Halcon-based optical fiber geometry parameters measurement algorithm

摘要

This paper presents an algorithm to measure geometric parameters of optical fibers based on Halcon. The algorithm enhances the contrast of the fiber image and uses canny edge detection operator to extract the contours of fiber cross section. In order to remove noise in the contour, this paper studies new methods, include setting the contour length range, whether each contour is circular or not and whether the center of the circular contour and the center of the fiber core is consistent or not. These methods remove most of the noise. Finally, the effective contours are merged and then approximated by circle and ellipse. According to the mathematical model, all parameters required can be obtained. Experiment results show that the algorithm accuracy meet the needs.