一种多分辨率混合相机系统标定方法  

A Calibration Technology for Multi-resolution Hybrid Camera System

作　　者：徐树奎[1] 张军[1] 涂丹[1] 李国辉[1,2] 

机构地区：[1]国防科技大学信息系统与管理学院,长沙410073 [2]国防科技大学信息系统工程重点实验室,长沙410073

出　　处：《小型微型计算机系统》2012年第9期2073-2078,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61170159)资助

摘　　要：针对高速低分辨率相机和高分辨率相机构成的混合相机系统,提出基于空间约束的多分辨率相机标定方法.采用空间距离尺度作为统一各坐标系之间的度量单位,建立单相机内外参数模型和多相机相对外部参数模型.采用先单相机标定内部参数后多相机联合标定相对外部参数的方法完成混合相机的标定.首先使用2步法对每个相机进行内、外部参数标定,然后将这些参数作为初始值求解多相机标定模型.利用多个相机之间的空间约束,设计了相对外部参数的6步求解算法.实验表明该方法具有较高的稳定性和标定精度.A multi-camera calibration technology based on space restraint is proposed to calibrate a multi-resolution hybrid camera sys- tem which is composed by high-speed low-resolution cameras and high-resolution camera. Space distance scale is adapted to unify the coordinate system of each camera. We present an intrinsic and external parameter model of single camera and a relative external pa- rameter model of hybrid camera system which uses space distance scale to unify the coordinate system of each camera. Intrinsic and external parameters of each camera are calibrated using 2-step method separately. Then as the initial parameters, these parameters are used for solving the multi-camera calibration model. We present a 6-step algorithm based on space restraint to solve the external pa- rameters of multi-camera. The experiments show the method has good stability and precision.

关 键 词：多分辨率 混合相机 相机标定 空间约束 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]