DLT算法中象平面误差对三维重构的影响  

THE INFLUENCES OF IMAGE COORDINATE ERRORS ON THE ACCURACY OF 3-D COORDINATE RECONSTRUCTION IN DLT ALGORITHM

作　　者：杨年峰[1] 王季军[1] 黄昌华[1] 王人成[1] 金德闻[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《中国生物医学工程学报》2000年第2期121-130,共10页Chinese Journal of Biomedical Engineering

基　　金：国家自然科学基金资助!(项目号:39470192);科技部重点攻关项目!(项目号 :969202014)

摘　　要：DLT算法是利用平面图象进行三维重构的广泛采用的基本算法。本文针对平面图象处理中难以避免的象坐标误差 ,讨论了各坐标误差对三维重构坐标的影响 ,由此分析了三维重构坐标对各象坐标误差的敏感程度 ,并进行了数值模拟实验。结果表明三维重构的各分坐标对象坐标误差具有不同的敏感度 ,而且与相机的空间位置有密切的联系。这说明DLT算法中虽然在理论上对相机的空间配置无特别要求 。The DLT (Direct Linear Transformation) algorithm is widely used in 3D reconstruction of planar images. In this paper, the influence of each planar image coordinate error on the accuracy of 3D coordinate reconstruction is analyzed and discussed through analysis of the sensitivity of 3D reconstruction coordinate to image coordinate error. The results of numerical simulation show that each 3D reconstructed coordinate has different sensitivity to the planar image coordinate error. The sensitivity has direct relation to the space configuration of cameras. This conclusion suggests that the space configuration of cameras have a great influence on the accuracy of 3D reconstruction even though the DLT algorithm theoretically has no special requirements of cameras space configuration.

关 键 词：DLT算法 人体运动 三维重构 图象处理 平面误差 

分 类 号：G804.66[文化科学—运动人体科学]