基于球B样条函数的烟草叶片虚拟实现

Virtual realization of tobacco leaves based on ball B-spline function

植物三维形态的可视化模拟是数字植物研究的基础。该文综合应用球B样条曲线和插值B样条曲面实现了以脉序作为结构骨架的烟草叶片几何建模。首先利用三维数字化仪等数据获取装置获取烟草叶片脉序主要形态特征点的三维坐标和厚度,然后利用球B样条曲线对脉序进行三维建模,生成叶片的形态骨架,与由插值样条生成的叶片曲面合成,实现了烟草叶片的三维重建和真实感显示。结果表明,该方法得到的烟草叶片几何模型与传统方法相比具有较高的真实感,为植物叶片叶脉尺度的高真实感几何建模提供了新的手段。

Reconstruction of three-dimensional plant morphological structure is the basis for digital plant research. In this paper,ball B-spline curve and interpolation of B-spline surface were combined to realize geometric modeling of tobacco leaves with venation skeleton structure. In modeling process,3D scanner and other measurement tools were firstly used to get 3D coordinates and thickness of veins according to principal morphological structure of tobacco leaves. And then veins models were generated with ball B-spline curve to get the morphological skeleton,through synthesis with leaves surface which was described with interpolation of B-spline surface. The final models were completed to realize 3D reconstruction and reality exhibition of tobacco leaves. The results show that the leaves models generated by this method are more realistic,and the method can provide a new technique for explicit modeling of plant leaves.