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 ,但从三维重构精度角度考虑相机的空间位置有重大影响 The DLT algorithm is a widely used basic algorithm for three-dimensional reconstruction using plane images. In this paper, the coordinate errors that can not be avoided in planar image processing are discussed. The effects of coordinate errors on the three-dimensional reconstruction coordinates are discussed. The sensitivity of the three-dimensional reconstruction coordinates to the coordinate errors of each image is analyzed and the numerical simulation experiments are carried out. The results show that the coordinate errors of each sub-coordinate object in 3D reconstruction have different sensitivities and are closely related to the spatial position of the camera. This shows that DLT algorithm in theory, although the space allocation of the camera has no special requirements, but from the perspective of three-dimensional reconstruction accuracy of the camera space position has a significant impact