变形监测点三维坐标获取系统  

Deformation Monitoring System for Obtaining Three-dimensional Coordinates

作　　者：吴超超[1,2] 赵欣[1] 王涛 

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454003 [2]北京四维远见信息技术有限公司,北京100070

出　　处：《地理空间信息》2009年第6期141-144,共4页Geospatial Information

基　　金：河南省科技攻关资助项目(0524220043)

摘　　要：从摄像机获取的图像信息出发计算三维空间中物体的几何信息,标志点像片上的二维平面坐标的与其三维空间位置是一一对应的。相片立体量测系统的主要目标就是通过像点计算机图像坐标的量测与相机姿态参数来求解相应物方三维坐标,并对误差来源和精度进行分析,最后讨论了监测点变形值的确定方法。详细研究了相机姿态参数确定的方法、目标点的准确定位和像点坐标的求取,根据前方交会得出监测点的物方坐标。通过研究和分析,近景摄影测量在建筑物等小变形体上应用,基本上能达到精度规定要求。The geometric information of the object is calculated by the means of the image obtained by camera. The two-dimensional plane coordinates of the image are one-to-one to the image, three-dimensional location. The main goal of the image, three-dimensional measurement is solving the three coordinates of object by the measurement of the computer, image coordinate and the posture parameters of the camera. The error sources and precision are analysised. At the last the ways of deformation value is discussed. The ways to sovle posture parameters of the camera and the precise location of target points and the, image coordinate to sovle are discussed. The coordinates of object is obtained by forward intersection. Deformation monitoring of samll body building by close-range photogrammetry has been able to achieve the accuracy requirements.

关 键 词：摄影测量 相机标定 像点坐标量测 监测点三维坐标 误差 

分 类 号：P258[天文地球—测绘科学与技术]