基于亚像素边缘的椭圆中心检测方法研究  

Detection method of ellipse center based on sub-pixel edge

作　　者：杨险峰[1] 蔡少虬[1] 杨学友[2] 

机构地区：[1]九江学院数控技术与应用省重点实验室,江西九江332005 [2]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《光学仪器》2014年第6期481-485,共5页Optical Instruments

摘　　要：在椭圆边缘粗定位的基础上,根据椭圆粗定位信息及图像边缘梯度方向附近点的灰度分布特征,进行高斯拟合获取精确的亚像素边缘点,对亚像素边缘点进行最小二乘拟合,得到精确的椭圆中心位置。实验证明,该算法对椭圆中心定位精度和稳定性有较大提高,并有很好的实时性。Based on coarse positioning information of the ellipse and gray distribution features of the point near the image edge of gradient direction, Gauss fitting is used to obtain accurate sub-pixel edge points. By using the least-square fitting of the sub-pixel edge, the ellipse＇s center position is obtained. Experimental results proved the efficiency and stability of the algorithm to ellipse center accurate positioning, and has a good real-time performance.

关 键 词：边缘检测 高斯拟合 亚像素 最小二乘 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]