适用于动态对焦的高精度灵活标定方法  

Flexible Calibration Method with High Accuracy for Dynamic Focusing

作　　者：周佳立[1] 贾禄帅 武敏[2] 

机构地区：[1]浙江工业大学理学院,杭州310023 [2]浙江科技学院理学院,杭州310023

出　　处：《模式识别与人工智能》2016年第6期481-491,共11页Pattern Recognition and Artificial Intelligence

基　　金：浙江省自然科学基金项目(No.LQ13F020005);浙江省重大科技专项项目(No.2013C01077);浙江省科技厅面上项目(No.2015F50021);科技型中小企业技术创新基金项目(No.13C26213302261);丽水市高层次人才培养项目(No.2013RC08)资助~~

摘　　要：处于动态对焦过程及不同对焦状态下的相机内参会不断变化.文中通过在镜头对焦环上加装角度传感器的方式,提出基于动态对焦过程以主距增量为参数的相机模型,实现任意对焦状态和距离下相机内参数的求解.利用定制的三平面立体标定靶,设计一种高鲁棒性的标定方法.与传统模型相比,该模型基本未增加额外约束条件,可操作性较强.实验表明,文中模型及相应标定方法具有更强的图像校正能力,从而提高摄影测量精度.The camera intrinsic parameters keep changing during the dynamic focusing process and different focusing states. By linking an angle sensor on the focusing ring, a camera model using the increment of the principal distance as the parameter is proposed based on the dynamic focusing process. The camera intrinsic parameters under arbitrary focusing state and object distance can be solved. A highly robust method is put forward by the customized stereo calibration target with three planes. Compared with the traditional model, no additional constraint condition is required and the proposed model has a strong operability. Experiments show the stronger image rectification ability of the proposed model and the corresponding calibration method. Furthermore, the precision of photogrammetry is improved by the proposed method.

关 键 词：相机标定 动态对焦 畸变模型 立体视觉 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]