• Journal of the Korea Convergence Society
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• v.9 no.1
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• pp.317-323
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• 2018

Although various kinds of VR services are being carried out in the tourism field, The virtual reality experiences are still costly, since they could be realized in a limited space with some kinds of expensive equipment such as HMD. In this study, we propose a mobile virtual reality tourism experience using an easy and simple Google card board and user's smartphone because most tourist sites are outdoors and most of users like enjoying sightseeing and experience at the same time. For this purpose, we constructed a system that provides tourist information in real time employing both the IoT and VR techniques. Especially we develpoed a tourism contents for the UNESCO World Heritage Communities of Baekje Historical Site and Songsanri Tumulus. In addition, we virtually restored the royal palace in Gongju and confirmed the historical experience by VR flatform could be popular with people.

• The Journal of the Korea Contents Association
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• v.16 no.9
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• pp.739-750
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• 2016

The most of virtual reality headset have the separated controllers while they put on the headset; so the users may feel the discomfort and burden for the operation. In this paper, a novel virtual reality headset system using the EOG (electro-oculogram) is proposed and it has a distinguished feature that the user does not need to control the virtual reality headset by the hands, but the displayed contents are controllable by the electrical activity of the user's brain. The proposed system consist of the mobile device, a virtual reality headset, and an EOG headset for data acquisition. The system is implemented by using the Unity3D engine for the signal processing and controller, and the concept is confirmed through the implementation that it is more interesting and easier to control the virtual reality headset.

• Journal of Korea Multimedia Society
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• v.11 no.2
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• pp.228-236
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• 2008

Recently augmented reality technology has been researched to view the virtual shape of buildings before construction or cultural heritages under recovery. Those researches used special devices or markers that are not applicable in long distanced outdoor environment. Also the server had to compute a lot of transformations for the location changes of virtual objects. This paper proposed a mobile augmented reality system that uses GPS and accelerometer sensors in order to compute the virtual object's locations without using markers. The server determines the position and orientation by comparing the GPS data obtained from the client with the predefined 3D object informations in the server. If the server sends the virtual object informations such as the position, orientation and matching information, then the client matches the virtual object on the screen of mobile camera phone. In addition, the client computes the transformations of location change detected by the accelerometer derived from the user's movement without additional connection to the server.

• The Journal of the Korea Contents Association
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• v.19 no.7
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• pp.393-401
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• 2019

In this study, based on the general reasoning that the higher the resolution of the HMD, the greater the presence and immersion of the audience and the greater the presence experience, the difference in the presence experience according to the resolution of the virtual reality device is verified empirically Presence effect. To do this, 300 college students were included in the population, and VR simulations of the Oculus store were conducted using HMD and mobile devices with different resolutions (HD, FHD, WQHD) as stimuli. As a result, there was a significant difference in the presence experience of the audience according to the resolution of the mobile device attached to the virtual reality HMD, and the presence effect had a significant influence on the awakening. On the other hand, no significant influence was found in the effect of emotion. Therefore, we can prove a general reasoning hypothesis that the higher the resolution of the virtual reality device, the greater the presence experience of the audience. However, since the confounding effect and the impression are contradictory in the presence effect side, additional experiments research is required.

• Electronics and Telecommunications Trends
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• v.22 no.4 s.106
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• pp.96-108
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• 2007

혼합현실 기술을 휴대가 용이한 모바일 기기상에서 효과적으로 구현하기 위해서는 기기에 부착된 카메라의 위치를 인식하는 기술을 시작으로 입력된 실세계 공간에 가상의 디지털 정보를 정합하고 표현하는 기술, 사용자가 표현된 혼합현실 환경과 현실감있게 상호작용하는 기술, 그리고 다양한 응용분야에 맞게 혼합현실 콘텐츠를 저작하는 기술에 이르기까지 여러 가지 세부 기술들이 요구된다. 본 논문에서는 언급한 세부 기술들에 대한 개요와 국내외적으로 진행되고 있는 관련 기술들의 동향을 구체적인 사례를 통해 소개한다.

• Journal of Digital Contents Society
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• v.18 no.8
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• pp.1585-1591
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• 2017

In this study, we propose the application of exhibition contents using virtual environment technology in exhibition space. Research on the virtual environment is continuing. Particularly, research on virtual reality technology is one of the most active research fields. As researches and developments of augmented reality technologies have been carried out with the spread of smart phones, researches on virtual reality technologies have also made a lot of progress with emphasis on games and interactivity. Especially, development of hardware, software, and content is accelerating this year, including the development of various types of physical reality devices, especially HMD (Head Mounted Device) equipment and new product announcements. We want to study and apply the environment in which the system based on this virtual reality technology can approach and experience more user friendly in the exhibition space.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.700-705
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• 2007

