生理驱动的叶片生长变形算法  

Algorithm of Leaf Growth Driven by Physiological Model

作　　者：曾令秋[1] 朱庆生[1] 屈洪春[1] 刘骥[1] 吕中华 

机构地区：[1]重庆大学计算机学院,重庆400030 [2]重庆农业科学研究院,重庆401329

出　　处：《系统仿真学报》2011年第2期305-309,共5页Journal of System Simulation

基　　金：国家863计划(2006AA10Z233);国家自然科学基金(60773082)

摘　　要：提出一种利用反馈控制系统实现生理参数多尺度变化从而驱动叶片生长变形的算法。首先采用二维层次自动机产生植物各器官的分枝结构,通过内部扰动函数实现生理参数与植物生长刺激的互动。其次植物生长刺激在实现了对外部环境参数的影响的同时也修改各器官内部的细节,外部环境参数的变化反过来又对器官分枝结构实现了剪枝。然后在渠化管网假设基础上利用反应-扩散原理实现叶脉纹理的变化,最后通过可控网格面的卷曲和扭曲实现叶片的三维形变。仿真实验表明本方法能够较好的模拟植物叶片的纹理和形状随生理参数改变而变化的过程,能满足虚拟农业实验室植物器官动态展示的需求。A leaf growth algorithm,which realized the multiscale change of the physiological parameter by using the feedback control system,was proposed.The Plant Branching Structures（PBS） were described by Two Dimensional Hierarchical Automata（TDHA）,and the inner disturbance function completed the interaction between physiological parameter and plant growth stimulant.Organic details were changed by the growth stimulant which influenced the environment parameters,while the environment parameters pruning the PBS in return.The variation of vein texture was synthesized by reaction-diffusion principle based on the canalization hypothesis.The three dimension deformation of a leaf was implemented by bending the controllability grid.Experiment shows that proposed algorithm can simulate the varying process of leaf texture and its form with the changing physiological parameter effectively.It can meet the requirement of dynamic displaying plant organ in virtual agricultural laboratory.

关 键 词：反馈控制系统 二维层次自动机 剪枝 纹理变化 卷曲 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]