurement,obtaining the fringe phase information from one speckle interferometry high accurately and automatically is a difficult problem.In this paper,a novel method is proposed to extract the skeletons precisely.We estimate the fringe orientation firstly and use a special filter to depress orientation noises.Then with the fringe orientations,the fringe slope angles are computed.In the slope angle map,great jumps of the slope intensity values occurred at fringe peaks and fringe valleys.At last,the fringe skeletons are easily extracted from the slope angle map.This method has been tested by real speckle fringe pattern images,and the results show that this method is efficient and robust for ESPI even with high speckle noise.