• KSII Transactions on Internet and Information Systems (TIIS)
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• 제3권1호
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• pp.108-118
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• 2009

In this paper we develop an indoor location tracking system and its 3D tracking monitoring viewer, viz., 3D Navigation Viewer (3DNV). We focus on the integration of an indoor location tracking system with the Virtual Reality Modeling Language (VRML), to facilitate a representation of the user's spatial information in virtual indoor environments that is synchronized with the physical location environment. The developed indoor location tracking system employs beacons as active transmitters, and a listener as a passive receiver. The distance information calculated from the difference speeds of RF and Ultrasonic signals is exploited, to determine the user's physical location. This is essential in supporting third parties like doctors and caregivers in identifying the activities and status of a particular individual via 3DNV. 3DNV serves as a unified user interface for an indoor location tracking system, showing the viewpoint and position of the target in virtual indoor environments. It was implemented using VRML, to provide an actual real time visualization of the target's spatial information.

• 한국CDE학회논문집
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• 제13권6호
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• pp.429-439
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• 2008

With a remote operated manipulator system, the situation at a remote site can be rendered through remote visualized image to the operator. Then the operator can quickly realize situations and control the slave manipulator by operating a master input device based on the information of the virtual image. In this study, the remote operator visual support system (ROVSS) was developed for viewing support of a remote operator to perform the remote task effectively. A visual support model based on virtual environment was also inserted and used to fulfill the need of this study. The framework for the system was created by Windows API based on PC and the library of 3D graphic simulation tool such as ENVISION. To realize this system, an operation test environment for a limited operating site was constructed by using experimental robot operation. A 3D virtual environment was designed to provide accurate information about the rotation of robot manipulator, the location and distance of operation tool through the real time synchronization. In order to show the efficiency of the visual support, we conducted the experiments by four methods such as the direct view, the camera view, the virtual view and camera view plus virtual view. The experimental results show that the method of camera view plus virtual view has about 30% more efficiency than the method of camera view.

• 복식문화연구
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• 제23권4호
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• pp.616-627
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• 2015

The purpose of this study was to develop slacks patterns for obese-schoolgirls aged 10~12 by using a 3D virtual garment simulation system. The criteria for subjects in this study were girls who had a BMI of over $25kg/m^2$. A total of 155 schoolgirls who met these criteria were enrolled. The results were as follows: First, by using 3D virtual garment simulation, a new slacks pattern considerate of obese-schoolgirls was developed. The basic numerical formulae were as follows: Front and back hip girth of H/4-0.5+1 and H/4+0.5+1.5, front waist girth of W/4+1+0.5, back waist girth of W/4+2+0.5, front crotch extension of H/16-0.5, back crotch extension of H/8-0.5, front dart amount of 1, and back dart amount of 2. Second, according to the new slacks pattern appearance evaluation, the new slacks pattern scored more highly than the existing pattern for silhouette and ease amount, confirming that the new slacks pattern is appropriate for obese-schoolgirls. Additionally, the new slacks pattern was evaluated allowing for the proper space length of the waist, abdomen and hips. This study is expected to serve as important basic data for ensuing studies that may utilize a 3D virtual garment simulation system with 2D patterns and for future 3D pattern production program development.

• 해양환경안전학회지
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• 제6권1호
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• pp.1-9
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• 2000

The paper describes system design of next-generation Ship Simulator using Virtual Reality (VRSS), well known as human-computer interaction. VRSS system is required to have special condition that comprises multiple user participants such as captain, officer, pilot, and quartermaster. To cope with that condition, core technologies were explored and proposed multi-networking system with broker server. The evaluation of the proposed system was done with PC-based immersion-type VR device, constituted with HMD (Head Mounted Display), Head Tracking Sensor, Puck, Headphone, and Microphone. Using the VR device, assessment test was carried out in a virtual bridge with 3D objects, which are created by VRML (Virtual Reality Model Language) program. As results of tests, it is shown that the cybernetic 3D objects were act as if real things in a real ship's bridge. Therefore, interesting interaction with participants can be obtained in the system, Thus, we found that the proposed system architecture can be applicable to VRSS system construction.

• Journal of Information Technology Applications and Management
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• 제28권3호
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• pp.59-75
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• 2021

This study aims to establish a foundation for autonomous driving on campus and communication of abundant university information in the HCI environment in a VR environment where college freshmen can freely travel around campus facilities. The purpose of this study is to develop a three-dimensional VR-style campus tour system to establish a media environment to provide abundant university information guidance services to freshmen in non-face-to-face situations. This study designed a three-dimensional virtual reality campus tour system to solve the problem of discontinuity in which VR360 filming space does not lead to space like reality, and to solve many problems of expertise in VR technology by constructing an integrated production environment of tour system. We aim to solve the problem of inefficiency, which requires a large amount of momentum in virtual space, by constructing a GUI that utilizes the motion of the field of view focus. The campus environment was designed as a three-dimensional virtual reality using a three-dimensional graphic design. In non-face-to-face situations, college freshmen freely transformed the HMD VR device, smartphone, FPS operation mode of the gyroscope sensor. The design elements of the three-dimensional virtual reality campus tour system were classified as ①Visualization of factual experiences, ②Continuity of space movement, ③Operation, automatic operation mode, ④Natural landscape animation, ⑤Animation according to wind direction, ⑥Actual space movement mode, ⑦Informatization of spatial understanding, ⑧GUI by experience environment, ⑨Text GUI by building, ⑩VR360, 3D360 Studio Environment, ⑪Three-dimensional virtual space coupling block module, ⑫3D360-3D Virtual Space Transmedia Zone, ⑬Transformable GUI(VR Device Dual Viewer-Gyro Sensor Full Viewer-FPS Operation Viewer) and an integrated production environment was established with each element. It is launched online (http://vautu.com/u1) by constructing a GUI for free driving mode and college information screens to adapt to college life for freshmen, and designing an environment that can be used simultaneously by current media such as PCs, Android, and iPads. Therefore, it conducted user research, held a development presentation, a forum on excellence in university innovation support projects, and applied it as a system on the website of a particular university. College freshmen will be able to experience university information directly from the web and app to the virtual reality campus environment.

