单张大角度影像后方交会初值确定方法  

Pose initial value determining method for single large-angle image

作　　者：徐振亮[1,2] 李艳焕[3] 闫利[2] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]武汉大学测绘学院,湖北武汉430079 [3]辽宁工程技术大学审计处,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2014年第7期951-954,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(41271456)

摘　　要：为建立一种确定单张大角度影像位姿初值的计算机视觉方法,将共线方程描述为矩阵形式,在齐次坐标系下将像方坐标与物方坐标分别做归一化处理;通过加权直接线性变换方法估计得到物像间的投影矩阵,将其奇异值分解得到旋转矩阵和平移向量,经转化得到摄影测量中的外方位元素.研究结果表明:该方法确定的位姿初值模型形式简洁,容易收敛,精度能够满足影像量测对位姿初值的需要.In order to establish a method for determining a single large-angle pos initial computer vision methods, firstly, The con-line equation is described as a matrix form, and the image coordinates are normalized with the object coordinates in homogeneous coordinate system. The projection matrix is estimated and obtained by the weighted direct linear transformation. Finally through its singular value decomposition, the rotation matrix and translation vector are obtained, and by transformation, the photogrammetry exterior orientation elements are obtained. The study of results show that the pose initial model determined with this method is simple in the formation and easy convergence, and its accuracy can meet the initial needs for posture.

关 键 词：近景影像 齐次坐标 直接线性变换 奇异值分解 后方交会 位姿估计 

分 类 号：P234.1[天文地球—摄影测量与遥感]