• Journal of Korea Multimedia Society
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• v.18 no.2
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• pp.97-105
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• 2015

When people go to travel, sometimes one writes many articles about the destination. Existing travel information services such as Blog, Internet Cafe, and SNS are difficult to provide realistic information since the provided information may not be a place directly on the road. This paper presents a travel information system including recommended courses, theme courses, and travel map. In addition, the proposed system can provide the functions of writing, reading, and deleting a message note that stores the travel information based on the augmented reality if a defined marker among the community members is recognized in a smartphone App. Therefore, this paper can present an implementation method for new community system using augmented reality and image processing as well as providing the conventional travel information services, and allows the user to take advantage of the realistic and accurate information.

• Journal of information and communication convergence engineering
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• v.9 no.5
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• pp.619-623
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• 2011

The evolution of technology has lead gaming playable in augmented reality and more games are developed only for augmented reality. There are mainly no supportive reasons for game designed in non-augmented reality and transforms to augmented reality. Genre of game played in augmented reality is always one of the defined game genres. In this paper, transformation process and effects of mobile games to augmented reality is discussed. Augmented reality game is recommended for mobile devices due to its portability. Modification for mobile games transformation including way of game rendering, game controlling, camera view controlling and game environment design are discussed. User experience is affected after the game transformed to augmented reality because of the differences in game controlling. The presence of game in real world is increased due to the usage of actual view in game playing.

• Korea Multimedia Society
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• v.13 no.3
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• pp.12-20
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• 2009

• 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 Korea Multimedia Society
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• v.12 no.6
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• pp.856-866
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• 2009

Recent development in game technologies has offered various game environments, but the existing games have not provided realistically felt game environments because the element of the game is virtually generated in most of the games. Therefore, we propose a mixed game environment based on spatial augmented reality by using a creature that really exists. In the proposed game environment, tracking based on camera images created in real-time enables the provision of information about the real creature that is both still and moving. The game environment is presented with virtual object by using the coordinate of a real creature. Then, spatial augmented reality technology is applied for mixing a real creature and virtual game elements. Thus, the game scene is displayed by the spatial augmented reality technique based on the real-time coordinate of real creatures. Moreover, by providing the realistic game environment based on the spatial augmented reality, our system can be applied to various game contents that are actually felt as real. Most importantly, our system arouses the players' interest in a new kind of game environment.

• Journal of Korea Multimedia Society
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• v.22 no.10
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• pp.1142-1148
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• 2019

Reconstruction of the three-dimensional (3D) environment is a key aspect of augmented reality and augmented virtuality, which utilize and incorporate a user's surroundings. Such reconstruction can be easily realized by employing a Kinect device. However, multiple Kinect devices are required for enhancing the reconstruction density and for spatial expansion. While employing multiple Kinect devices, they must be calibrated with respect to each other in advance, and a marker is often used for this purpose. However, a marker needs to be placed at each calibration, and the result of marker detection significantly affects the calibration accuracy. Therefore, a user-friendly, efficient, accurate, and marker-less method for calibrating multiple Kinect devices is proposed in this study. The proposed method includes a joint tracking algorithm for approximate calibration, and the obtained result is further refined by applying the iterative closest point algorithm. Experimental results indicate that the proposed method is a convenient alternative to conventional marker-based methods for calibrating multiple Kinect devices. Hence, the proposed method can be incorporated in various applications of augmented reality and augmented virtuality that require 3D environment reconstruction by employing multiple Kinect devices.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.05a
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• pp.485-486
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• 2019

Simulated driving behavior is an important aspect of realistic simulation systems. To simulate natural driving behavior, this paper proposes an imitation learning method based on active learning that combines demonstration and experience. Driving demonstrations are collected from human drivers in a driving simulator. A driving behavior policy is learned from these demonstrations. The driving demonstration dataset is augmented with new demonstrations that the original demonstrations did not contain, in the form of behaviors from another driving behavior policy learned from experience. The final driving behavior policy is learned from an augmented demonstration dataset.

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.07a
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• pp.27-29
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• 2012

본 논문에서는 최근 사용량이 급증한 스마트폰을 이용한 증강현실 시스템을 제안한다. 이 시스템은 스마트폰 기기의 GPS와 센서 기능을 활용하여 현재 위치를 탐색하고, 무선 네트워크를 사용하여 주변 위치정보를 다운로드 하여 표시한다. 또한 이 시스템은 다운로드한 위치정보의 내용을 활용하여 사용자에게 정보를 제공한다. 애플리케이션이 수행 중인 동안 계속하여 현재 위치탐색과 위치 정보 다운로드 및 갱신이 이루어져 사용자로 하여금 정보 인식에 편의성을 제공하고자 한다.

• Journal of Digital Contents Society
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• v.16 no.6
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• pp.943-950
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• 2015

In this study, we propose an annotation system exhibits a secondary role using augmented reality in the exhibition environment. Common methods that utilize the description of the picture or photo booklet or audio device to the exhibition and in the form of viewing the exhibits while people describe method is used. We are using augmented reality technology, in addition to these conventional methods to provide a variety of information about the exhibits utilizing text, photos, video and audio of the multimedia medium. Where visitors can use a smart phone in hand deulgoseo, the exhibition becomes a secondary role by applying the Augmented Reality technology in tablet-based devices.

• Journal of Korea Multimedia Society
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• v.12 no.12
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• pp.1761-1768
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• 2009

In this paper, we implemented online real time strategy game using hand as the mouse in augmented reality. Also, we introduced the algorithm for detecting hand direction, finding fingertip of the index finger and counting the number of fingers for interaction between users and the virtual objects. The proposed method increases the reality of the game by combining the real world and the virtual objects. Retinex algorithm is used to remove the effect of illumination change. The implementation of the virtual reality in the online environment enables to extend the applicability of the proposed method to the areas such as online education, remote medical treatment, and mobile interactive games.