建立天空场景的模拟算法

建立真实感的天空场景,在环境仿真和气象现象模拟中,有着极其重要的应用价值,也是计算机可视化研究中的难题。首先通过确定色彩层次模型,改进基于中点的变位方法生成基本云图,然后使用基于图像的方法进行云图映射,最后融合气象信息要素等过程生成天空背景,并采用光照叠加、背景合成及色彩调整等方法,产生千姿百态、形象逼真的天空场景图。可在多种气象现象的模拟仿真,纹理贴图的产生以及气象信息可视化系统的开发等方面发挥重要的作用。

Simulation Algorithm for Creating Sky Scene

Creating the realistical sky scene has very important application value in simulation environment and weather phenomenon.It is also a difficult task within computer visualization study.An algorithm that can generate colorful and realistic sky scenes is described.The algorithm includes the following procedures: to create the basic cloud picture by determining the color hierarchy mode and improving the mid-pointed position shifting method;to conduct cloud picture mapping based on images;to create the sky scene in combination with meteorological elements through optical superposition,background synthesis,and color modification,etc.It can play an important role in various kinds of meteorological phenomenon simulation and the development of weather information visual system.