景区三维虚拟景观系统真实纹理研究

真实纹理是真实风景区三维虚拟景观系统的关键之一，然而在真实风景区三维虚拟景观系统中在使用真实纹理方面还存在纹理数据量大、真实纹理获取和预处理需要大量人力物力、计算机载荷大等问题。本文在简要分析真实纹理获取、预处理、海量数据简化的基础上提出可以通过建设多时相、多分辨率真实纹理库来解决这些问题。首先把获取的风景区的各种真实纹理进行前期制作处理，然后对大尺寸影像进行分割，把大纹理影像变为一系列纹理影像子块，再对每个纹理子块建立多级不同分辨率的纹理子块，建立专门纹理数据库对这些不同分辨率的纹理子块保存，在风景区三维虚拟景观系统建设、运行过程中，通过程序直接从纹理库中调取或舍弃相应的纹理即可顺利完成纹理映射。

Real-texture for Virtual 3D Scenic Spot System

Real-texture is very important for the real-feeling of a virtual 3D scenic spot system,but there are many problems,the texture data are too big,getting and refine them also need much energy,loads of work for the computer. This paper puts forward to constructing a real-texture library of virtual 3D scenic spot system for texture mapping to increase the efficiency mapping and the real-feeling of virtual 3D scenic spot system.This library conclude many multi- size,multi-resolution and multi-time texture blocks for different uses,these texture blocks could be called from the library directly and freely whenever need.