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In order to solve the visual problems of large-scale scientific computing, the project imports the middleware for communication, and extends the classic client-server structure into client-commware-server structure. The paper proposes a visual system model for large-scale scientific computing based on client-commware-server structure, PC-cluster and large-scale display technology. The visual system...
This work recovered an ancient crowd activity for virtual heritage, virtual reality technique was used to reconstruct and imitate cultural space and crowd cultural activity in warring states time. According to literal recordation, ancient images and ancient relic, we reconstructed characters, finery and architecture by 3D modeling technique. Motion was collected from actors by motion capture technique...
The occurrence and spread of the fire is a complicated and stochastic process. The paper introduces a fire simulation model based on the particle system and discussed the rule of occurrence and spread in the fire hazard. The fire particle system is implemented by VRML. In order to monitor the spread of the fire, a Java applet is developed to show the fire data by external authoring interface. This...
We design and implement virtual object selection and manipulation in VE using 3-DOF trackers and data glove, including ray-casting technique using 1 tracker and 1 data glove and go-go technique using 2 trackers and 1 data glove. The cost of these techniques is reduced because they both do not need the 6-DOF tracker that must be operated in a well-prepared environment. User can grab and release virtual...
Based on GIS as the main carrier, our real time computer simulation system of urban logistics distribution vehicle routing optimization precisely measures and marks the information of distribution site, providing true and available information for routing optimization, performing low cost and highly efficient operation on vehicle scheduling by the distribution center through optimization algorithm...
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...
Soft tissue deformation has become bottle-neck in visual surgery technique. Based on the review of the current deformation methods and the analysis of soft tissue biology mechanics characteristic, the simple style mass-spring model is applied to soft tissue deformation in orthodontic simulation. In order to improve algorithm complexity, a simplification mass-spring system dynamic equation is established...
Omni-directional vision sensor (ODVS) is one of important components of sensor networks. Design of ODVS, embedded Linux ODVS, video server of ODVS, and software development of ODVS applications are studied in this paper. In addition, the applications of multi-object automatic tracking systems based on ODVS are described in details. Moreover, experimental results are proposed. This research is significant...
In the ATC domain, simulated training is an effective approach to cultivate controllers, and ATC simulators providing vivid simulated environment for the trainees are the key devices with high complexity. In this paper, the software product line approach is proposed to build a group of ATC simulators from a common set of core assets. As the core assets shared across our ATC simulators, the high-level...
In order to make 3D model representing Pinus Massoniana more realistic, field investigation and measurements were conducted in Wuyi Plantation in Zhangping City, Fujian Province, P.R. China. We measured parameters characteristic of Pinus Massoniana aerial architecture, then analyzed and quantified relationship between plant components and growth law. Based on the local-to-global model, the tree was...
Motion blending, which allows the generation of new motions by interpolation or transition between motion capture sequences, is widely accepted as a standard technique in computer animation. But the transition time and duration is manually chosen in traditional blending approaches and all frames of motion clips must be computed to select the right transition point. This paper presents a new motion...
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,...
A general IBR (image based rendering) approach schema for synthesis image of new viewpoint is presented in this paper. Giving a series of images of an environment on closely spaced two circles viewpoints the proposed algorithm can generate perspective intermediate images of the environment in any viewpoint between two circles. In this case the same environment is displayed from the view of a virtual...
It is a challenging task to provide real-time, realistic 3D graphics on mobile devices like PDAs, Smart phones, etc. for resource constraints. Considering the mobile devices are lack of powerful 3D graphics hardware support, in this paper we present a point-based rendering of 3D models - that is, getting regular sampling points in 3D space and then projecting all the sampling points to the screen...
Algorithms are proposed to automatically locate the foot anatomical points from scanned 3D point data based on a novel method that uses the pternion point for foot alignment, whereby variations in the different dimensions are minimized. The detected foot malleoli and arch point are used to classify the foot type. Based on the automatically detected anatomical points, 9 foot dimensions of 10 participants...
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...
Based on analyzing the color rendering principle of scanning objects and the causes of color error, a new algorithm of color space conversion for scanning image is proposed. First, some parameters of Neugebauer equation and Yule-Nielson equation are reinterpreted which makes them able to be used for non-dot image and which can only be used for dot image originally. Then, the paper presents the deduction...
In order to understand the generation mechanism of various types of human errors in industrial production, we have developed a human information-processing model to simulate human operators' behavior under abnormal situations. In this study we proposed a new human model and installed the model on a PC. The developed model is used to analyze the visual process when the operator monitors the overview...
A method for virtual reality and simulation of the earthquake-induced urban hazard is developed using an artificial neural network (ANN) and components geography information system (COMGIS). The research shows that: a) COMGIS technique is an effective method to realize the coupling of the GIS module and hazard simulation module, b) The site earthquake influence field under the scenario earthquake...
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