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Visualization Model of Virtual Plant Growth and its Application

Visualization Model of Virtual Plant Growth and its Applicat...

引用

international conference on Artificial Reality and Telexistence (ICAT)

作者： Qingrong Zhang Wenyong Wang Shaochun Zhong Ying Liang Qian Xu Xiaolin Quan Institute of Ideal Information Technology Northeast Normal University Changchun Jilin China

the virtual plant is a research area which develops rapidly along with the development of computer simulation technology, it has become the research hot spot in computer graphics, agriculture information technology and virtual teaching. In the paper, we apply the fractal theory in simulating plants growth process on computer. the constructed plant model can reflect the realistic plants' shape structure and its physiological phenomenon. the timer is used to realize the dynamic control of virtual plants' growth. the visualization model of virtual plants' dynamic growth is applied to the biological teaching, and we obtain a satisfactory result

关键词： Visualization Biological system modeling Plants (biology) computer simulation Education Application software computer graphics Agriculture Information technology Fractals

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Stereo Analysis Extension Based on BRDF Reciprocity

Stereo Analysis Extension Based on BRDF Reciprocity

引用

international conference on Electronics, Communications and computers (CONIELECOMP)

作者： A. Morales-Reyes M. Arias-Estrada Optics and Electronics Computer Science Department National Institute for Astrophysics Optics and Electronics Tonantzintla Puebla Mexico

this paper presents an extension of the binocular technique which considers reciprocal reflectance of surfaces. this particular property allows to recover depth information for surfaces where others stereo techniques failed, for example, textureless and highly specular surfaces. the consideration of an arbitrary BRDF (Bidirectional Reflectance Distribution Function) improves conventional stereo algorithms, in such a way that explicit or implicit assumptions about a reflectance function are not necessary and dense depth maps are obtained. Fixed specularities and correspondence between half-occluded regions reduce processing complexity which is an important advantage of this methodology. this paper provides a general geometry assembly to this approach extending its applicability to some specific areas where accurate depth measures are required. Several results from our implementation are shown using rendered ray-tracing stereo images.

关键词： Reflectivity Surface texture Stereo vision Lighting Rendering (computer graphics) Ray tracing Intelligent robots Quality control Biomedical imaging Layout

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Construct Low-Cost Multi-Projector Tiled Display System for Marine Simulator

Construct Low-Cost Multi-Projector Tiled Display System for ...

引用

international conference on Artificial Reality and Telexistence (ICAT)

作者： Xiuwen Liu Cui Xie Yicheng Jin Yong Yin Institute of Nautical Science & Technology Dalian Maritime University Dalian Liaoning China Department of Computer Science College of Information Science and Engineering Ocean University of China Qingdao Shandong China

Large high-resolution displays have been widely applied in various applications, such as entertainment, scientific visualization, high-fidelity collaborative environments, etc. A popular way to realize such displays is to tile multi-projector together to construct one large size display. In this paper, a low-cost multi- projector seamless tiled display system is constructed using commodity hardware and two-pass rendering technology for the marine simulator. the main technological problems of the display system are discussed, including geometry distortion adjustment and edge blending. Experimental results in marine simulator show that this framework is very cost- effective.

关键词： Large screen displays Marine technology Hardware Rendering (computer graphics) computer displays Collaboration Visualization Tiles Geometry graphics

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User-Assisted Parameterization of Polygonal Grids

User-Assisted Parameterization of Polygonal Grids

引用

international conference on Artificial Reality and Telexistence (ICAT)

作者： Xianli Xu Tianding Chen Institute of Communications and Information Technology Zhejiang Gongshang University Hangzhou China

Surface parameterization is a fundamental problem in computer graphics. It is very useful in many applications such as texture mapping, texture synthesis, interactive 3D painting, remeshing, multi-resolution analysis, and mesh compression. However, previous parameterization methods automatically and globally balanced the distortion of area or angle in the embedding functions. Such a parameterization may have low distortions but might not be suitable for some applications, such as remeshing. this paper describes a novel, user interactive framework for mesh parameterization. It presents a framework that allows users to locally adjust the parameterization intending to improve the perceptual quality of remeshing. Experiment results show such parameterizations provide better quality and computing rapidly for remeshing

关键词： Mesh generation Image sampling Sampling methods Surgery Springs Nonlinear distortion Humans Information technology computer graphics Application software

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Physically Based Animation of Tongue on Fire in a Periodic Domain

Physically Based Animation of Tongue on Fire in a Periodic D...

引用

international conference on Artificial Reality and Telexistence (ICAT)

作者： Peiyu Qin Chuanbo Chen Zehua Lv Hui Xia Institute of Computer Huazhong University of Science and Technology China

In this paper, a physically based approach for simulating tongue of fire is proposed. Realistic animation and real-time simulation are two objectives pursued in computer graphics applications. Traditional animation technique can obtain virtual movement, but it has difficulty for realistic movement. Compared with the traditional animation technique, physically based animation can represent realistic movement better. the incompressible Navier-Stokes equations are used in our model, and the operator splitting method including semi-Lagrangian scheme and fast Fourier transform is employed to split the model into external force term, advection term, diffusion term and projection term. Every step is stable, so the whole process is also stable. thus, the big time step can be taken to ensure real-time simulation. Compared with the traditional technique, this method can be taken for realistic animation and real-time simulation of tongue of fire in computer graphics applications. A simple visualization approach is also proposed based on density field for rendering tongue of fire animations in real time

关键词： Animation Tongue Fires Computational modeling computer simulation computer graphics Application software Navier-Stokes equations Fast Fourier transforms Visualization

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SIVP: A Toolkit for Integrating Visualization into Virtual Environment

SIVP: A Toolkit for Integrating Visualization into Virtual E...

