Chinese Optics Letters, 2010, 8 (7): 666, Published Online: Jul. 19, 2010
Measuring method for micro-diameter based on structured-light vision technology Download: 813次
线结构光视觉 直径测量 光条图像处理 圆拟合 150.1135 Algorithms 150.0155 Machine vision optics 150.6910 Three-dimensional sensing
Abstract
Based on structured-light vision measurement technology, we study a measuring method for microdiameter. The measurement principle and mathematical model are described. A novel grayscale barycenter extraction algorithm along the radial direction is proposed, which can precisely gather the image coordinates of the ellipse-shaped light-stripe centers. The accuracy of the measurement result shows marked improvement by using the algorithm. The method executes circle fitting to the measured three-dimensional (3D) data using linear least square method, which can acquire the diameter, surface profile, and other information of the object effectively. On the scene, a line-structured light vision system using the presented method is applied to measure the curvature radius of metal blades. Experimental results show that the measurement precision of the system is higher than 2 \mu m.
Bin Liu, Peng Wang, Yong Zeng, Changku Sun. Measuring method for micro-diameter based on structured-light vision technology[J]. Chinese Optics Letters, 2010, 8(7): 666.