• Proceedings of the Korean Information Science Society Conference
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• 2001.10b
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• pp.259-261
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• 2001

본 논문에서는 네트워크를 통해 공유되는 가상공간에 참가자가 분신(아바타) 또는 실물 동영상의 형태로 자유로이 참가하여 가상세계를 현실감 있게 공유할 수 있는 시스템을 제안한다. Java3D를 이용하여 컴퓨터그래픽과 실영상을 실시간에 합성 렌더링함으로써 3차원 가상공간을 구현하고 있다. 분산환경에서의 실험을 통해 기술적 가능성을 제시한다.

• 제어로봇시스템학회:학술대회논문집
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• 2000.10a
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• pp.277-277
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• 2000

This paper's purpose obtain information of three dimension using a camera. This system embody to know the height of object using triangle method between reference point of circumstance and object. As I use java program, it is possible to make system regardless of operating system, set up the system. By using comportable USB port camera, we used to everywhere without the capture board. We can use the internet by using the java's JMF and applet everywhere, we regard the camera as fixed.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.1
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• pp.233-240
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• 2000

We designed a 3D solid modeler based on the web, which was independent from platforms, which could be executed without 3D graphics softwares. In this paper, we show the design of system libraries and how to implement in Java 3D. A client connects to the solid modeler server, design solid model, stores the data as the various file format, and displays the data from other CAD systems. This solid modeler can support the detail design as 3D graphics features such as viewing, rendering, animating are available.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.8
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• pp.1709-1715
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• 2005

This paper describes the development of 3-D web graphic library for dynamic web graphic design. The 3-D web graphic library developed in this per supports creation of 3-D objects like cube and sphere objects, elimination of hidden line and surface, and the shading of diffuse and specular reflections. It provides, in drawing, perspective projection of an object depth first sort of multiple objects, and wire frame and solid models. It also supports texture mapping function for realistic and dynamic web application in application software. Each created 3-D object gives functions for the scaling, translation, and rotation of itself. It can be used for the development of dynamic web application software and the advertisement of information for business and tourism as a 3-D web graphic library engine. It is written in 'Java' language and runs on web browsers with Java virtual machine without any dependancy of client computer system.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.647-649
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• 1998

최근 WWW상에서 VRML 기반의 3차원 가상공간 구현이 활발하게 진행되고 있다. 대부분의 시스템이 VRML기능의 한계로 인해 다수사용자의 참여와 사용자 상호작용 구현 기이 부족하다. 본 연구에서는 이러한 기능을 포함하는3차원 채팅시스템을 VRML과 Java를 이용하여 개발하였다. 다수 사용자 참여 기능은 Java를 이용하여 클라이언트/서버 시스템으로 구성하였으며 사용자 상호작용 기능은 3차원 가상공간을 걸어 다니는 효과 (walkthrough)를 제어하기 위한 인터페이스로서 EAI(External Authoring Interface)를 이용하여 구현하였다. 본 시스템에서 각 3차원 가상공간에서의 채팅 지원을 위해 여러개 서버를 둘 수 있도록 구성하여 사용자가 서버를 통해 채팅을 위한 가상공간을 추가 혹은 변경할 수 있도록 하였다.

• Journal of Korea Game Society
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• v.8 no.4
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• pp.87-93
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• 2008

The game engine has executed an application after making a mobile 3D game engine which is based on mobile 3D standard graphic API using openGL-ES so far. But, We could not do it satisfactorily that contents compatibility of various types as a various low-level's function is supported. At this point, This study introduce a mobile 3D game engine which is based on mobile 3D standard graphic API using JSR-184 that supporting a high-level's API more than openGL-ES and optimizing to Java environment on J2ME in the center of GSM phone. Also, We shows that the proposed skinned-mesh scheme for enhancing the process speed of a 3D object on JSR-184 engine. The experimental results are shown.

• Journal of Korea Multimedia Society
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• v.10 no.11
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• pp.1460-1471
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• 2007

A 3-Dimensional engine in a mobile embedded device is divided into a C-based OpenGL/ES and a Java-based JSR184 which interprets and executes a byte code in a real-time. In these two standards, the JSR184 supporting Java objects uses more processor resources than an OpenGL/ES and thus has a constraint when it is used in an embedded device with a limited computing power. On the other hand, 3-Dimensional contents employed in existing personal computer are created by utilizing advantages of Java and secured numerous users in European market, due to the good quality in contents and extensive service in a commercial network, GSM. Because of the reason, a mobile embedded device used in a GSM network needs a JSR184 which can provide an existing Java-based 3-Dimensional contents without extra conversion processes, but the current version of Java-based 3-Dimensional engine has drawbacks in application to commercial products because it requires more computing power than the mobile embedded device. This paper proposes a binding technique with the advantages of Java objects to improve a processing speed of 3-Dimensional contents in limited resources of a mobile embedded device. The technique supports a JSR184 standard interface in the upper layer to utilize 3-Dimensional contents using Java, employs a different code-conversion language, KNI(Kilo Native Interface), in the middle layer to interface between OpenGL/ES and JSR184, and embodies an OpenGL/ES standard in the lower layer. The validity of the binding technique is demonstrated through a simulator and a FPGA embedding an ARM.

• Journal of Korea Multimedia Society
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• v.8 no.3
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• pp.389-397
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• 2005

In this paper, we study the synchronization method of animated simulations and VRs for on-line virtual reality education system. To build the data of animated simulations and synchronization modules of VRML content, the media-synchronizing technology, HTML + TIME and scripts are used. The VRML control module ismade into Java applet using the Java EAI provided for the web and the interface for VRML contents. To control the animation of VRML contents, the node information is extracted, and an animation production template capable of controlling animation in inter-connection with VRML content is made. With evaluation of the animation control performance, processing speed, synchronization performance between media in the system built, more improved results are obtained. We would like to suggest a education system with easy system construction and various multi-medium applicability by realizing HTML + TIME media synchronization and VRML web 3D virtual reality creation techniques, and animated images and 3D animation controls according to time using Java through this study.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.4
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• pp.767-773
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• 2000

As computer systems and communication technologies develop rapidly, CSCW(Computer Supported Collaborative Work) system appears nowadays, through which it is available to work on virtual space without any restriction of time and place. Most of CWCS systems depend on a special network and groupware. The systems of graphics and CAD are not so many because they are specified by hardware and application software. In this paper, we propose a web-based collaborative CAD system, which can be jointly worked on Internet WWW being independent from any platforms. It can create and modify 3D objects easily using VRML and Java 3D API, and it can send, print, and store them. The interactive work for designing objects can be also carried out through chatting with each other. This system is executed in the environment of Client/server architecture. Clients connect to the CAD sewer through Java applet on WWW. The server is implemented by Java application, and it consists of three components : connection manager which controls the contact to users, work manager which keeps viewing in concurrency and provides virtual work space sharing with others, and solid modeler which creates 3D object.

• The Journal of Information Technology
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• v.4 no.4
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• pp.101-112
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• 2001

This paper aims at making cyber science museum construction. JAVA 3D and VR 3D which concentrate the scientific capacity and the technical capacity with the new technology of software, contribution of multimedia and educational data realized the Cyber Science Museum. So, It realized high level information service. It offered a user the educational data which has three dimension service of cyber space and useful science information. After all, It contributed to IT industry.