基于均匀双三次B样条曲面插值格网DEM加密  

DEM Intensify Based on Evenbicubic B-splinepatch Surface Grid

作　　者：秦翠萍 梁田录 

机构地区：[1]中国建筑土木建设有限公司,北京100070

出　　处：《施工技术》2012年第S2期263-266,共4页Construction Technology

摘　　要：双三次B样条曲面具有控制点特征的高保真性,介绍了根据格网DEM构建均匀双三次B样条曲面的方法,并实现了曲面的多分辨率插值,完成了格网DEM的加密。同时根据试验数据的特点设计了加密后DEM的精度评定方法——插值残差统计分析法,全面评价了加密DEM的精度,评价结果显示该方法是有效的。The bicubic B-splinepatch surface's controlling points have the characterize of high fidelity.The method of establishing evenbicubic B-splinepatch surface is introduced according to the grid DEM,and multire solution interpolation of the patch surface torealize grid DEM intensification is achieved.Meanwhile the intensified DEM precision evaluation approach has been defined based on the features of experimental data-interpolation residual statisticsanalysis to assess the intensify DEM precision globally.And the assessment result proves the effectiveness of this approach.

关 键 词：DEM 均匀双三次B样条曲面 插值 精度分析 

分 类 号：TU198.1[建筑科学—建筑理论]