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international conference on Artificial Reality and Telexistence (ICAT)

作者： Xiaohui Liang Yinghui Che Xiaoxiao Wu Key Laboratory of Virtual Reality Technology of Ministry of Education School of Computer Science Beihang University Beijing China

None-visible data modeling and representation is one of the key topics in virtual reality, since it greatly affects the sense of the user. In this paper we present how to visualize none-visible data in the virtual environment and a toolkit called synthetic information visualization platform (SIVP) is given. this toolkit includes two processes and the main components of SIVP are described. Finally, we demonstrate some works based on SIVP

关键词： Virtual environment Data visualization Virtual reality Object oriented modeling Atmosphere Solid modeling Temperature Atmospheric modeling Geometry Rendering (computer graphics)

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Machine vision Using Penumbra Analysis

Machine Vision Using Penumbra Analysis

引用

international conference on Electronics, Communications and computers (CONIELECOMP)

作者： J. Pinataro-Plata D. Baez-Lopez Departamento de Ingeniería Electrónica Universidad de las Américas-Puebla Cholula Puebla Mexico

Machine vision is the ability of a computer system to recognize object shapes, size, color, or distance to some point. Here we present a system capable to recognize the size of an object as well as its distance to an observation plane, by using the shadow that the object produces on this plane. the shadow is formed by a dark zone called umbra and an intermediate zone between the dark zone and the bright one called penumbra. the penumbra is used to correlate the diameter of the object producing it and the distance to the plane where the shadow is projected. the system is capable of measuring milimetric dimensions, with a precision of tenths of a milimeter,and to evaluate its distance to the plane with the same precision. MATLAB is used as the computing engine. Experimental results are reported.

关键词： Machine vision Extraterrestrial measurements Moon Mathematical model Sun MATLAB Earth computer vision Shape Engines

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Integrating Advanced GLSL Shading and XML Agents into a Learning-Oriented 3D Engine

Integrating Advanced GLSL Shading and XML Agents into a Lear...

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international conference on Electronics, Communications and computers (CONIELECOMP)

作者： E. Velazquez-Armendariz E. Millan Instituto Tecnológico y de Estudios Superiores de Monterrey Mexicali Mexico

Most of the existing 3D engines are overwhelmingly complex and do not integrate support for virtual characters. We have developed a teaching oriented 3D engine with support for such tasks as model loading and setup, shadows, level of detail as well as advanced shading techniques using the OpenGL Shading Language (GLSL), developed following Object-Oriented techniques and built upon standard open source components. We have also extended previous work by seamlessly incorporating XML driven crowds which can interact with the elements of the environment. the resulting system is a highly capable, yet easy to learn and use 3D engine which may be used for students in computer graphics to quickly build interactive applications and to provide a framework to begin using specialized shading techniques with GLSL. the engine also serves as a motivating development environment for creating visually attractive crowds of agents, aimed at students of introductory Artificial Intelligence courses.

关键词： XML Engines Artificial intelligence computer graphics Rendering (computer graphics) Education Load modeling Object oriented modeling Standards development Application software

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Range Detection Approach in Interactive Virtual Heritage Walkthrough

Range Detection Approach in Interactive Virtual Heritage Wal...

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international conference on Artificial Reality and Telexistence (ICAT)

作者： M.S. Sunar A.M. Zin T.M.T. Sembok Department of Computer Graphics and Multimedia Faculty of Computer Science and Information System Universiti Teknologi Malaysia Skudai Johor Malaysia Faculty of Information Science and Technology Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

Exploring virtual world will give a memorable experience to the users. Generally, they are expecting smooth navigation with high quality image drawn into their eyes. Nevertheless, when the virtual world is growing simultaneously with the number of objects, the navigation will be detained. Yet, the frame rates can become unacceptable. In this paper, we present and examine range detection approach for view frustum culling to effectively speed-up the interactive virtual heritage project namely Ancient Malacca Virtual Walkthrough. Normal six plane view frustum culling approach use the plane equation to test whether objects is within the visible region. However, range detection approach is different with normal six plane view frustum. It is based on camera referential point and tests the objects if they are in the viewing range. the results show that this approach is able to increase the rendering performance of the virtual walkthrough without sacrificing the visual quality.

关键词： computer graphics Application software Navigation Rendering (computer graphics) Visualization Testing Cameras Virtual environment Multimedia systems computer science

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Improved Approach for Snake Model Based on GHough and Dynamic Programming

Improved Approach for Snake Model Based on GHough and Dynami...

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international conference on Artificial Reality and Telexistence (ICAT)

作者： Xiaofei Feng College of Computer and Information Engineering Zhejiang Gongshang University Hangzhou Zhejiang China

Snake models are used more and more widely in applications of image analysis and computer vision. there are two challenging issues for the application of snake models: how to select the initial contour of the object automatically and how to obtain good convergence result. this paper introduces an improved approach for snake model that integrates with GHough transformation and dynamic programming algorithm. In the paper GHough transformation is used to help selecting the initial contour without the interference manually, and the dynamic programming is used to improve the convergence precision. the experimental results shows that such approach can not only solve the problem of selecting initial contour automatically, but also get good convergence results.

关键词： Dynamic programming Shape Convergence computer vision Application software Active contours Educational institutions Image analysis Heuristic algorithms Interference

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