• Journal of the Korea Computer Graphics Society
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• v.30 no.1
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• pp.1-10
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• 2024

In immersive virtual environments including mixed reality (MR) and virtual reality (VR), avatars or agents, which are virtual humans, are being studied and applied in various ways as factors that increase users' social presence. Recently, studies are being conducted to apply generative AI as an agent to improve user learning effects or suggest a collaborative environment in an immersive virtual environment. This study proposes a novel method for interface application of a virtual assistant agent (VAA) using OpenAI's ChatGPT in an immersive virtual environment including VR and MR. The proposed method consists of an information agent that responds to user queries and a control agent that controls virtual objects and environments according to user needs. We set up a development environment that integrates the Unity 3D engine, OpenAI, and packages and development tools for user participation in MR and VR. Additionally, we set up a workflow that leads from voice input to the creation of a question query to an answer query, or a control request query to a control script. Based on this, MR and VR experience environments were produced, and experiments to confirm the performance of VAA were divided into response time of information agent and accuracy of control agent. It was confirmed that the interface application of the proposed VAA can increase efficiency in simple and repetitive tasks along with user-friendly features. We present a novel direction for the interface application of an immersive virtual environment through the proposed VAA and clarify the discovered problems and limitations so far.

• Proceedings of the IEEK Conference
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• 2001.09a
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• pp.173-176
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• 2001

하드웨어 성능 및 소프트웨어 기술에 힘입어 컴퓨터 애니메이션 기술은 발전을 거듭하고 있으며, 영화와 게임산업으로부터 군사훈련에 이르기까지 다양한 응용분야에서 이용되고 있다.[1][2] 개발된 3D 애니메이션 엔진은 구조화된 클래스들로 되어있기 때문에 클래스의 가감이 용이하다. 또한 모션 데이터 로더와 캐릭터 로더가 포함되어 있고, 스킬(skill)간의 전이와 섞음이 가능하다. 그러므로 애니메이션 엔진을 이용하여 캡쳐된 모션데이터를 게임에 적용하기 쉬울 뿐만 아니라 다양한 가상환경에서 이용되리라 기대된다.

• The Journal of the Korea Contents Association
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• v.18 no.7
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• pp.165-176
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• 2018

With the development of information and communication technology, the possibility of utilizing 3D virtual reality in education has been sought. Especially, the screen composition in the virtual reality has the possibility of inducing the emotion of the user which may affect the learning. However, there is little research on what aspects of the screen can cause emotions. The purpose of this study is to analyze the user's perception of screen components inducing emotion in virtual reality learning environment. Using Multi Dimensional Scaling (MDS), the user's perception of the main screen in a representative virtual reality learning environment platform was investigated. As a result, the dimension of depth on the screen and the dynamics of the avatar related to the movement were confirmed. This study is meaningful to explore technical variables that can induce emotions among screen elements in virtual reality contents.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.131-132
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• 2018

본 프로젝트는 Unity3D Tool 기반의 가상 체험용 VR 프로젝트를 설계하고 개발하였다. 프로젝트의 핵심 기능 및 환경은 게임 제작용 툴인 Unity를 사용하여 웹과 모바일 앱에서 다양하게 접근할 수 있도록 제작하였다. 웹에서는 키보드와 마우스로 제어하고 모바일 앱에서는 자체 컨트롤러 기능을 활용하여 이동 및 제어 처리하였다. 그리고 VR 장치를 활용한 앱 컨트롤러는 시선으로 제어 할 수 있도록 하였다. 프로젝트 활용환경의 공통적인 기능으로는 화면 중앙에 위치한 이동 포인터를 액션 이미지에 일정 시간 올려놓으면 이벤트가 발생하는 레이케스트 기능을 사용하였다. 건물 내부를 표현한 파노라마 이미지는 해당하는 각 장소마다 360' 카메라를 사용하여 촬영하여 기능을 구현하였다. 본 프로젝트는 다양한 네트워크 및 컴퓨팅 환경에서 활용할 수 있는 가상 체험 프로젝트이다. 가상 체험을 통해 가상공간에서 거리, 공간, 시간에 구애받지 않고 학교 소개 및 홍보를 위한 마케팅 효과를 가질 것이다.

