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检索条件"任意字段=16th International Conference on Computer Graphics and Vision, GraphiCon 2006"

共 231 条记录，以下是161-170 订阅

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An augmented reality system for computer maintenance

引用

16th international conference on Artificial Reality and Telexistence, ICAT 2006

作者： Kang, Bo Ren, Peng Ke, Changzhi School of Automation Engineering Mobile Computing Center University of Electronic and Science Technology of China Chengdu 610054 China

ISBN: (纸本)3540497765

Augmented reality (AR) aims to create user interface in which virtual objects are overlaid on the physical environment. Equipment maintenance and training tasks are excellent domains for augmented reality application. In this paper, a prototype of video see-through based AR system for training and supporting to computer maintenance is presented. A vision and inertial based hybrid tracking method is adopted in the prototype and discussed in details. A WIMP-based user interface which is simple, convenient and informative is designed for this system. Experimental results illustrate the effectiveness of the prototype. Keywords: Augmented reality, Maintenance, Tracking, User interface. © 2006 Springer-Verlag Berlin/Heidelberg.

关键词： User interfaces

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Multi-view video composition with computer graphics

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16th international conference on Artificial Reality and Telexistence, ICAT 2006

作者： Ignatov, Artem Kim, Manbae Dept. of Computer Info. and Telecom Kangwon National University 192-1 Hyoja2dong Chunchon Kangwondo 200-701 Korea Republic of

ISBN: (纸本)3540497765

Multi-view video has recently gained much attraction from academic and commercial fields because it can deliver the immersive viewing of natural scenes. this paper presents a composition method of generating composite views combined with graphic objects. First we generate virtual views between multi-view cameras using depth and texture images of the input videos. then we mix graphic objects to the generated view images. A distinctive feature of our approach is that we use an identical coordinate system for camera, virtual, and graphics views. the reason for using the same system for all types of cameras is the ability of full interactions between real scene and graphic objects. Another merit is that the occlusion between them is handled automatically by a graphics engine because z values of real scene and graphic objects are stored in the same z buffer. We present experimental results that validate our proposed method and show that graphic objects could become the inalienable part of the multi-view video. For the validation of our method we used multi-view sequences where a graphic object is mixed into camera and virtual images. Keywords: view synthesis, composition, multi-view, image-based rendering. © 2006 Springer-Verlag Berlin/Heidelberg.

关键词： Cameras

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A simple, Efficient method for real-time simulation of smoke shadow

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16th international conference on Artificial Reality and Telexistence, ICAT 2006

作者： Yang, Minghao Fei, Guangzheng Shi, Minyong Zhan, Yongsong Computer and Software School Communication University of China Beijing China Animation School Communication University of China Beijing China

ISBN: (纸本)3540497765

this paper proposes a simple, efficient method for real-time smoke shadow simulation. In this method, 3D density fields of smoke are directly projected and accumulated into a shadow buffer. Diffusion scheme is creatively taken from fluids dynamics to "soft" shadow texture. these two steps are called Direct-Projection-Diffusion (DPD) which is computationally inexpensive in comparison with traditional methods for participating media volume rendering. For shadow interaction, projective texturing based on the programmable graphics hardware is used to project the shadow texture onto any object's surface in the scene. the test result shows that our method is efficient and is feasible to solve the problem of real-time smoke shadow simulation in 3D computer games and in 3D animation initial production. Keywords: Smoke Shadow Simulation, Diffusion, Shadow Texture, GPU, Projective Texturing. © 2006 Springer-Verlag Berlin/Heidelberg.

