基于Lobe表示的树木快速3D建模

Texture-Lobes for Tree Modelling

提出了一种基于Lobe表示的树木三维建模方法,该方法的核心思想在于树冠形状取决于外形轮廓,而其内部的枝叶结构具有相似性,可以从有限的模板库通过纹理合成的方法近似生成.该方法可以描述成两大部分:1)编码.将给定树木表示成骨架和Lobe的形式;2)解码.根据Lobe形状,基于已有的枝叶模板生成Lobe内部三维结构.这种基于Lobe的轻量级树木表示方法在很大程度上提高了大规模树木三维模型存储和传输的效率,非常适用于网络环境下大规模城市场景的交互式应用.

We present a lobe-based tree representation for modeling trees. The new representation is based on the observation that the tree＇s foliage details can be abstracted into canonical geometry structures, termed lobe-textures. We introduce techniques to 1） approximate the geometry of given tree data and encode it into a lobe-based representation, 2） decode the representation and synthesize a fully detailed tree model that visually resembles the input. The encoded tree serves as a light intermediate representation, which facilitates efficient storage and transmission of massive amounts of trees, e. g. , from a server to clients for interactive applications in urban environments.