用于生成DTM的改进的最小二乘匹配(LSM)算法

Improved Algorithm of Lease Squares Matehing(LSM) for Generating DTM Date

本文提供了一种用于生成DTM的LSM算法的数学模型。其特点是,引入了辐射线条件和共面条件的几何约束,以及辐射偏差和几何变形参数的虚拟观测方程。试验表明.改善了LSM算法的收敛性、稳定性和可靠性,因而提高了图像配准的质量。

In this paper, the mathematical model of LSM used for generating DTM data is presented and in which the radial line condition and coplanarity condition are introduced as geometric constraints, the pseudo—observation equations for the radial and geometric defor—mation parameters are added as well to guarantee the stability of numerical solutions. The convergency, stability and retiability of LSM have been improved, thus improving the quality of image matching.