真实感森林场景的可视化研究与实现

Visualization Research and Realization of Realistic Forest Scene

虚拟森林场景的三维可视化是林业信息化的一项关键技术。由于大规模森林场景的计算量较大,多数研究方法或软件倾向采用简化的树木模型,用户体验不够友好,真实感较差。采用生物特征约束下的层次化参数建模方法,能很好地保证单木模型数据的真实性和建模速度。基于不同细节层次的单木模型建立了模型库,为森林的绘制和渲染提供便利,在强大的Speed Tree SDK的支持下,能够达到渲染的速度与精度的有效平衡。

The 3D visualization of virtual forest scene is a key technology for forestry informationization. Due to the large amount of calculation of large-scale forest scene, most research methods or software tend to adopt simplified tree models, which make user＇ s experience not friendly and sense of reality poor. In this paper, a hierarchical parameter modeling method under the restriction of biometric is preferred, which can guarantee the authenticity of the data and the speed of modeling process. Model library based on a serial of tree models of different level of detail is established, which can provide convenience for rendering forest. With the support of powerful SpeedTree SDK, the speed and accuracy of rendering will get effectively balance