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[目的]研究幼苗期油菜的几何造型。[方法]通过对幼苗期油菜的形态结构和生长过程的观测分析,提出了基于形态结构特征参数的幼苗期油菜三维形态数学模型及其可视化方法。根据油菜各器官的形态结构特征提取了不同的控制参数,并利用3次B啨zier曲面生成大小各异的油菜叶片与叶柄模型,同时采用上下底面积不同的圆柱体作为主茎模型,最后通过旋转、缩放、拼接等操作实现了幼苗期整株油菜的三维重建。[结果]该方法具有一定的可控性,简单方便,可快速构建幼苗期油菜几何模型。[结论]为油菜形态模型研究提供了参考。
[Objective] The research aimed to study the geometrical shape of rape in seedling stage. [Method] Through the observation and analysis of morphological structure and growth process of rape in seedling stage, a three-dimensional mathematical model of rapeseed at seedling stage and its visualization method based on morphological structural parameters were proposed. Different control parameters were extracted according to the morphological and structural features of various organs of rapeseed. Three times of B 啨 zier surfaces were used to generate rape leaves and petioles of different sizes. At the same time, a cylinder with different upper and lower bottom areas was used as the main stem model, Rotation, scaling, splicing and other operations to achieve seedling three-dimensional reconstruction of the whole rapeseed. [Result] The method had certain controllability, simple and convenient, and could quickly construct rape geometric model in seedling stage. [Conclusion] It provided a reference for the research of rape morphological model.