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ISSN 1000-9000(Print)
/1860-4749(Online)
CN 11-2296/TP
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Edited by: Editorial Board of Journal Of Computer Science and Technology
P.O. Box 2704, Beijing 100190, P.R. China
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Undertaken by: Institute of Computing Technology, CAS
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  • Table of Content
      10 September 1996, Volume 11 Issue 5 Previous Issue    Next Issue
    For Selected: View Abstracts Toggle Thumbnails
    Articles
    Composed Scattering Model for Direct Volume Rendering
    Cai Wenli; Shi Jiaoying;
    Journal of Computer Science and Technology, 1996, 11 (5): 433-442. 
    Abstract   PDF(217KB) ( 1095 )   Chinese Summary
    Based on the equation of transfer in transport theory of optical physics,a new volume rendering model, called composed scattering model (CSM), is presented. In calculating the scattering term of the equation, it is decomposed into volume scattering intensity and surface scattering intensity, and they are composed with the boundary detection operator as the weight function. This proposed model differs from the most current volume rendering models in the aspect that in CSM segmentation and illumination intens…
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    OOADS:An Object-Oriented Design Model for Advertising CAD System
    Zhuang Yueting; Pan Yunhe; He Zhijun;
    Journal of Computer Science and Technology, 1996, 11 (5): 443-451. 
    Abstract   PDF(378KB) ( 1277 )   Chinese Summary
    The advances of computer graphics and imape processing have made it possible to design advertisements by computers. Presently, many commercial systems have come into being, such as CorelDraw and PhotoShop. All of them are developed out of the idea of graphics system or image system. For the ads designer, what is actually needed is a system developed from the point of view of ads design domain. In this paper, an object-oriented design model called OOADS is presented, around which five categories of operation…
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    Three-Dimensional Vector Field Visualization Based on Tensor Decomposition
    Liang Xundong; Li Bin; Liu Shenquan;
    Journal of Computer Science and Technology, 1996, 11 (5): 452-460. 
    Abstract   PDF(296KB) ( 1447 )   Chinese Summary
    This paper presents a visualization method called the deformed cube for visualizing 3D velocity vector field. Based on the decomposition of the tensor which describes the changes of the velocity it provides a teclmique for visualizing local flow. A deformed cube, a cube transformed by a tensor in a local coordinate frame, shows the local stretch, shear and rigid body rotation of the local flow corresponding to the decomposed component of the tensor. Users can interactively view the local deformation or any …
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    Surface Reconstruction for Cross Sectional Data
    Xu Meihe; Tang Zesheng;
    Journal of Computer Science and Technology, 1996, 11 (5): 471-479. 
    Abstract   PDF(374KB) ( 1273 )   Chinese Summary
    In this paper, a new solution to the problem of reconstructing the surface of 3D objects over a set of cross-sectional contours is proposed. An algorithm for single branch contours connection, which is based on the closest local polar angle method, is first presented. Then the branching problems (including non-singular branching and singular branching) are completely solved by decomposing them into several single-branching problems. Finally, these methods are applied to the reconstruction of the external su…
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    Displaying of Details in Subvoxel Accuracy
    Cai Wenli; Cheil Tianzhou; Shi Jiaoying;
    Journal of Computer Science and Technology, 1996, 11 (5): 480-488. 
    Abstract   PDF(364KB) ( 1236 )   Chinese Summary
    Under the volume segmentation in voxel space, a lot of details, some fine and thin objects, are ignored. In order to accurately display these details, this paper has developed a methodology for volume segmentation in subvoxel space. In the subvoxel space, most of the "bridges" between adjacent layers are broken down.Based on the subvoxel space, an automatic segmentation algorithm reserving details is discussed. After segmentation, volume data in subvoxel space are reduced to original voxel space. Thus, the…
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    A Prototypical 3D Graphical Visualizer for Object-Oriented Systems
    Hua Qingyi; Heinz-Dieter Bocker; Dong Cheng;
    Journal of Computer Science and Technology, 1996, 11 (5): 489-496. 
    Abstract   PDF(245KB) ( 1341 )   Chinese Summary
    This paper describes a framework for visualizing object-oriented systems within a 3D interactive environment. The 3D visualizer represents the structure of a program as Cylinder Net that simultaneously specifies two relationships between objects within 3D virtual space. Additionally it represents additional relationships on demand when objects are moved into local focus. The 3D visualizer is implemented using a 3D graphics toolkit, TOAST, that implements 3D widgets and 3D graphics to ease the programming ta…
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    A Boundary Element Method for Simulation of Deformable Objects
    Xu Meihe; Tang Zesheng;
    Journal of Computer Science and Technology, 1996, 11 (5): 497-506. 
    Abstract   PDF(411KB) ( 1311 )   Chinese Summary
    In this paper, a boundary element method is first applied to real-time animation of deformable objects and to simplify data preparation. Next, the visible external surface of the object in deforming process is represented by B-spline surface, whose control points are embedded in dynamic equations of BEM. Finally, the above method is applied to anatomical simulation. A pituitary model in human brain, which is reconstructed from a set of anatomical sections, is selected to be the deformable object under actio…
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    Applying Virtual Reality to Molecular Graphics System
    Chang No Yoon; Myung Hwan Chi; Heedong Ko; Jongsei Park;
    Journal of Computer Science and Technology, 1996, 11 (5): 507-511. 
    Abstract   PDF(403KB) ( 1523 )   Chinese Summary
    Molecular graphics can be thought of as a window to the computer through which the chemist expresses ideas for computational evaluation and receives results in an understandable form. Furthermore, with beautiful graphic images it can give out the realistic molecular model like a real thing in real world.Molecule has various properties including volume, electronic, van der Waals forces, etc. These properties are very important to understand the molecular world. So if the virtual reality tools are used, then …
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    Integration Model of Eye-Gaze, Voice and Manual Response in Multimodal User Interface
    Wang Jian;
    Journal of Computer Science and Technology, 1996, 11 (5): 512-518. 
    Abstract   PDF(304KB) ( 1593 )   Chinese Summary
    This paper reports the utility of eye-gaze, voice and manual response in the design of multimodal user interface. A device- and application-independent user interface model (VisualMan) of 3D object selection and manipulation was developed and validated in a prototype interface based on a 3D cube manipulation task. The multimodal inputs are integrated in the prototype interface based on the priority of modalities and interaction context. The implications of the model for virtual reality interface are discuss…
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    Theory and Practice of the Stereo-View on the CRT Screen
    Xia Yunjun;
    Journal of Computer Science and Technology, 1996, 11 (5): 519-528. 
    Abstract   PDF(269KB) ( 1141 )   Chinese Summary
    Of the various kinds of research on the Virtual Reality and GIS, stereo-view is one of the key technologies . The following two aspects are covered in this paper. (1)Physiological fundamental of the natural binocular stereo-vision, theory of 3D color TV and the stereo-view on the CRT screen are presented, especially the theory of widely adopted Time-Division System is introduced. (2) The preliminary practice for using the sterecrview technology on the screen to the terrain visual simulation is described, an…
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CN 11-2296/TP

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