关键词： Smoke

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Enhanced 3D interaction with augmented visual information

引用

16th international conference on Artificial Reality and Telexistence, ICAT 2006

作者： Lee, Dongwook Park, Jinah Computer Graphics and Visualization Lab Digital Media Lab Information and Communications University 119 Munji-ro Yusong-gu Daejeon Korea Republic of

ISBN: (纸本)3540497765

As 3D graphics environment becomes the standards for most computer systems, it is natural to seek a 3D input device for manipulating an object in a 3D virtual world. Unlike 2D interface, however, 3D interface creates perceptual mismatches including depth perception problem. the objective of our research is to enhance the depth perception and 3D interaction by providing additional information based on the pictorial depth cues and interaction cues. In this paper, we investigated how to incorporate such cues. We designed two kinds of additional viewport that are to be placed on the top of the interaction window. One is a basic additional view with a different FOV, and the other is a compound view made up with 9 small sub-views with varying viewing direction. We also implemented two behaviors of the augmented view with respect to user interaction: Interactive Resizing and Holding-Z. through a set of user performance tests, we have concluded that the basic additional view with Interactive Resizing and the additional compound view made statistically significant improvement on the performance of 3D interaction with a 3D input device. Keywords: Virtual Environment, Human computer Interaction. © 2006 Springer-Verlag Berlin/Heidelberg.

关键词： Virtual reality

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View-dependent simplification of complex urban scenes using weighted quadtrees

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16th international conference on Artificial Reality and Telexistence, ICAT 2006

作者： Lee, Bum-Jong Park, Jong-Seung Sung, Mee Young Department of Computer Science and Engineering University of Incheon 177 Dohwa-dong Nam-gu Incheon 402-749 Korea Republic of

ISBN: (纸本)3540497765

this article describes a new contribution culling method for the view-dependent real-time rendering of complex huge urban scenes. As a preprocessing step, the view frustum culling technique is used to cull away invisible objects that are outside the view frustum. For the management of the levels-of-detail, we subdivide the image regions and construct a weighted quadtree. the weight of each quadtree node is defined as the sum of weights of all objects contained in the node or its child nodes. the weight of an object is proportional to the view space area of the projected object as well as the distance from the viewpoint. Hence, large buildings in the far distance are not always culled out since their contributions to the rendering quality can be larger than those of near small buildings. We tested the proposed method by applying it to render a huge number of structures in our metropolitan section which is currently under development. Experimental results showed that the proposed rendering method guarantees real-time rendering of complex huge scenes. © 2006 Springer-Verlag Berlin/Heidelberg.

关键词： Rendering (computer graphics)

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Wearable multimodal interface for helping visually handicapped persons

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16th international conference on Artificial Reality and Telexistence, ICAT 2006

作者： Shin, Byeong-Seok Ahn, Honam Kim, Gye Young Department of Computer Science and Information Engineering Inha University 253 Yonghyeon-Dong Nam-Gu Inchon 402-751 Korea Republic of School of Computing Soongsil University 511 Sangdo-Dong Dongjak-Gu Seoul Korea Republic of

ISBN: (纸本)3540497765

Handicapped Persons who partially or entirely lose their sensory for external stimuli struggle to lead on daily life due to lack of the ability of sensors. We propose a system to provide alternative sensory for visually handicapped persons with wearable multimodal interface. It acquires visual information with a variety of sensors, converts them to high-level information, and represents the information with alternative sensory such as sound or vibration. the system is mainly composed of two sub-systems. the first is obstacle detection and avoidance module with multiple ultrasound sensors and a tracker. It helps handicapped person to access to target place easily and safely. the second is stereo vision system to provide ability to track some target objects, to recognize persons around a user, and to understand color and gray-level of a specific object. Since our system is designed for wearable computers, visually handicapped persons carry and operate it very easily. © 2006 Springer-Verlag Berlin/Heidelberg.

