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.