虚拟植物建模技术研究及其数据管理系统设计

发布时间：2019-04-13 17:46

【摘要】：虚拟植物技术是根据植物的生长机理,运用计算机技术在二维或者三维空间中进行显现的一门技术。它涉及多个学科,例如:计算机科学、生物学、图形图像学、应用数学等,并且在计算机辅助教学、影视娱乐、自然景观设计、虚拟农业和科学研究等领域有着突出的应用价值。如今,随着计算机信息技术的飞速发展,虚拟植物的研究也经历了从注重植物外在的形态结构模拟,发展到针对其内部生长机制的仿真,再到现在的考虑与自然环境的相互影响,不断地延展深入。本文在众多学者前辈的研究基础上,主要针对运用L-系统仿真出的植物模型太过理想化、不符合光照原理的问题进行探索研究,提出自己看法,并设计了算法对其进行优化验证;另外,针对整个建模过程中需要数据收集、整理的繁琐过程,特设计了一个配套的数据管理系统,提高了工作效率。至于各章详细的工作内容,分条概括如下:(1)首先结合我国的农业背景条件,提出进行虚拟植物研究的必要性;然后介绍了虚拟植物的国内外研究现状,分析各种主要建模技术的应用特点,并就应用最广泛的L-系统技术进行详细的阐述,从其产生起源到后来的蓬勃发展,已经发展成为一门最核心的虚拟植物技术;最后将全文的研究内容和创新点进行简单的说明。(2)主要介绍了L-系统的理论知识,从简单的字符定义及重写规则的说明,再到应用图形的形象展示,系统地将L-系统的核心思想进行了阐述;然后与现实植物进行关联,分别在二维和三维空间中,运用特有的字符、规则及算法进行演示。最后将重写字符与具体的图形结构进行绑定,并将最终的植物模型进行了图例呈现。(3)针对植物模型不符合光照原理且不体现黄金分割特征的问题,提出了一种基于蚁群觅食原理的蚁群优化算法。首先对Open L-System模拟的植物枝叶分布进行分析;然后,采用设计的蚁群优化算法对虚拟植物枝叶在趋光性的竞争问题上进行优化;最后,结合植物的黄金分割特征实验仿真出植物模型。(4)针对植物建模前期数据采集量大、整理困难,建模过程中产生新的数据难以辨别处理,以及后期数据的储存安全等问题,设计了一套植物数据管理系统。首先,就系统的目标需求,进行了可行性分析,提出系统的总体思路和框架;然后根据其思路和框架进行E-R模型设计和数据库表的绘制;最后,选取一种植物将系统的实现功能、流程进行预展示。(5)回顾全文,总结论文做的主要工作及存在的缺点,并对未来的工作进行展望。
[Abstract]:Virtual plant technology is based on plant growth mechanism, using computer technology to appear in two-dimensional or three-dimensional space. It covers a wide range of disciplines, such as computer science, biology, graphics and graphics, applied mathematics, etc., and in computer-assisted instruction, film and television entertainment, natural landscape design, Virtual agriculture and scientific research have outstanding application value. Nowadays, with the rapid development of computer information technology, the research of virtual plants has gone from paying attention to the simulation of the external morphology and structure of plants to the simulation of its internal growth mechanism. Then to the present consideration and natural environment interaction, continue to expand in depth. On the basis of the research of many scholars, this paper mainly aims at the problem that the plant model simulated by L-system is too idealized and does not accord with the principle of illumination, and puts forward its own opinion. And designed the algorithm to carry on the optimization verification to it; In addition, aiming at the cumbersome process of data collection and collation in the whole modeling process, a matching data management system is designed to improve the work efficiency. As for the detailed work contents of each chapter, it is summarized as follows: (1) first of all, combining with the agricultural background conditions in China, the necessity of virtual plant research is put forward; Then the research status of virtual plants at home and abroad is introduced, the application characteristics of various main modeling techniques are analyzed, and the most widely used L-system technology is described in detail, from its origin to the subsequent vigorous development, Has developed into a core virtual plant technology; Finally, the research contents and innovations of the full text are simply explained. (2) the theoretical knowledge of the L-system is mainly introduced, from the simple character definition and the description of the rewriting rules, to the display of the image of the application graph. The core idea of L-system is expounded systematically. Then associated with the real plants, respectively in two-dimensional and three-dimensional space, the use of unique characters, rules and algorithms to demonstrate. Finally, the rewrite character is bound with the concrete graphic structure, and the final plant model is represented by legend. (3) aiming at the problem that the plant model does not conform to the principle of illumination and does not reflect the golden section feature, An ant colony optimization algorithm based on ant colony foraging principle was proposed. Firstly, the distribution of plant branches and leaves simulated by Open L-System is analyzed, and then, the optimized ant colony optimization algorithm is used to optimize the competition of phototaxis between the branches and leaves of virtual plants. Finally, the plant model is simulated by experiments on the golden section characteristics of plants. (4) in view of the large amount of data collection in the early stage of plant modeling, it is difficult to sort out, and it is difficult to distinguish and process the new data produced in the modeling process. A set of plant data management system is designed in this paper. Firstly, the feasibility analysis of the target requirements of the system is carried out, and the overall idea and framework of the system are put forward, and then the design of E / R model and the drawing of database table are carried out according to the thought and framework of the system. Finally, select a plant to realize the function of the system, the process of pre-display. (5) Review the full text, summarize the main work and shortcomings of the paper, and look forward to the future work.
【学位授予单位】：河南师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP315;S126

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