关键词： Obstacle detectors

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Gesture recognition based on context awareness for human-robot interaction

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16th international conference on Artificial Reality and Telexistence, ICAT 2006

作者： Hong, Seok-Ju Setiawan, Nurul Arif Kim, Song-Gook Lee, Chil-Woo Intelligent Media Lab Department of Computer Engineering Chonnam National University Gwangju Korea Republic of

ISBN: (纸本)3540497765

In this paper, we describe an algorithm which can naturally communicate with human and robot for Human-Robot Interaction by utilizing vision. We propose a state transition model using attentive features for gesture recognition. this method defines the recognition procedure as five different states;NULL, OBJECT, POSE, Local Gesture and Global Gesture. We first infer the situation of the system by estimating the transition of the state model and then apply different recognition algorithms according to the system state for robust recognition. And we propose Active Plane Model (APM) that can represent 3D and 2D information of gesture simultaneously. this method is constructing a gesture space by analyzing the statistical information of training images with PCA and the symbolized images are recognized with HMM as one of model gestures. therefore, proposed algorithm can be used for real world application efficiently such as controlling intelligent home appliance and humanoid robot. Keywords: Gesture Recognition, Context Awareness, PCA, HMM. © 2006 Springer-Verlag Berlin Heidelberg.

关键词： Gesture recognition

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Remote Awareness of Complicated Pattern Group in Ubiquitous Collaborative graphics Editing Systems

Remote Awareness of Complicated Pattern Group in Ubiquitous ...

引用

international conference on Artificial Reality and Telexistence (ICAT)

作者： Bo Jiang Guozheng Wang College of Computer and Information Engineering Zhejiang Gongshang University China

the proliferation of computer devices and wireless networks allows users to access pattern information and collaborative edit graphics with others in ubiquitous environment. However, the limitation of display size and unreliable network of these embedded devices makes it hard for mobile users to browse grouped complicated pattern objects efficiently. We propose semantic group mapping that enable group node representation form on mobile devices and the corresponding operation sending scheme that can provide on demand detailed group information and maintain the consistency of pattern replicas on mobile site. the scheme is realized in our prototype system of collaborative graphics editing system that can work well in ubiquitous environment.

关键词： Collaboration Collaborative work Pervasive computing Mobile computing computer graphics computer networks computer displays Personal digital assistants Educational institutions Wireless networks

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A Point-Based Rendering Approach for Mobile Devices

A Point-Based Rendering Approach for Mobile Devices

引用

international conference on Artificial Reality and Telexistence (ICAT)

作者： Zhiying He Xiaohui Liang Technology of Virtual Reality lab Beihang University Beijing China

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 by splatting. It has better performance results and can represent various information of object. It also has optimal rendering throughput.

关键词： Rendering (computer graphics) Mobile computing Image sampling Sampling methods Streaming media Personal digital assistants Hardware throughput computer graphics Network servers

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Disparity weighted histogram-based object tracking for mobile robot systems

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16th international conference on Artificial Reality and Telexistence, ICAT 2006

作者： Choi, Cheolmin Ahn, Jungho Lee, Seungwon Byun, Hyeran Dept. of Computer Science Yonsei University Shinchon-dong Seodaemun-gu Seoul 120-749 Korea Republic of

ISBN: (纸本)3540497765

A vision-based real-time human detection and tracking capability is one of the key components of surveillance systems, human computer interfaces and monitoring systems. In this paper, we propose a method which uses color and disparity information obtained with a stereo camera. In order to achieve optimal performance with respect to detection or tracking of objects, it is better to consider multiple features together. We have developed a tracking method in which color and disparity information can be combined in a histogram. We used skin color and disparity distribution information to distinguish between different people. For human tracking, we propose a color histogram that is weighted by the disparity distribution of the target. the proposed method is simple and robust for moving camera environments and overcomes the drawbacks of conventional color histogram-based tracking methods. Experimental results show the robustness of the proposed method in environments with changing backgrounds and the tracking capabilities of targets which have similar color distributions as backgrounds or other targets. the proposed method can be used in real-time mobile robot applications. Keywords: Real-time, color histogram, mobile robots. © 2006 Springer-Verlag Berlin/Heidelberg.

关键词： Mobile robots

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