摘要
本文介绍了在选好地面控制点后,按最优原则自动构成三角形网。建立三角单元的仿射变换,求出仿射变换系数。为了避免计算仿射系数可能失败,对边框及三角形的长边进行了适当分割。几何校正时,采用了行列式的判断条件及漂浮法的判断技巧,防止了判断失误,提高了运算速度。文中还提出几何校正边界的一种处理方法。
According to selected ground control points,an optimal trian-gular net is automatically constructed.Then,a system of coefficients thattransforms triangular elements are calculated.For avoiding the possiblefailure of this calculation,some long edges of the triangles are repartitioned.Determiuant decision condition and dynamic Searching Sequence are used,sothat the geometry distortion correction is speeded up and arithmatical over-flow is avoided.In addition,a treatment for the boundary is prsented.
出处
《中国空间科学技术》
EI
CSCD
北大核心
1989年第2期24-31,共8页
Chinese Space Science and Technology
关键词
遥感图象
图象处理
校正
有限元法
Image distortion,Finite element method,Correction,Method.
