• 한국전자통신학회논문지
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• 제7권5호
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• pp.1005-1010
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• 2012

증강현실은 차세대에 각광받고 있는 기술로써 카메라로 보이는 현실 공간에 3D 가상 객체를 삽입하는 기술로써 사용자와 객체간의 상호작용을 이용하여 몰입감과 흥미를 유발하여 학습효과를 최대화 할 수 있다. 최근에는 이동성과 휴대성이 뛰어난 모바일이 보편화됨으로써 모바일을 이용한 다양한 증강현실을 선보이고 있다. 본 논문에서는 사용자에게 몰입감과 흥미 위주의 학습내용을 제공하기 위하여 모바일 환경에서 증강되어진 3D 어류백과 시스템을 설계하였다. 본 시스템은 어류백과 사전의 어류그림을 마커로 인식하여 서버에 저장되어진 3D 모델을 불러와서 모바일 환경에서 디스플레이 함으로 어류학습에 도움을 주고자 한다.

• International Journal of Contents
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• 제9권1호
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• pp.18-25
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• 2013

Recently, augmented reality has been proved immensely useful on a day to day basis when tied with location-based technology. In this paper, we present a new method for displaying augmented reality contents on mobile devices. We add 3D models on the view of the camera and use location-based services, motion sensors to calculate the transformation of models. Instead of remaining at a fixed position on camera view while moving around a 3D model, the model rotates on display in the opposite direction that the user is walking. We also design client as a ubiquitous client to reduce constraints on disk space and memory capacity on mobile devices. Implementation results show effective use in creating GPS-based 3D view augmented reality contents for Smart Mobile Devices.

• 디지털산업정보학회논문지
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• 제12권4호
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• pp.107-114
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• 2016

Recently, 3D related technology has become a hot topic for IT. 3D technologies such as 3DTV, Kinect and 3D printers are becoming more and more popular. According to the flow of the times, the goal of this study is that the general public is exposed to 3D technology easily. we have developed a web-based application program that enables 3D modeling of facial front and side photographs using a mobile phone. In order to realize 3D modeling, two photographs (front and side) are photographed with a mobile camera, and ASM (Active Shape Model) and skin binarization technique are used to extract facial height such as nose from facial and side photographs. Three-dimensional coordinates are generated using the face extracted from the front photograph and the face height obtained from the side photograph. Using the 3-D coordinates generated for the standard face model modeled with the standard face as a control point, the face becomes the face of the subject when the RBF (Radial Basis Function) interpolation method is used. Also, in order to cover the face with the modified face model, the control point found in the front photograph is mapped to the texture map coordinate to generate the texture image. Finally, the deformed face model is covered with a texture image, and the 3D modeled image is displayed to the user.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2006년도 춘계 종합학술대회 논문집
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• pp.302-309
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• 2006

우리는 게임과 애니메이션을 구분한다. 그러나 애니메이션의 정의는 [움직이는 이미지]로서 게임 역시 조작 가능한 애니메이션의 또 다른 형태일 뿐이다. 실제 게임제작에서 애니메이션의 여러 원리 원칙 들이 더 적용되고, 더욱이 최근 많이 활성화 되고 있는 모바일 게임에서는 그 화면 크기 등 모바일의 특성으로 인해 더욱 더 애니메이션의 원리, 원칙이 강조되어 제작되고 있다. 이에 논자는 2006년 후반기 SKT에서 실제 서비스 예정인 모바일 3D 게임 [플라이 투더 뮤직]의 제작 과정을 위해 월트디즈니 스튜디오에서 나온 애니메이션 12 원칙의 적용에 대해 연구하고, 3D 모바일 게임 애니메이션 제작에서의 개발에 대해 일반 애니메이션과의 차이점을 연구하였다.

