单目视觉测量球形体中心偏移校正方法_周辉峰.pdfVIP

2008 8 August 2008 19 4 Journal of the Academy of Equipment Command Technology ol. 19 No1 4 1 2 1 周辉峰 , 曾国强 , 达兴亚 ( 1. , 101416; 2. , 101416) : 针孔成像模型下非主光轴上的球体成像为椭圆, 椭圆中心偏离球 心 影点针对球体固定单目视觉测距问题, 推导了椭圆中心偏移量的解析公式, 研 究了基于该公式的校正方法, 并进行了仿真验证结果表明, 该方法有效地减小了成 像中心偏移带来的误差, 适用于近距离大视场固定单目视觉测距 : 针孔成像模型; 球形体; 最小二乘拟合; 固定单目视觉 : TP 391 : 1673-0127(2008)04-0063-05 : A DOI: 10.3783/ j. issn. 1673-0127.2008.04.016 Calibration Method About the Image Center Offset of Sphericity Based on Monocular Vision 1 2 1 ZHOU Huifeng , ZENG Guoqiang , DA Xingya ( 1. Company of Postgraduate Management, the Academy of Equipment Command T echnology, Beijing 101416, China; 2. Department of Space Equipment, the Academy of Equipment Command Technology, Beijing 101416, China) Abstract: T he image of sphericity which does not located the principal optic axis is an ellipse based on pinhole model, and the image center offsets from the projection of the sphere center. T o solve the sphere ranging problem of fixed monocular vision, the analytical formulation of ellipse center offset is deduced, and the calibration method using this formulation is proposed. T he results of the simulation show that this calibration method is validated which can efficiently minish the error caused by ellipse center offset, and can be used for high-precision sphericity ranging problem of fixed monoc- ular vision in close range, wide angle situations. Key words: pinhole model; sphericity; least squares fitting; fixed monocular vision ,