基于空间插值的影像纠正精度的空间可视化表达  

Spatial Visualization of Image Rectification Accuracy Based on Spatial Interpolation

作　　者：刘春[1,2] 史文中[2] 朱述龙[3] 

机构地区：[1]同济大学测量与国土信息工程系,上海200092 [2]香港理工大学土地测量与地理资讯学系,地球资讯科技研究中心,中国香港 [3]郑州测绘学院遥感信息工程系,河南郑州450052

出　　处：《遥感学报》2004年第2期143-149,共7页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家自然科学基金项目 (项目号 :40 1710 78);香港特别行政区资助局项目 (项目号 :3 ZB40 );香港理工大学项目 (项目号 :1 3 4 970 9)资助

摘　　要：现有影像纠正精度以控制点精度评定为基础 ,对于精度探讨采用可视化技术从整体上进行表达。以相似变换作为影像纠正的基本模型 ,推导了纠正后任意点精度与控制点精度的关系 ,并基于此选择采用距离倒数乘方法作为空间插值方法 ,插值影像纠正后任意点不同方向上的以及点位的精度。在此基础上 ,采用精度可视化的概念对影像纠正的质量加以描述 ,通过一个加密前后影像纠正的实例说明其应用的方法 。The existing method of accuracy determination for image recertification mainly from the accuracy estimation of the control points. However, adding the technology of spatial visualization to the accuracy determination and giving the whole expression for that is the main idea of this paper. So the conformal transformation model for the image rectification is taken as a beginning to deduce the relation between the accuracy of an arbitrary point and the accuracy of control points. And according to such relation, the Inverse Distance Power method is used to give the spatial interpolation for the image rectification accuracy, which also achieved the interpolation value in x or y directions and of the point moving accuracy. Based on above, the visualizations of accuracy is put forward to give the detail description for the quality of image rectification. A case image is also adopted in this paper to give the explanation for spatial visualizations of accuracy, and also some helpful conclusion is obtained for its availability.

关 键 词：地理信息系统 GIS 空间插值 影像纠正 精度 空间可视化 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]