三维地形中多分辨率影像模型建模方法

Construction and Realization of Multi-Resolution Texture Odel in 3D Terrain Visualization

使用高分辨率纹理是增强地形真实性最常用的有效方法,但由于其数据量的庞大需要对纹理影像进行分块处理。为了解决常规手工纹理分块的不足,给出了影像纹理的自动分块原则和方法,提出了一种基于视点的动态多分辨纹理模型和确定纹理分辨率的算法,设计了管理纹理数据的数据结构和数据库存储方案。试验表明,该方法在不降低显示质量的同时,能有效减少纹理的渲染量和较好的可视化效果。

High resolution texture is the most commonly used method to strengthen terrain authenticity. The huge higher data of solution texture have surpassed the limits of the computer graph render equipment. Therefore, it needs the piecemeal texture. In order to address the insufficiency of the conventional manual texture piecemeal, this paper has produced the image texture automatic piecemeal principle and method, and proposed a dynamic multi-resolutions texture model. It gets texture resolution method based on the viewpoint, and designs the data construction to management texture and the database memory program. The experiment proves that this method does not only reduce the demonstration quality, but is also able to effectively reduce the texture quantity and obtain a better visible effect.