一种实现森林场景漫游的几何与图像混合绘制方法

Research on Hybrid Rendering for Walking through Forest Scene

采用几何与图像混合绘制技术是实现森林场景建模与实时绘制的主要途径。但目前利用单一模型进行纹理映射的方法使得生成的树木模型在任何方向上观察形状都是相同的,真实感较差。针对这一问题,提出了一个新的解决方案,即利用已知的树木纹理图像,通过3D W arping技术,为新视点实时生成新的纹理图像。这种方法能够让树木在不同的观察方向上展示不同的姿态,从而增加漫游情境的真实感。同时对参考图像的获取方法及新纹理图像的生成算法进行了详细的描述。

Hybrid rendering is a main technology for modeling and rendering of the forest, A valid method of hybrid rendering for forest scene now widely adopted is texture mapping technology which maps tree image to rectangles perpendicular to terrain surface, However, this method can＇t produce a high reality scene for using only one tree image which makes the tree＇s appearance looks the same from any view direction, To resolve this problem, a new method is proposed in this paper： generating the images real-time for the new viewpoints by 3D Warping with the given reference tree images. This method can generate the tree image with different shape for different viewpoint, consequently improve the scene＇s reality, At the same time, the sampling method and the algorithm for generating new image is also described detailedlv.