感知二步插值标定方法研究  

Research on two-step susceptible and interpolated calibration algorithm

作　　者：史明强[1] 张海翔[1] 鲁正[1] 胡恢军[1] 喻擎苍[1] 

机构地区：[1]浙江理工大学信息电子学院,浙江杭州310018

出　　处：《机电工程》2011年第8期960-964,982,共6页Journal of Mechanical & Electrical Engineering

摘　　要：为提高标定效率及标定精度,提出了感知二步插值标定方法。该方法抛弃通过人工测量来调整实验平台与标定面之间位置关系的方法,让计算机具备感知CCD光轴与标定平面法线间偏差的能力来弥补人工测量的不足。在标定过程中,通过提取图像角点的亚像素坐标,直接建立了成像面上角点与世界坐标之间的对应关系,最后根据已知角点插值得到了平面上任一点的世界坐标,并进行了实际平面符号图的检测试验。试验结果表明:该方法提高了标定速度及标定精度,为三维重建奠定了基础。Aiming at improving the calibrated efficiency and precision,a two-step susceptible calibration algorithm based on the interpolation technique was introduced.In this two-step method,the traditional method which adjusts the position relationship between experimental platform and calibration plane by manual measurements was abandoned,the computer was made to be able to ＂perceive＂ the deviation existed between the CCD axis and the normal of calibration the plane,so as to the shortages of artificial measurements were made up.At first,by the sub-pixel coordinations of the extracted corner points,the corresponding relationship between the corner points of imaging plane and the world coordinate was directly established during the calibration.Then the world coordinates of any points in the plane were obtained according to the interpolation of the known corner points.At the same time a experiment was done to test the actual plane symbol graph.The results prove that this method improves the calibrated efficiency and precision,and lay the foundation for 3D reconstruction.

关 键 词：结构光 插值 亚像素 系统标定 三维坐标 

分 类 号：TP242.6[自动化与计算机技术—检测技术与自动化装置]