计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
9期
171-175
,共5页
Kriging 插值%层次细节模型(LOD)%反向多级细化%地形建模
Kriging 插值%層次細節模型(LOD)%反嚮多級細化%地形建模
Kriging 삽치%층차세절모형(LOD)%반향다급세화%지형건모
Kriging interpolation%Level Of Detail model(LOD)%multi-level backward refinement%terrain modeling
针对层次细节模型(LOD)只能实现数据精度低于原始 DEM 数据的动态地形建模过程,提出了基于 Kriging 方法的动态地形反向细化方法(Levels Of Backward Detail,LOBD).该方法提取出需反向细化区域,判断多级细化级别,分析区域的空间属性相关性,根据最优条件拟合变异函数,根据 Kriging 方法对目标区域进行插值,生成精度高于原始 DEM 数据精度的区域数据.设计了按独立树结构的插值数据动态存储方式.建模实验表明,新的动态建模方法的细节层次可以比 LOD 方法至少增加两级,并且保持渲染效率基本不变.
針對層次細節模型(LOD)隻能實現數據精度低于原始 DEM 數據的動態地形建模過程,提齣瞭基于 Kriging 方法的動態地形反嚮細化方法(Levels Of Backward Detail,LOBD).該方法提取齣需反嚮細化區域,判斷多級細化級彆,分析區域的空間屬性相關性,根據最優條件擬閤變異函數,根據 Kriging 方法對目標區域進行插值,生成精度高于原始 DEM 數據精度的區域數據.設計瞭按獨立樹結構的插值數據動態存儲方式.建模實驗錶明,新的動態建模方法的細節層次可以比 LOD 方法至少增加兩級,併且保持渲染效率基本不變.
침대층차세절모형(LOD)지능실현수거정도저우원시 DEM 수거적동태지형건모과정,제출료기우 Kriging 방법적동태지형반향세화방법(Levels Of Backward Detail,LOBD).해방법제취출수반향세화구역,판단다급세화급별,분석구역적공간속성상관성,근거최우조건의합변이함수,근거 Kriging 방법대목표구역진행삽치,생성정도고우원시 DEM 수거정도적구역수거.설계료안독립수결구적삽치수거동태존저방식.건모실험표명,신적동태건모방법적세절층차가이비 LOD 방법지소증가량급,병차보지선염효솔기본불변.
Aiming at the limitation that the Level Of Detail(LOD)model can only achieve lower data resolution precision than the original Digital Elevation Model(DEM)data within dynamic terrain modeling process, dynamic terrain Levels Of Backward Detail(LOBD)method based on Kriging algorithm is proposed. This method extracts the area to be reversely refined, deter-mines the multi-level refinement rank, analyzes the region spatial properties interdependency, and fits the variance function according to optimal conditions, interpolates data to the target area according to Kriging interpolation algorithm, and then gener-ates higher precision data than the original DEM data. The interpolation data dynamic store method according to the independent tree structure is also designed. Modeling experiments show that this new dynamic modeling method can increase at least two detail levels than LOD method, and the efficiency of rendering is kept.
