摘要： 出于对大范围地形场景实时生成的需要,提出了一种地形数据简化的方法。首先基于“分而治之”思想给出规则数据分割的概念,并给出数据分割算法,然后通过将地形数据的高度值解释为二维图像元素的灰度值,把地形数据变成平面图像,再利用数字图像处理的方法获得地形特征,提出了两种地形分类简化模型,即基于熵的地形类型划分模型和基于DEM数据统计特性的地形类型划分模型,最后比较了不同地形特征的数据简化结果。

关键词: 地形数据, 数据简化, 实时生成

Abstract: In order to satisfy the demand for real time generation of large terrain,firstly,the paper brings forward an idea about regular terrain data segmentation based on “segmentation and process”,and also gives the algorithm of data segmentation,and then,by translate terrain data to image data,it gives two ways to simply terrain data based on terrain feature,one is based on entropy,another is based on statistical character of DEM data.The result of simplification is given.

中图分类号: 

• TP391.41