大规模多分辨率纹理数据管理与建模研究

Research on Large-scale Multi-resolution Texture Data Management and Modeling

采用视点相关的地形多分辨率的模型来解决大规模地形纹理可视化问题。将全球影像数据按照墨卡托投影进行分割存储,构建纹理金字塔,通过架设纹理数据库,结合数据库在数据管理方面的优点,实现了快速有效地管理海量的纹理数据。采用四叉树的实时多分辨率纹理模型,动态加载纹理数据,预加载纹理,进一步提高纹理数据的显示速度,很好地制衡纹理绘制速度与画面失真程度间的矛盾。

View-dependent multiresolution terrain model was used to solve the problem of visualization of largescale terrain textures. By dividing and storing the world image data with the Mercator projection, building texture pyramids and texture database because of its advantages of data management, implemented manage vast amounts of texture data quickly and effectively. By quadtree real-time multi-resolution texture model, dynamic loading texture data, the pre textures, further improved the display speed of texture data and sovled the contradiction between rendering texture speed and screen distortion level.