Research On Three-dimensional Shape Modeling And Mesh Model Optimization Method Of Tomato

Digital plant combines mathematics, computer graphics, agriculture, botany, ecloogy and other disciplines. In recent years, with the development of science and technology, research of Digital plant has achived fruitful results. The combinationof China Agricultural research and Digital plant has become more and more closely. tomato is one of the most popular vegetables in world. It is very important to construct digital technology system of tomato and analyze, design and simulation of tomato life process and production process use of digital technology.In this paper, in order to implement the visualization and digital design of three-dimensional morphology of tomato, Firstlywe take a long-term observation and analysis of tomato morphological structure, and measure much data of morphological structure. Secondly, we analyze the spatial topology of tomato.Thirdly, we take a statistical classification of leaves and collateral.At last, we build some templates for different organs based on the feature of complex and diversity of tomato organs. The extracted parameters has a clear significance of agricultura. In this paper, we simulate the morphological structure of tomato truly, and improve the model relistic by using technology and method of texture, color rendering and light. We realize the interactive design of tomato organ,individual and group model using the template technology and measured data, and then develop a3Dvisualization interactive design software of tomato. In addition, according to the characteristics of plant organ models, we achieve a plant model mesh optimization, and combine remeshing technique for plant organ, which can retain morphological features, we also develop a plant model remeshing plug based on the above work. At last, we take a verification of projection area of the model designed by this paper and the real plant model, the errors are in allowable range, so not only the method in this paper proved to be reliability, but also it has a certain refence significance of the method to modeling work of other diversity plant.The main research work includes the following aspects:1. Three-dimensional modeling of tomato organs. In this paper, we use different modeling methods to reconstruct different tomato organs. Among them, forms of tomato leaves, branches and othor organs have a diversity of characterstics. According to tomato organ deformation characteristics, we set main characteristic parameters of organs. There will be big workload that take a complete modeling of each real organs, so we reconstruct the organs throgh modeling the classification of leaves and branchs.2. Three-dimensional modeling of tomato individual and group. According to the actual observation and statistical analysis, we get the characteristic morphology parameters of tomato individual and group. Then, combining template model of the above described organs morphological features, we realiza parametric design of tomato individual and group, based on the the major parameters.3. Optimization of plant mesh. Combineing the feature of plant model, we take mesh optimization of main organs which preserving features, based on plant model, using remeshing method, the optimization makes the result grid model has better rules and computability.4. Three-dimensional visualzation interactive design software development of tomato. Though translating, rotating and scaling of tomato organs, we develop a tomato individual and group design system with Visual Studio and OpenGL. By this system, we achivethree-dimensional visualzation interactive design of tomato, from organ,individual and group scale, and we can improve the quality of existing grid by remeshing.