大场景地形三维逼真显示的一种方法

A method to display 3D terrain realistically

介绍了一种如何根据DEM三维位置进行三维逼真显示的实现方法,根据三维变换原理将三维位置转换成平面二维坐标,参考Phong光照模型,考虑了地形高度而计算光照强度,对显示中遇到的侧面显示和消隐问题进行了阐述,通过干涉SAR生成的DEM进行了大场景三维逼真显示,说明了方法的可行性。

A method to display 3D terrain realistically based on DEM is proposed in this paper. 3D position of DEM is first converted into 2D position based on 3D transform principle and then the illumination intensity is calculated according to Phong model considering the terrain elevation. The side display and shadow elimination that influence 3D display are also presented in detail, and a big scene of DEM generated by InSAR is displayed realistically using this method. The good display result demonstrates the method is feasible.