• 센서학회지
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• 제16권3호
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• pp.220-228
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• 2007

For many applications particularly in navigation system, a three-dimensional representation improves the usability of information. This paper introduces 3D Graphical User Interface (GUI) of indoor location tracking system, 3D Navigation View. The application provides users a 3D visualization of the indoor environments they are exploring, synchronized with the physical world through spatial information obtained from indoor location tracking system. It adopts widely used Virtual Reality Modeling Language (VRML) to construct, represent, distribute and render 3D world of indoor environments over Internet. Java, an all-purpose programming language is integrated to comprehend spatial information received from indoor location tracking system. Both are connected through an interface called External Authoring Interface (EAI) provided by VRML. Via EAI, Java is given the authority to access and manipulate the 3D objects inside the 3D world that facilitates the indication of user's position and viewpoint in the constructed virtual indoor environments periodically.

• 한국지리정보학회지
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• 제15권3호
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• pp.81-90
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• 2012

최근 신재생에너지 자원에 대한 사회적인 관심 증대와 맞물려 IT(Information Technology) 기술과 공간정보기술의 급속한 발전에 따라 신재생에너지 분야에서도 GIS(Geographic Information System) 공간정보 분석 기술과의 융합을 통하여 체계적이고 과학적인 활용 방법들이 많이 연구되고 있다. 본 연구에서는 정확한 지형, 경제, 문화적 환경 요소들을 종합적으로 고려한 정확하고 정밀한 풍력에너지 시설물 적지분석 시스템 모듈 개발과 동시에 3차원 GIS 등과 같은 최신 공간 정보기술을 활용하여 정밀한 현장정보 구현과 3차원 결과물 표출, 3차원 객체 구현, 모의 등 풍력 신재생에너지 관련 종합정보를 관리할 수 있는 3차원 Web GIS 기반 풍력에너지 시설물 적지분석 시스템을 개발하였다. 이를 통하여 과학적인 신재생에너지 시설물 단지 조성과 함께 정확하고 정량적인 정보 수집, 관리, 분석이 가능할 뿐만 아니라 실시간 정보제공체계 구축의 전환점을 마련할 수 있었으며 3차원 영상기반 신재생에너지 자원정보 관리시스템 구축을 통한 다양한 현장정보 분석이 가능함으로써 합리적 의사결정 지원을 할 수 있게 되었다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.721-724
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• 2005

In this study the spatial distribution characters of forest in forest damaged area were first considered by analyzing spatial data and monitoring forest landscape. Then suitable tree species on each site were selected through the weighted score analysis of GIS analysis methods. Finally, the best forest stand arrangement method could be presented on the 3D based simulation system for the advanced reforestation technology in Korea. For this purpose, the virtual reforestation system was implemented by using the concept of virtual GIS and CBD (Component Based Development) method. By use of this system the change offorest landscape of burnt forest area some years after reforestation practice could be detected and monitored by applying the site index and 3D modeling method.

• ETRI Journal
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• 제45권2호
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• pp.240-253
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• 2023

Spatial information is geometrical information combined with the properties of an object. In city areas where unmanned aerial vehicle (UAV) usage demand is high, it is necessary to determine the appropriate driving altitude considering the height of buildings for safe driving. In this study, we propose a data-provision method that generates the driving altitude of UAVs with a pseudo-3D building model. The pseudo-3D building model is developed using high-precision spatial information provided by the National Geographic Information Institute. The proposed method generates the driving altitude of the UAV in terms of tile information, including the UAV's starting and arrival points and a straight line between the two points, and provides the data to users. To evaluate the efficacy of the proposed method, UAV driving altitude information was generated using data of 763 551 pseudo-3D buildings in Seoul. Subsequently, the generated driving altitude data of the UAV was verified in AirSim. In addition, the execution time of the proposed method and the calculated driving altitude were analyzed.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2009년도 춘계 종합학술대회 논문집
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• pp.488-490
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• 2009

3차원 지형 환경의 공간영상콘텐츠는 국토계획 및 통신설비계획, 철도건설, 시공, 입체적인 유비쿼터스 도시 구현, 안전 및 방재 등에서 많은 요구와 그 중요성이 크게 부각되고 있다. 국내 운행하고 있는 국토 및 도시지역의 지형공간정보를 가장 정밀하게 촬영하기 위하여 항공기에 고해상도 디지털 지상촬영 카메라를 탑재하여 원하는 지역에 대한 항공사진 촬영을 실시하여 지상의 기준점에 맞도록 기하보정을 실시하고, 각 지형에 수직대응 방향으로의 조건식을 적용한 정사보정작업을 거쳐 정확한 지도영상을 작성하였다. 지형공간위의 다양한 지형정보를 직접 혹은 간접으로 수집하여 데이터베이스화하기 위한 정확한 초기 공간 자료의 수집, 저장, 편집, 조작 및 응용기술의 데이터베이스 구축은 도시 및 지역 계획 및 설계뿐만 아니라 관련 미래의 공간콘텐츠 구성을 위한 유비쿼터스 정보통신에서 크게 활용할 수 있을 것이다.

