基于包围盒的靶标圆像点定位算法  

Center locating of circular target based on bounding box

作　　者：陈凯[1] 崔楠[1] 柳有权[1] 

机构地区：[1]长安大学信息工程学院,西安710064

出　　处：《信息技术》2014年第5期57-60,共4页Information Technology

基　　金：中央高校基本科研业务费专项资金(2013G1241112;2013G3242008)

摘　　要：圆形的特征易于提取,摄像机标定通常会选择圆形做为靶标。要准确找到靶标圆圆心像点的位置对标定是至关重要的。传统的做法是对圆形的像椭圆进行拟合,用椭圆的形心代替像点,这种做法不可避免地引入了模型误差。文中提出了一种基于包围盒的计算模型,理论上消除了这种模型误差。最后,通过实验验证,此计算模型有较高的精度。As features of circles are easy to be extracted,we usually choose circles as targets in camera calibration. So it is critical to accurately find the center location of the circular target in image plane in camera calibration. The traditional approach is to fit the ellipse,then use the centroid of the ellipse instead. This method inevitably introduces the model error. This paper presents a computational model based on bounding box,theoretically eliminating the model error. Finally,the experimental results show that this model has higher accuracy.

关 键 词：摄像机标定 靶标圆 包围盒 拟合 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]