基于变形的植物叶片边缘锯齿模拟  

Deformation⁃based simulation of plant leaves with serrated edges

作　　者：马思远 陆玲[1] 任彪 MA Siyuan;LU Ling;REN Biao(East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学,江西南昌330013

出　　处：《现代电子技术》2022年第11期46-50,共5页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(61761003):基于器官造型的植物精细重建。

摘　　要：针对叶缘具有锯齿特征的植物叶片进行研究,提出一种基于变形的叶片边缘锯齿的形状模拟方法。根据实际的树叶图像提取叶片的长宽比、圆形度等形状信息,确定基础矩形的参数;将变形函数应用在生成的矩形平面上,模拟矩圆形、椭圆形、卵圆形和倒卵圆形四种叶形;查询标本图鉴,归类叶片的轮廓信息,如锯齿类型、锯齿朝向、锯齿密度和高度等;利用正弦函数及其组合对叶片边缘再次变形,模拟圆形、尖形、直形和渐尖形锯齿;通过改变锯齿的方向,形成不同效果的锯齿;配合叶尖和叶基完成叶片模型构建。通过与真实图片对比,表明该方法能够快速、简单地反映不同类型植物叶片边缘锯齿的形状,较好地保持了植物叶片原有的轮廓特征,降低了叶片模型构建的复杂度。The plant leaves with serrated edges are studied,and a deformation⁃based shape modeling method for plant leaf with serrated edges is proposed.According to the actual leaf image,the shape information,for example,the aspect ratio and degree of circularity of the leaf,is extracted to determine the parameters of the basic rectangle.The deformation function is applied to generated rectangular surface to simulate the four leaf shapes,named oblong shape,elliptic shape,ovate shape and obovate shape.The specimen illustration is checked,and the contour information of leaves,for example,the type of serration,serration orientation,serration density and height,are classified.The sinusoidal function and its combination are used to deform the leaf edge and simulate the serration with the round shape,pointed shape,straight shape and acuminate shape.And then,the serration with different effects are formed by changing the direction of serrations.In coordination with the leaf tip and leaf base,the establishment of the leaf model is finally completed.In comparison with the real pictures,it shows that this method can quickly and simply reflect the shape of edge serrations of different types of plant leaves,keep the original contour features of plant leaves,and reduce the complexity of building leaf models.

关 键 词：植物叶片 真实感 可视化 虚拟植物 几何形状 参数方程 变形函数 

分 类 号：TN911.73-34[电子电信—通信与信息系统] TP391.9[电子电信—信息与通信工程]