玉米三维重构及可视化系统的设计与实现

Design and implementation of three-dimensional geometric morphological modeling and visualization system for maize

重构出植物的三维形态是数字植物研究的基础。介绍了玉米三维重构及可视化系统的整体结构、数学基础及实现过程。系统由器官几何造型模块、生长模型模块、可视化控制模块、数据库和人机交互界面组成。其中,玉米叶片、茎节、雄穗、雌穗和根系的三维形态是由基于器官形态结构主要特征而构建的参数化的几何模型来描述的。模型参数具有较明确的生物学意义,均可由品种特征或生长模型生成;系统运行时,根据玉米品种特征和玉米生长模型生成植株的拓扑结构参数和器官几何模型参数,通过人机交互操作来确定行株距等农艺措施参数,进而结合VC++和openGL在计算机上重构出玉米器官、个体和群体的三维形态,具有较好地真实感。系统界面友好、使用方便,易于交互,为农学研究者提供了新的手段。

Reconstruction of three-dimensional plant morphological structure is the basis for digital plant research. In this paper, the system structure, mathematics foundation and realization process of three-dimensional geometric morphological modeling and visualization system for maize plant were introduced. Thesystem was composed of organ geometric construction module, growth modeling module, visualization control module, database, and human-machine interface. Three-dimensional morphological structures of leaf, stem, tassel, ear, and root system were described by parameterized geometrical models based on organ morphological structural characteristics. The model parameters had definite biological background and were produced based on cultivar characteristics or growth models. During run of the system, topological structural parameters and organ geometrical model parameters were produced based on cultivar characteristics and maize growth models, and agronomical management parameters such as plant and row distance were determined through interaction of human-machine. Three-dimensional morphological structure of maize organ, plant and plant population were built on computer with VC＋ ＋ and openGL. With friendly system interface, convenient operation, and easy communication, the system provided a new tool for agronomists.