• 한국멀티미디어학회논문지
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• 제20권3호
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• pp.520-532
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• 2017

Large-scale natural disasters such as typhoon and localized torrential downpour cause widespread human and property damages. Recently, management systems using GIS are being developed to manage such disasters from various angles. Integrated disaster management encompasses diverse areas such as prediction through the computation of disaster information and field support for response. The development of disaster information systems must also consider the installation of various computation modules. Furthermore, GIS is generally included for realistic description of the field situation and for spatial operations. This study aims to develop the core module of a visualization platform for the 3D GIS services of integrated disaster information using Unity engine This system will enable integrated disaster management from various angles, encompassing disaster prevention experts, field support personnel, and citizens.

• 한국산학기술학회논문지
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• 제18권3호
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• pp.56-62
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• 2017

최근 3차원 공간정보에 대한 수요가 증가하면서 국토교통부, 서울시, 다음 카카오 등 여러 지자체 및 관련 업계에서 서비스를 구축하여 제공하고 있다. 이러한 지도 기반의 3차원 공간정보서비스에서 위치정확도는 특정 업무의 활용 가능성을 결정짓는 중요한 요소이다. 기존의 BIM 데이터는 상대좌표값으로 작성되어 절대좌표값을 갖는 GIS 데이터와 연계하는데 어려움이 있었다. 따라서 본 연구는 BIM/GIS 플랫폼 기반 모델링 데이터 구축을 통해 실내외 3차원 공간정보 간의 위치보정 방안을 제시하였다. 이를 위하여 플랫폼 테스트베드 대상을 선정한 후 데이터 구축 프로세스를 총 3단계로 진행하고, 실내공간정보를 다루는 BIM 모델과 실감형 가시화를 위한 정사영상 기반 3차원 텍스처링 모델 간 위치 불일치의 문제점을 파악하여 위치보정 알고리즘을 설계하였다. 단일 건물을 대상으로 상대좌표 기반의 BIM 모델 데이터를 절대좌표 기반의 텍스처링 데이터와 연계하기 위해 절대좌표 변환 알고리즘을 구현하여 건물의 절대위치를 1차 계산하고 BIM/GIS 플랫폼 지도상에서 텍스처링 데이터와 2차 매핑하여 3차원 모델 데이터의 최종 위치를 보정하였다.

• 한국산업융합학회 논문집
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• 제26권5호
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• pp.775-784
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• 2023

Drone images are being used more and more actively in the fields of surveying and spatial information, and are rapidly replacing existing aerial and satellite images. The technology of quickly acquiring real-time data at low cost and processing it is now being applied to actual industries beyond research. However, there are also problems encountered as this progresses. When high-resolution spatial information is acquired using a general 2D flight plan for a terrain with sever undulations, problems arise due to the difference in resolution of the data. In particular, when a low-altitude high-resolution image is taken using a drone in a mountainous or steep terrain, there may be a problem in image matching due to a resolution difference caused by terrain undulations. This problem occurs because a drone acquires data while flying on a 2D plane at a fixed altitude, just like conventional aerial photography. In order to acquire high-quality 3D data using a drone, the scale difference for the shooting distance should be considered. In addition, in order to obtain facade images of large structures, it is necessary to take images in 3D space. In this study, in order to improve the disadvantages of the 2D flight method, a 3D flight plan was established for the study area, and it was confirmed that high-quality 3D spatial information could be obtained in this way.

• Journal of Information Processing Systems
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• 제15권2호
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• pp.399-409
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• 2019

Three-dimensional (3D) human pose reconstruction from single-view image is a difficult and challenging topic. Existing approaches mostly process frame-by-frame independently while inter-frames are highly correlated in a sequence. In contrast, we introduce a novel spatial-temporal 3D human pose reconstruction framework that leverages both intra and inter-frame relationships in consecutive 2D pose sequences. Orthogonal matching pursuit (OMP) algorithm, pre-trained pose-angle limits and temporal models have been implemented. Several quantitative comparisons between our proposed framework and recent works have been studied on CMU motion capture dataset and Vietnamese traditional dance sequences. Our framework outperforms others by 10% lower of Euclidean reconstruction error and more robust against Gaussian noise. Additionally, it is also important to mention that our reconstructed 3D pose sequences are more natural and smoother than others.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.349-350
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• 2023

In the field of domestic construction, 3D modeling mainly targets outdoor construction sites, and acquires outdoor spatial information by operating UAVs and UGVs equipped with cameras. 3D modeling of construction sites tends to expand its scope to indoors along with the increasing demand for site monitoring and management through indoor spatial information. In the case of indoors, it is impossible to shoot with a drone after the framework and outer walls of the building are completed, so it is necessary to collect indoor spatial information and 3D modeling using a 360 camera. The purpose of this study is limited to basic research to establish a process that can obtain simple and high-quality indoor 3D modeling results using indoor data collected from 360 cameras.