• 한국CDE학회논문집
• /
• 제6권2호
• /
• pp.140-146
• /
• 2001

A nuclear Power Plant is composed of a number of mechanical components. Maintaining the integrity of these components is one of the most critical issues in nuclear industry. In order to evaluate the integrity of these mechanical components, a lot of data are required including inspection data, geometrical data, material properties, etc. Therefore, an effective database system is essential to manage the integrity of nuclear power plant. For this purpose, an internet based virtual reality environment and web database system was proposed. The developed virtual reality environment provides realistic geometrical configurations of mechanical components using VRML (Virtual Reality Modeling Language). The virtual reality environment was linked with the web database, which can manage the required data for the integrity evaluation. The proposed system is able to share the information regarding the integrity evaluation through internet, and thus, will be suitable for an integrated system for the maintenance of mechanical components.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2000년도 추계종합학술대회 논문집(3)
• /
• pp.193-196
• /
• 2000

In this paper, we present a model based 3d facial modeling method for virtual reality application using only one front of face photography. We extract facial feature using facial photography and modify mesh of the basic 3D model by the facial feature. After this , We use texture mapping for more similarity. By experiment, we know that the modeling technic is useful method for Movie, Virtual Reality Application, Game , Clothing Industry , 3D Video Conference.

• 산업공학
• /
• 제16권2호
• /
• pp.258-267
• /
• 2003

Recently, virtual reality technologies have been rapidly developed and realtime virtual simulation methods have been extensively employed for several application areas such as game, sports, manufacturing, military, and so on. A 3D database in realtime virtual simulation plays a key role because it makes users feel reality in virtual space. In a application view of 3D database, a systematic construction approach is required to reduce its construction time and increase its quality. However, many researches have been mostly focused on realtime graphic issues and its key technologies. In virtual simulation of transportation equipments, this paper proposes a systematic construction process of 3D database consisting of four stages as follows: 1) determine the activity space of a equipment, 2) collect data related to 3D database construction, 3) make a 3-dimensional modeling strategy, and 4) generate and evaluate a 3D model. This paper also introduces a new procedure of 3D environment modeling, which summarizes and expands our modeling experiences, to be used as a modeling guide.

• 한국BIM학회 논문집
• /
• 제9권4호
• /
• pp.1-9
• /
• 2019

Visualized information platforms through building information modeling (BIM) such as virtual reality (VR) and augmented reality (AR) improves the efficiency of architectural information exchange. Despite that, less effort has been directed to evaluate the effectiveness of different BIM visualization platforms for architectural design review. This study fills these gaps and compares three BIM visualization tools for reviewing diverse architectural review factors and technology acceptance degree. Three main BIM visualization tools, which are desktop-based, virtual reality-based and augmented reality-based, were employed and different architectural review factors and user's technology acceptance degree was measured. As a result, VR and AR environment showed better visual presentation than desktop environment during design review. In terms of the technology acceptance level, VR and AR environments have received higher ratings compared to desktop environments. The detailed findings provide guidelines for participants and researchers involved in design review process to selectively adopt VR and AR system to various architectural design review components.

• 수산해양교육연구
• /
• 제17권3호
• /
• pp.427-433
• /
• 2005

The study of Web GUI(Graphic User Information) system for Virtual Reality System is mainly performed on effective methodology which transform real world data to computing world data. MGIS(Marine Geographic Information System) has its own target on reliable data service by acquisition of geometric information using accurate measurement and graphical visualization. This type of raw data visualization can be built without software tools, yet is incredibly useful for interpreting and communicating data. Even simple visualizations can aid in the interpretation of complex 3D relationships that are frequently encountered in the geosciences. The Virtual Reality Modeling Language provides an easy way for geoscientists to construct complex visualizations that can be viewed with free software. This study propose a three dimensional Web GUI system using MGIS-based three dimensional data models and virtual imaging system. Finally, we design a Web GUI system integrating above data models.

