Coarse-to-Fine Strategy for Ellipse Center Location

摘要：

　　In the practical application of machine vision,highly precise ellipse center location is the key to measurement accuracy of the system.In this paper,we propose a robust and efficient method of ellipse center location in various noise effects.The proposed method exploits a coarse-to-fine strategy,the tangents near a contour vote in a Hough voting space,followed by mean shift method for the candidate ellipse center,and the pixel-level ellipse center is gotten by Hessian determinant.Finally interpolation method is used to obtain subpixel center coordinates for ellipse feature.Experimental results reveal our approach has a good location performance and the location error is less than 0.12 pixels.

关键词： ellipse extraction sub-pixel ellipse center hough voting dual quadratic curve

作者: Fu-Qiang Zhou Rong Zou He Gao

作者单位: School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China

会议类型: 国际会议

会议名称: 第16届机电一体化技术国际会议

会议地点: 天津

会议语种:英文

页码: 597-602

在线出版日期: 2012-10-16（万方平台首次上网日期，不代表论文的发表时间）