• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.423-425
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• 2019

Users may experience a sub-type of motion sickness, called cybersickness, when interacting with virtual reality (VR) applications in the state of wearing head mounted display (HMD) devices. Although the root cause of cybersickness is still unclear, it is believed to result from a sensory mismatch between visual and vestibular systems. However, there is a lack of studies developing data collection and analysis systems to measure cybersickness. In this paper, therefore, a system is designed that collects electroencephalography (EEG) and physiological data from a user wearing a VR HMD device through an internet of things (IoT) platform and decides whether a user experiences a symptom of cybersickness, namely dizziness, or not by using a decision threshold. Experimental results showed that the proposed system achieved about 92% accuracy of a dizziness detection when considering 14 participants.

• Journal of the Korea Society of Computer and Information
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• v.25 no.8
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• pp.23-30
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• 2020

As the 4th industrial revolution emerged, the latest technologies such as IoT, AI, Big data, AR/VR/XR are emerging. However, in the field of virtual reality (VR) technology platform services, there is no standardization and systematic support. In addition, various platform technologies related to virtual reality have been presented, making it difficult to select an API that should be selected for development. In this study, we analyzed the method for virtual reality development and the virtual reality (VR) technology that is being serviced by users. In addition, by presenting the advantages and disadvantages of each development platform, we intend to present a reference point for developers to select an efficient platform. In addition, it will help the developer to select an effective equipment and software platform in comparison with the advantages and disadvantages of various HMD devices used in virtual reality. The virtual reality (VR) development environment test used products from Oculus, and the software development environment was tested with two types: WebBased VR and HMD embedded.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.7
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• pp.1435-1440
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• 2017

Recently, VR and AR are emerging as an area of interest in ICT. In virtual reality to feel like a real, many people are looking for them because of its charm. However, the motion of the VR image and the moving object are not synchronized exactly, and a problem of feeling nausea is also occurring. The problem should be solved by the application of Attraction in the VR system. In this paper, we propose a module that minimizes delay time by synchronizing movement of VR image and moving object. The proposed module calculates the moving distance using the direction and the acceleration sensor that the user views through the VR device. The module proposed in this paper will pay attention to the fact that the movement of the attraction moves along a fixed path, so that the accurate travel distance can be calculated.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.400-403
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• 2018

The VR / AR market has grown significantly due to the development of Virtual Reality and Augmented Reality, the core technologies of the Fourth Industrial Revolution. According to a report released by the Korea Science and Engineering Corporation (KISTEP), the global VR / AR market will grow to $ 105 billion by 2022. An important key to the growth of the VR / AR market is user immersion. VR is dependent on technology of hardware such as display and sensor for biometric signal recognition. In order to improve user's immersion feeling, it is important to transmit sensor data to display device more accurately and quickly. In this paper, we consider various sensor hardware dependencies of VR, and compare various correction methods and filtering methods to lower the Motion to Photon (MTP) time that user movement is fully reflected on the display using sensor devices.

• Journal of the Korean Chemical Society
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• v.66 no.4
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• pp.323-332
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• 2022

The purpose of this study is to investigate the effects of science classes using smart devices that combine augmented reality (AR) and virtual reality (VR) on the scientific attitude of middle school gifted students. In addition, it is intended to find out the perception of science classes using these smart devices. In addition to actual experiments, a science class program that allows students to experience science experiments virtually using AR and VR was applied to 15 middle school gifted students. Before and after the application of the program, the questionnaire is to investigate the interest in scientific classes, the attitude toward science exploration, and the professional interest in science, and the recognition of classes that combine AR and VR. In addition, through in-depth interviews, the perceptions of gifted students was accurately investigated. As a result of this study, the content of science classes and instructors showed high class satisfaction, but the smart devices and applications used during the science classes showed lower class satisfaction than others. As a result of comparing and analyzing the pre-post of gifted students, interest in science class, attitude toward science inquiry, and professional interest in science increased significantly among the sub-areas of the scientific attitude test. As a result of analyzing free responses and indepth interviews, gifted students responded with the advantage that classes using smart devices that combine AR and VR can be tested quickly and safely for a short time compared to actual experiments. On the other hand, they responded with low completeness of the application and dizziness when operating virtual reality. Based on this, implications for the development of applications and instructional programs using advanced technologies that can experience realistically limited scientific experiments such as experimental preparation, class time, and risk factors were obtained.