• 한국전자통신학회논문지
• /
• 제17권6호
• /
• pp.1167-1174
• /
• 2022

본 연구에서는 실제문제 해결을 위한 가상현실 모델링에서 물리적 형태를 전자적으로 모사하는 것 뿐 아니라 모사의 대상이 되는 객체와 사용자의 상호관계까지 다루어야 한다고 보았다. 이를 위하여 실제공간에서 일어나는 사용자와 공간의 상호작용 요소를 가상현실 적용에 추가하는 방안을 제안하였다. 본 연구는 공중화장실의 안전문제 해결을 위한 가상현실 모델링을 배경으로 하는데, 가상현실 모델링에 사용자와의 상호작용 요소를 추가하기 위하여 합리적인 원칙이 있어야 한다고 보고 범죄예방을 위한 환경설계 기본전략을 활용하였다. 공중화장실 위험도 평가를 위한 가상현실 모델을 구축하기 위하여 자연 감시, 영역성 강화, 활동 활성화, 유지관리를 기준으로 공중화장실과 사용자간의 상호작용요소를 도출하였다. 또한, 도출한 상호작용요소의 타당성을 검증하고자 전문가의 의견과 각 요소에 대하여 산출한 위험도와 비교하였다. 그 결과, 범죄예방을 위한 환경설계 기본 전략과 같이 일정한 원칙에 따라 상호작용 요소를 도출한 것이 타당성 있음을 보였다.

• 대한기계학회논문집A
• /
• 제28권8호
• /
• pp.1116-1124
• /
• 2004

In these days, a vehicle simulator has been developed with a VR(Virtual Reality) system. A VR system must provide a vehicle simulator with natural interaction, sufficient immersion and realistic images. In addition, a VR system must present a driver with the realistic driving situation. To achieve these, it is important to obtain a fast and uniform rendering performance regardless of the complexity of virtual worlds. In this paper, the factors to improve the reality for the VR based vehicle simulator have been investigated. For the purpose, the modeling and the rendering methods which offer an improved performance for complex VR applications as the 3D road model have been implemented and verified. Then, we experiment on the influence of graphic and sound factors to the driver, and analyze each result for improving the reality such as the driver's viewport, the form of texture, the lateral distance of the side object, and the sound effect. These factors are evaluated on the driving system which is constructed for qualitative analysis. The research results could be used for improving the reality of the VR based vehicle simulator.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2008년도 하계종합학술대회
• /
• pp.1019-1020
• /
• 2008

This paper presents to reduce distinction between the real world and the virtual world using high-quality objects in Augmented Reality(AR). To make high-quality objects, using 3D studio max, VRML(Virtual Reality Modeling Language) and Artoolkit.

• 한국전자통신학회논문지
• /
• 제15권5호
• /
• pp.939-948
• /
• 2020

가상현실 기술을 농업 기술 교육에 접목하려는 많은 노력이 이루어지고 있으며, 농기계 교육과 같은 직접적인 교육뿐만 아니라 게임을 이용한 간접 교육에도 관심이 증가하고 있다. 가상현실에서 핵심적인 기술은 사용자가 실제와 같이 느낄 수 있게 대상을 모델링하는 것이다. 농장에서 재배하는 농작물은 농장의 환경에 따라 동일한 영향을 받는다. 또한, 농작물은 각각 독립적인 특성도 가지게 된다. 본 논문에서는 농작물 모델링의 이러한 특성을 반영하여 NPC 형태로 모델링하는 방법을 제안한다. 제안하는 방법에서는 개별 농작물이 날씨와 농장의 특성을 반영하는 방법과 독립적인 특성을 반영하는 방법을 구현한다. 구현 결과는 제안하는 방법이 간단한 알고리즘을 사용하지만 농작물을 매우 사실적으로 표현하는 것을 보여준다.

• 국제학술발표논문집
• /
• The 9th International Conference on Construction Engineering and Project Management
• /
• pp.1075-1084
• /
• 2022

The use of Hi-Tech in cultural heritage preservation and the promotion of cultural heritage values in general, particularly artifacts, opens new opportunities for attracting tourists while also posing a challenge due to the need to reward high-quality excursions to visitors historical and cultural values. Building Information Modeling (BIM) and Hi-Tech in new building management have been widely adopted in the construction industry; however, Historic Building Information Modeling (HBIM) is an exciting challenge in 3D modeling and building management. For those reasons, the Scan-to-HBIM approach involves generating an HBIM model for existing buildings from the point cloud data collected by Terrestrial 3D Laser Scanner integrated with Virtual Reality (VR), Augmented Reality (AR), contributes to spatial historic sites simulation for virtual experiences. Therefore, this study aims to (1) generate the application of Virtual Reality, Augmented Reality to Historic Building Information Modeling - based workflows in a case study which is a monument in the city; (2) evaluate the application of these technologies to improve awareness of visitors related to the promotion of historical values by surveying the experience before and after using this application. The findings shed light on the barriers that prevent users from utilizing technologies and problem-solving solutions. According to the survey results, after experiencing virtual tours through applications and video explanations, participant's perception of the case study improved. When combined with emerging Hi-Tech and immersive interactive games, the Historic Building Information Modeling helps increase information transmission to improve visitor awareness and promote heritage values.