• Journal of the Korea Computer Graphics Society
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• v.2 no.2
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• pp.37-44
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• 1996

Networked virtual reality systems provide a consistent virtual world to the users, possibly distributed across long distances, and have been widely applied in the military, entertainment, and architectural areas. Large processing requirements, however, made these systems be mainly researched on the platforms of high-performance graphics workstations. This paper presents several problems when networked virtual reality systems are implemented on commodity PCs: two problems related with 3D graphical processing, and the other related with network bandwidth and transmission delay. We also suggest solutions to these problems and analyze their performance effect based on an architectural simulation application.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11b
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• pp.675-680
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• 2003

현재 인터넷상에서 서비스되고 있는 컨텐츠는 업그레이드되어 3차원 가상기법인 Web 3D 기술을 적용한 사실적이며 현실감 있는 환경에서 상호작용이 가능한 컨텐츠로 전환되고 있다. 이에 Web 3D의 시장에 많은 저작도구들이 개발되고 활용되고 있다. VRML를 기반으로 하는 표준 기술과 특정분야에 활용될 수 있게 개발된 비표준 기술들로 발전하고 있는 환경에서 Web 3D 컨텐츠 구축을 위한 저작도구의 분석은 필연적이라 생각된다. Web 3D 저작도구의 기본 기능과 확장성, 호환성, 적용분야를 비교 분석하여 각 활용분야와 체형에 맞는 저작도구의 선택을 통한 컨텐츠 제작 효율의 극대화를 제안한다.

• Proceedings of the Korea Multimedia Society Conference
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• 1998.10a
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• pp.161-167
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• 1998

오늘날 네트워크 기술의 발전과 인터넷 보급이 대중화됨에 따라, 가상현실 기술로 구축된 인터넷상의 가상공간에 3차원 가상현실 기술을 접목하므로서, 가상현실이 제공하는 몰입감과 임장감을 체험하고 원거리의 네티즌과 동일한 가상환경을 공유하면서 상대방의 움직임과 동적 위치를 확인하고 의사 전달을 수행하고자 하는 요구가 발생하고 있다. 현재의 인터넷상에서의 웹은 HTML문서에 기반을 둔 정적인 2차원의 정보만을 제공하고 있다. 그러나 이러한 2차원의 인터넷에서도 3차원 정보를 표현할 수 있는 수단을 제공하는 VRML이 등장하였다. 이에 본 논문에서는 이 언어로 표현된 3차원 가상공간에서의 사용자간 이벤트를 중계하는 이벤트 중계 서버와 중계 서버들을 관리하는 위치 서버, 그리고 이들 서버와 통신하는 클라이언트와 인터넷상의 다른 세계를 관리할 수 있는 모듈을 설계하고 구현하였다. 또한 이를 통하여 가상공간에 참여하는 사용자를 나타내는 분신인 아바타를 통하여 각자의 가상공간을 체험하고 다른 참여자와 대화할 수 있는 시스템을 구현하였다.

• Archives of design research
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• v.19 no.4 s.66
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• pp.71-80
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• 2006

Collaboration has become essential in the product design process due to internationalized and specialized business environments. This study presents a real-time collaborative 3D design workspace for distributed designers, focusing on the development and the evaluation of new interaction techniques supporting nonverbal communication such as awareness of participants, shared manipulation and tele-presence. Requirements were identified in terms of shared objects, shared workspaces and awareness through literature reviews and an observational study. An Augmented Reality based collaborative design workspace was developed, in which two main interaction techniques, Turn-table and Virtual Shadow, were incorporated to support shared manipulation and tele-presence. Turn-table provides intuitive shared manipulation of 3D models and physical cues for awareness of remote participants. Virtual shadow supports natural and continuous awareness of location, gestures and pointing of partners. A lab-based evaluation was conducted and the results showed that interaction techniques effectively supported awareness of general pointing and facilitated discussion in 3D model reviews. The workspace and the interaction techniques can facilitate more natural communication and increase the efficiency of collaboration on virtual 3D models between distributed participants (designer-designer, engineer, or modeler) in collaborative design environments.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.12
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• pp.1249-1253
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• 2010

As personal computers have been recently improved in performance, the multi tasking of running several applications at the same time has been generalized. Since only one task space is provided for performing such tasks on Windows operating system, a number of computer users feel inconvenient. In this paper, we propose a 3D Virtual Desktop System which can show a process of switching task spaces in 3D motion using DirectX. The proposed system can provide a computer user with more task spaces and the intuitive UI(User Interlace) such as Compiz of Linux.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.11
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• pp.1317-1322
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• 2014

To complete an image, it is needed to go through the process to capture the actual actor's motion and compose it with virtual environment. Due to the excessive cost for production or lack of post-processing technology, however, it is mostly conducted by manual labor. The actor plays his role depending on his own imagination at the virtual chromakey studio, and at that time, he has to move considering the possible collision with or reaction to an object that does not exist. And in the process of composition applying CG, when the actor's motion does not go with the virtual environment, the original image may have to be discarded and it is necessary to remake the film. The current study suggested and realized depth-based real-time 3D virtual image composition system to reduce the ratio of remaking the film, shorten the production time, and lower the production cost. As it is possible to figure out the mutual collision or reaction by composing the virtual background, 3D model, and the actual actor in real time at the site of filming, the actor's wrong position or acting can be corrected right there instantly.