西瓜三维形态几何建模和真实感绘制技术研究  

Techniques for Modeling 3-D Shape and Realistic Rendering of Watermelon

作　　者：赵春江[1] 陆声链[1] 郭新宇[1] 李长锋[1] 杨月英[1] 

机构地区：[1]国家农业信息化工程技术研究中心,北京100097

出　　处：《中国农业科学》2008年第12期4155-4163,共9页Scientia Agricultura Sinica

基　　金：国家高技术发展计划(2007AA10Z226);北京市自然科学基金项目(4081001);国家"十一五"科技支撑计划(2006BAD10A07)

摘　　要：【目的】实现西瓜形态的数字化设计和生长的可视化模拟。【方法】提出一种基于B样条曲线的西瓜器官几何造型方法,并利用位置信息和茸毛生成技术描述器官的局部细节特征;依据西瓜器官的主要形态特征,提取器官几何模型的主控参数,参数具有较明确的农学意义,结合模板技术实现西瓜主要器官和植株三维形态结构的交互式设计;同时也可以根据西瓜植株拓扑结构发展规律,通过动态驱动参数化器官几何模型的方法实现植株生长的可视化模拟。【结果】本文提出的西瓜器官三维形态建模和植株结构交互式生成方法易于与农业知识结合,所重构的形态模型具有较好的真实感效果。【结论】文章提出的方法具有较好的普适性,为瓜果类作物三维形态的交互设计和形态模拟提供了实用的方法和手段。【Objective】This study aimed to provide techniques for digital designing the 3-D shape and visual simulating its growth of watermelon.【Method】A B-splines based method has been proposed for modeling the shape of watermelon organs,with use of position information and technique for constructing hairs of organs to describe local detail features and to augment the realistic effects.Several principal control parameters with explicit biological background for these geometric models of organs were extracted based on the morphological features of watermelon.Interactive designing the 3-D shape and dynamic simulating the morphological development of these organs were implemented by using template techniques.Further,visual simulating the process of watermelon growth could be implemented by driving these parameterized geometric models according to the physiological rule of topological structure of watermelon.【Result】The proposed methods for modeling the 3-D shape of organs and simulating the growth of watermelon could be integrated easily with agricultural knowledge,and the generated morphological models have realistic effects.【Conclusion】The flexibility and suitability of the proposed methods can be applied to other crops,especially melon and fruit crops.

关 键 词：几何建模 植物形态模拟 交互设计 西瓜 

分 类 号：S651[农业科学—果树学]