一种改进的相对定向标定方法研究

研究了三维重建技术中外方位元素的相对定向标定方法。经典的相对定向标定方法仅适用于两张像片焦距固定的情况。在经典方法的基础上，通过增加参数个数、建立新的解算方程和误差方程，并采用最小二乘法原理求解的方法，建立了一种适用于可变焦距情况下的改进的相对定向标定方法。最后通过实验和误差分析后，验证了在接近零噪声的情况下，改进的相对定向方法能适应一般场景的重建，重建误差较低。因此，该方法可以有效解决仅知其中一张像片焦距，即焦距可变的情况。

An Improved Relative Orientation Calibration Method Research

This paper study the relative orientation calibration method of exterior orientation elements computer 3d reconstruction technology. The classic relative orientation calibration method is only fit for two pictures with the fixed focal length. Based on the classical relative orientation algorithm, we construct an improved method by increasing parameters, builing calculating equation and error equation. The experiment results and error analysis show the improved method has good validity and feasibility. When close to zero noise the improved relative orientation method can well adapt to the reconstruction scene and the reconstruction error is low.Therefore, the improved method can effectively solve the vari-focal case that we can only know one of the pictures.