关键词: 干涉条纹, 条纹分析, 图像分割, 图像细化

Abstract: The accurate center location of fringe pattern is vital to measurement accuracy of interferometric method.For complex background fringe pattern，the location of fringe center is seriously affected by noise.The key noises are laser speckle and non-homogeneous background intensity，to suppress these noises pre-processing of Butterworth Low-pass filter and background compensation is utilized，then binary fringe is obtained based on area segmentation.Thinning the binary fringe and take it as the rough center of fringe，gray scale sampling around the rough center is fitted by polynomial，and the center of fringe is calculated by extremum method.At last，center location of a simulated fringe pattern is calculated by this method，the result shows that the location obtained by this method is more accurate than that obtained by directly thinning the fringe.

Key words: fringe pattern, fringe analysis, image segmentation, image thinning