• 대한음성학회:학술대회논문집
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• 대한음성학회 2006년도 추계학술대회 발표논문집
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• pp.113-116
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• 2006

In this paper, we first implement an audio playback system for virtual reality by providing 3D audio effects to listeners. In general, such a 3D audio playback system utilizes a sound localization technique using head related transfer function (HRTF) to generate 3D audio effect. However, the 3D audio effect is degraded due to the crosstalk in the stereo loudspeaker environment. To enhance the 3D sound effect, we implement the crosstalk cancellation technique proposed by Atal and Schroeder and apply it to the 3D audio system.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1999년도 전력전자학술대회 논문집
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• pp.71-75
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• 1999

In this paper, we present the 3DOF force-reflecting interface which allows to acquire force of object within a virtual environment. This system is composed of device, virtual environment model, and force-reflecting rendering algorithm. We design a 3 DOF force-reflecting device using the parallel linkage, torque shared by wire, and the controller of system applied by impedance control algorithm. The force-reflecting behaviour implemented as a function position is equivalent to controlling the mechanical impedance felt by the user. Especially how force should be supplied to user, we know using a God-Object algorithm. As we experiment a system implemented by the interface of 3D virtual object and 3DOF force-reflecting interface, we can feel a contact, non-contact of 3D virtual object surface and sensing of push button model.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2000년도 전력전자학술대회 논문집
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• pp.452-455
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• 2000

본 논문에서는 현재 수행중인 가상현실 기술을 이용한 컴퓨터 지원 교육훈력 시스템(CATS : Computer Assister Training System) 개념 설계를 바탕으로 발전소 3D 그래픽 모델을 작성하고 가상현실도구를 사용하여 정보의 변경 및 가공처리로 가상발전소(Virtual Plant) 및 가상판넬(Virtual Panel)상세설계 및 구현결과에 대해 서술한다. 이를 통해 발전소 주요계통 설비 및 발전소 본관 내부의 주요기기 등을 Navigation 할수 있고 이에 대한 엔지니어링 데이터베이스 환경을 작성하여 추후 정확하고 신속한 계통 설비 및 주요기기 정보를 얻을수 있도록 하였으며 가상판넬(Virtual Pannel)을 만들어 학생들이 시뮬레이터실로 가지 않고 MCR(Main Control Room)에서 발전소를 운전하는 것과 같은 효과를 강의실에서 얻을 수 있다.

• 한국정보전자통신기술학회논문지
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• 제15권4호
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• pp.271-282
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• 2022

본 논문에서는 디지털 휴먼 컨텐츠 생성 시스템을 제안한다. 디지털 휴먼 컨텐츠 생성 시스템은 전신 스케닝을 통해 3D AI 모델링 작업을 하고, 3D 모델링 후처리와 텍스쳐링, 리깅 작업으로 제작된다. 이를 가상현실 컨텐츠 정보와 결합함으로써 가상현실 내에서 가상 모델의 자연스러운 동작이 이뤄질 수 있고, 하나의 시스템에서 효율적으로 디지털 휴먼 컨텐츠를 생성할 수 있다. 따라서 자원을 최소화하는 가상현실 기반의 디지털 휴먼 컨텐츠 생성이 가능하도록 하는 효과가 있다. 또한 사람에 의한 3D 모델링 및 텍스쳐링 작업은 전처리 과정을 필요로 하지 않는 자동화된 전처리 공정을 제공하며, 다양한 디지털 휴먼 컨텐츠를 효율적으로 관리하는 기술을 제공고자 한다. 특히 가상 모델을 구성하기 위한 3D 모델링 및 텍스쳐링 등의 전처리 공정은 인공지능에 의해 자동으로 수행되도록 함으로써 신속하고 효율적인 가상 모델 구성이 이뤄질 수 있다는 장점이 있다. 또한 시그니처 모션을 통해 디지털 휴먼 컨텐츠 구성 및 관리가 용이하게 이뤄질 수 있다는 장점이 있다.

• 한국컴퓨터그래픽스학회논문지
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• 제15권2호
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• pp.1-8
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• 2009

본 논문에서는 사용자가 입력한 사람의 신체 모델과 모델에 입혀질 옷의 두 이미지를 입력으로 하여 2D상에서 옷과 모델이 잘 어울리게 입혀지는 가상의 드레스 업(Dress up)시스템을 제안한다. 첫 번째 단계에서는 골격 구조의 조인트 정보를 이용하여 옷 이미지를 크게 변형시킨다. 다음으로 옷의 경계에 있는 점들을 샘플링 하여 모델의 경계에 있는 점과 매칭 시키고 그 점들을 이용해 최적화 단계를 거쳐 최종적인 피팅 결과를 도출해 낸다. 두 단계를 거쳐 피팅 된 옷의 경우 평면적으로 보이기 때문에 부자연스러운 결과를 보이게 되므로 자연스러운 렌더링 결과를 위해서 이를 3D로 재구성 (reconstruction)시킨다. 재구성된 3D구조로부터 쉐이딩 정보를 가져와 다시 2D상에서 렌더링을 함으로써 최종적인 결과를 도출하게 된다. 본 연구에서 제안된 시스템을 통해 2D 기반의 가상 옷 시뮬레이션 결과를 얻을 수 있게된다.