프로젝션 기반의 증강현실(AR, augmented reality) 시스템이란, 고화질의 가상 정보를 프로젝터를 통하여 정해진 공간에 정확하게 표시해 주는 시스템을 말한다. 대부분의 증강현실 시스템은 사용자의 몰입감을 높이기 위해 고화질, 대 화면을 제공하기 위한 디스플레이 장치를 사용하며, 영상처리의 복잡도에 따른 고성능의 프로세스 장치를 요구하기 때문에 데스크탑 환경에서 이루어졌다. 그러나, 데스크탑 환경에서의 증강현실 시스템은 휴대가 불편하다는 단점을 가진다. 최근 프로젝터의 소형화와 모바일 프로세서의 성능 향상은 휴대가 편리한 모바일 증강현실 시스템의 등장을 가능하게 하였다. 그러나, 모바일 증강현실 시스템은 작은 디스플레이를 이용하여 영상 정보를 표시해 주기 때문에 높은 해상도를 지원할 수 없으며, 사용자의 몰입감을 감소시킨다는 단점을 가지고 있다. 본 논문에서는 기존의 증강현실 시스템의 단점을 보완하기 위하여 PDA와 소형 프로젝터를 결합하여 프로젝션 기반의 휴대용 멀티미디어 플레이어($PMP^2$ : Portable Multimedia Player using Projection-Based augmented reality)라는 모바일 증강현실 시스템을 제안한다. $PMP^2$는 모바일 프로세서의 대표격이라 할 수 있는 PDA와 휴대용 소형 프로젝터를 이용함으로써 고화질, 대화면의 증강현실 영상을 다수의 사용자가 원하는 장소와 시간에 즐길 수 있도록 해 준다. $PMP^2$는 스크린의 기하 및 컬러에 따른 왜곡을 보상해 줌으로써, 특정한 스크린 없이도 언제 어디서나 사용자에게 정확한 영상을 제공해 준다. 본 논문에서는 다양한 시나리오에 대해 $PMP^2$의 유용성을 검증함으로써 모바일 환경에서의 프로젝션 기반의 증강 현실 시스템의 활용 가능성을 제시한다.

• Journal of the Korea Computer Graphics Society
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• v.24 no.4
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• pp.21-27
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• 2018

In this paper, we propose a real-time interaction method using user's mouth wind in mobile device. In mobile and virtual reality, user interaction technology is important, but various user interface methods is still lacking. Most of the interaction technologies are hand touch screen touch or motion recognition. In this study, we propose an interface technology that can interact with real time using user's mouth wind. The direction of the wind is determined by using the angle and the position between the user and the mobile device, and the size of the wind is calculated by using the magnitude of user's mouth wind. To show the superiority of the proposed technique, we show the result of visualizing the flow of the vector field in real time by integrating the mouth-wind interface into the Navier-Stokes equations. We show the results of the paper on mobile devices, but can be applied in the Agumented reality(AR) and Virtual reality(VR) fields requiring interface technology.

• Journal of Satellite, Information and Communications
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• v.11 no.4
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• pp.102-106
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• 2016

With the popularity of smart phones and the help of high-speed wireless communication technology, high-quality multimedia contents have become common in mobile devices. Especially, the release of Oculus Rift opens a new era of virtual reality technology in consumer market. At the same time, 3D audio technology which is currently used to make computer games more realistic will soon be applied to the next generation of mobile phone and expected to offer a more expansive experience than its visual counterpart. This paper surveys concepts, algorithms, and systems for modeling 3D sound virtual environment applications. To do this, we first introduce an important design principle for audio rendering based on physics-based geometric algorithms and multichannel technologies, and introduce an audio rendering pipeline to a scene graph-based virtual reality system and a hardware architecture to model sound propagation.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2018.06a
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• pp.299-300
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• 2018

최근 증강현실(augmented reality) 기술이 큰 주목을 받고 있다. 스마트폰, HMD 등과 같은 모바일 기기의 성능 향상 및 위치 기반 서비스의 보편화로 인해 증강현실 기술의 유용성을 입증하는 다양한 응용 분야들이 소개되고 있다. 증강현실은 기본적으로 현실세계에 가상의 디지털 콘텐츠를 자연스럽게 병치하여 인간의 감각과 인식을 확장시키는 실감미디어 기술이다. 증강현실을 구현하기 위해서는 사용자나 현실세계의 상황을 파악하고 인지하기 위한 컴퓨터 비전 기술, 가상의 디지털 콘텐츠를 생성하고 렌더링하기 위한 컴퓨터 그래픽스 기술, 증강현실 콘텐츠와 상호작용하기 위한 상호작용 기술, 사용자 중심의 증강현실 프로그램 개발을 지원하기 위한 저작 기술 등 다양한 요소 기술들을 필요로 한다. 본 논문에서는 컴퓨터 비전 기술 중의 하나로 객체의 3차원 움직임(포즈 변화)을 추적하기 위한 방법들의 최신 동향을 간략하게 분석하고, 향후 발전 방향에 대해 전망해 본다.