• Journal of Korea Game Society
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• v.17 no.6
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• pp.19-28
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• 2017

There exist a variety of VR(Virtual Reality) contents that have been developed by the use of the latest VR technologies. Unlike the rapid advances in the recent VR devices however, the development of VR based game contents that fully utilize such cutting-edge devices has been lackluster. Using more accessible form of smartphone-based HMDs(Head-Mounted Displays), we compare two popular VR presentation methods(a realistic 3D VR karaoke room and a 360 degree video karaoke room) and analyze their users' immersion and realistic perception. We expect that our study can be utilized as a supporting guideline for future smartphone-based VR content developments.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.1123-1126
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• 2017

최근 성인들 중에서도 취미로 가지고 노는 장난감 즉 '키덜트 장난감'의 관심도가 증가하는 추세이다. 그 중에서도 높은 매출 상승세를 보이는 RC카와 VR은 지속적으로 시장규모를 성장시키기 위해서 추가적인 콘텐츠가 필요하다고 판단된다. 그러므로 본 프로젝트는 두 아이템을 융합하여 차별적 콘텐츠가 있는 RC카 개발을 목표로 한다. VR기기 영상을 보면서 컨트롤러로 RC카를 조종하는 구성이며, 특징적인 콘텐츠로는 OpenCV 컴퓨터비전 알고리즘을 활용하여, 트랙내의 차선, 표지판 등을 인식하고 안전주행 점수를 평가하는 Score모드가 있다. 결론적으로 RC카와 VR을 동시 활용하는 것이 특징인 본 프로젝트는 높은 H/W 독립성, 확장성을 가지며, S/W적으로는 혼합현실적 요소를 체험할 수 있다. 나아가 사회적인 의미로 여러 세대가 함께하는 유익한 놀이 콘텐츠의 활성화를 기대할 수 있다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• fall
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• pp.117-119
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• 2021

본 논문에서는 VR 기반 원격 회의 어플리케이션에서 높은 사용자의 몰입도를 제공하기 위한 상호작용 기능들을 제안한다. 우선, 향기 효과를 구성하여 감각 효과 제공을 통한 상호작용 방법을 제안한다. 다음으로 이모티콘과 아바타의 애니메이션을 통해 다양한 감정적 상호작용을 제안한다. 마지막으로 다수 사용자의 원활한 음성 커뮤니케이션을 위한 테이블 별 음성 채널 분리를 기능을 제안한다. 본 어플리케이션은 Oculus Quest 2 기기를 통하여 VR 환경에서 구현되었다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2021.06a
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• pp.173-175
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• 2021

최근 코로나시대의 비대면적 사회환경에서 원격 회의 요구가 증가하고 있다. 기존의 비대면 환경에서의 회의나 강의 어플리케이션에서 회의 참가자의 참여도와 몰입도를 향상시키기 위해 본 논문에서는 VR 기술을 기반으로 한 원격 회의, 강의 어플리케이션을 제안하였다. 본 논문의 어플리케이션은 양방향통신방식으로 설계 및 구성되었으며, Unity 프로그램을 사용하여 어플리케이션을 제작하고 사용자는 Oculus2 기기를 통하여 VR 환경의 어플리케이션을 실행하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.800-802
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• 2022

최근 성인들을 위한 '키덜트 장난감'의 관심도가 증가하고 있다. 그중 높은 매출을 보이는 RC 카와 VR 의 콘텐츠 부족 및 대중화 문제를 해결하면 시장규모를 성장시킬 수 있다고 판단한다. 본 논문은 차별화된 RC 카 레이싱 게임 개발을 목표로 한다. 스마트폰용 VR 기기를 착용해 영상을 보며 컨트롤러로 RC 카를 조종한다. 또한 실시간 객체 검출이 가능한 YOLOv5 를 활용해 표지판 인식 및 바운딩 박스, 표지판 라벨, 라벨 음성 출력 기능과 오픈 소스 기반 실시간 컴퓨터 비전인 OpenCV 기반 알고리즘을 활용하여 차선을 인식해 이를 기반으로 영상 처리를 거쳐 가상 차선 및 가상 트랙을 출력한다. 결론적으로 RC 카와 VR 로 구현하여 이를 통해 부족한 VR 컨텐츠를 추가하고 접근성을 강화한다.