• International Journal of Internet, Broadcasting and Communication
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• 제13권1호
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• pp.54-60
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• 2021

AR (Augmented Reality) is a technology that provides virtual content to the real world and provides additional information to objects in real-time through 3D content. In the past, a high-performance device was required to experience AR, but it was possible to implement AR more easily by improving mobile performance and mounting various sensors such as ToF (Time-of-Flight). Also, the importance of mobile augmented reality is growing with the commercialization of high-speed wireless Internet such as 5G. Thus, this paper proposes a system that can provide AR services via GNN (Graph Neural Network) using cameras and sensors on mobile devices. ToF of mobile devices is used to capture depth maps. A 3D point cloud was created using RGB images to distinguish specific colors of objects. Point clouds created with RGB images and Depth Map perform downsampling for smooth communication between mobile and server. Point clouds sent to the server are used for 3D object detection. The detection process determines the class of objects and uses one point in the 3D bounding box as an anchor point. AR contents are provided through app and web through class and anchor of the detected object.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.1093-1099
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• 2022

The number of buildings is increasing day by day. The next logical footstep is tackling challenges regarding scarcity of resources and sustainability, as well as shifting focus on existing building structures to renovate and retrofit. Many existing old and heritage buildings lack documentation, such as building models, despite their necessity. Technological advances allow us to use virtual reality, augmented reality, and mixed reality on mobile platforms in various aspects of the construction industry. For these purposes, having a BIM model or high detail 3D model is not always necessary, as a simpler model can serve the purpose within many mobile platforms. This paper streamlines a framework for generating a lightweight 3D model for mobile platforms. In doing so, we use an existing structure's site survey data for the foundation data, followed by mobile VR implementation. This research conducted a pilot study on an existing building. The study provides a process of swiftly generating a lightweight 3D model of a building with relative accuracy and cost savings.

• 게임&엔터테인먼트 논문지
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• 제2권2호
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• pp.25-34
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• 2006

우리는 게임과 애니메이션을 구분한다. 그러나 애니메이션의 정의는 [움직이는 이미지]로서 게임 역시 조작 가능한 애니메이션의 또 다른 형태일 뿐이다. 실제 게임제작에서 애니메이션의 여러 원리 원칙들이 더 적용되고, 더욱이 최근 많이 활성화되고 있는 모바일 게임에서는 그 화면 크기 등 모바일의 특성으로 인해 더욱 더 애니메이션의 원리, 원칙이 강조되어 제작되고 있다. 이에 논자는 2006년 후반기 SKT에서 실제 서비스 예정인 모바일 3D 게임 [플라이 투더 뮤직]의 제작에 월트디즈니 스튜디오에서 나온 애니메이션 12 원칙의 적용에 대해 연구하였다.

• 제어로봇시스템학회논문지
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• 제22권9호
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• pp.745-752
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• 2016

We suggest an efficient Simultaneous Localization and 3D Polygon Map Building (SLAM) method with Kinect depth sensor for mobile robots in indoor environments. In this method, Kinect depth data is separated into row planes so that scan line segments are on each row plane. After grouping all scan line segments from all row planes into line groups, a set of 3D Scan polygons are fitted from each line group. A map matching algorithm then figures out pairs of scan polygons and existing map polygons in 3D, and localization is performed to record correct pose of the mobile robot. For 3D map-building, each 3D map polygon is created or updated by merging each matched 3D scan polygon, which considers scan and map edges efficiently. The validity of the proposed 3D SLAM algorithm is revealed via experiments.

• 한국전자통신학회논문지
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• 제7권5호
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• pp.1011-1016
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• 2012

최근 이동통신의 발전으로 스마트폰 및 테블릿 PC 같은 이동 단말기들이 활발하게 보급되고 있다. 이러한 모바일 기기를 이용하여 다양한 증강현실이 구현되고 있다. 본 논문에서는 모바일 증강현실을 이용한 3D 선박 디스플레이 시스템을 설계하고, 도면 매칭 알고리즘을 구현하였다. 본 시스템을 이용하여 선박수주 활성화에 도움을 주고자 한다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.293-296
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• 2004

We first report an application of plastic LCDs to 2D-3D convertible mobile phones. Plastic LCDs are proven to be most suitable solution for filter LCDs attached on main LCDs of 3D mobile phones in terms of quality and cost wises. The design and fabrication of plastic LCD filters are discussed in this paper.