• Journal of Electrical Engineering and Technology
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• 제3권3호
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• pp.436-443
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• 2008

This paper presents a new method for building detection and reconstruction from aerial images. In our approach, we extract useful building location information from the generated disparity map to segment the interested objects and consequently reduce unnecessary line segments extracted in the low level feature extraction step. Hypothesis selection is carried out by using an undirected graph, in which close cycles represent complete rooftops hypotheses. We test the proposed method with the synthetic images generated from Avenches dataset of Ascona aerial images. The experiment result shows that the extracted 3D line segments of the reconstructed buildings have an average error of 1.69m and our method can be efficiently used for the task of building detection and reconstruction from aerial images.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.132-135
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• 2004

Building information plays a key role in diverse applications such as urban planning, telecommunication and environment monitoring. Automatic building extraction has been a prime interest in the field of GIS and photogrammetry. In this paper, we presented an automatic approach for building extraction from lidar data. The proposed approach is divided into four processes: pre-processing, filtering, segmentation and building extraction. Experimental results showed that the proposed method detected most of buildings with less commission and omission errors.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2010년도 춘계 학술논문 발표대회 1부
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• pp.195-199
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• 2010

Today, as construction industry grows rapidly, technology has advanced throughout the whole industrial world. Architectural design phase has gone digital from the traditional method of drawing which was an important means in the past, and Building Information Modeling(BIM), an emerging new paradigm, changed architectural design process. So this paper studies the difference between a 2D-based and a BIM-based design process which are currently applied to domestic, and proposes a BIM-based integrated design process in order to help establish BIM to domestic efficiently.

• 전기전자학회논문지
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• 제12권1호
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• pp.51-58
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• 2008

This paper presents a new method for building detection and reconstruction from aerial images. In our approach, we extract the useful building location information from the generated disparity map to obtain the segmentation of interested objects and thus reduce significantly unnecessary line segment extracted in low level feature extraction step. Hypothesis selection is carried out by using undirected graph in which close cycles represent complete rooftops hypotheses, and hypothesis are finally tested to contruct building model. We test the proposed method with synthetic images generated from Avenches dataset of Ascona aerial images. The experiment result shows that the extracted 3D line segments of the buildings can be efficiently used for the task of building detection and reconstruction from aerial images.

• Journal of information and communication convergence engineering
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• 제8권6호
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• pp.709-715
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• 2010

This paper represents a map building and localization system for mobile robot. Map building and navigation is a complex problem because map integrity cannot be sustained by odometry alone due to errors introduced by wheel slippage, distortion and simple linealized odometry equation. For accurate localization, we propose sensor fusion system using encoder sensor and indoor GPS module as relative sensor and absolute sensor, respectively. To build a map, we developed a sensor based navigation algorithm and grid based map building algorithm based on Embedded Linux O.S. A wall following decision engine like an expert system was proposed for map building navigation. We proved this system's validity through field test.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.485-492
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• 2020

Information on the energy consumption of buildings that can be obtained through conventional methods is limited. Therefore, this study aims to develop a model that can support decision making about building facility management through digital transformation technologies. Through the IoT sensor, the building's energy data and indoor air quality data are collected, and the monitored data is visualized through the ELK Stack and produced as a dashboard. In addition, the target building is photographed with a 360-degree camera and maps using a tool to create a 360-degree tour. Using such digital transformation technologies, users of buildings can obtain various information in real time without visiting buildings directly. This can lead to changes in actions or actions for building management, supporting facility management decisions, and consequently reducing building energy consumption.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.211-212
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• 2023

Building Information Modeling (BIM) design has been mandatory in Korea since 2016, and it has been gradually expanding in the industry, with a slow attempt to apply it in remodeling constructions. This is because Korea is facing a situation where many buildings are over 30 years old and require remodeling or reconstruction. The remodeling industry is also a growing market, as it saves construction time and cost compared to reconstruction. BIM is an ideal technology element for a competitive remodeling construction, as remodeling constructions face a complicated construction process from the start, including demolition, maintenance, and reinforcement to save the change process. However, there are still limitations in applying BIM to remodeling constructions, due to considerations of the existing building and the complicated requests of the inhabitants. BIM still has technical and environmental limitations for general use. In this study, I analyzed BIM application cases from existing studies and suggest what improvement points should be strengthened.

• Spatial Information Research
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• 제5권2호
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• pp.133-146
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• 1997

최근에 이르러 서울에서는 교량이나 건축물 등 도시시설물에서 재난이 빈발하고 있어 이를 사전에 방지하거나 그 피해를 최소화하기 위해서 도시시설물에 대한 체계적인 안전관리대책 수립의 필요성이 절실해진 상황이다. 따라서 본 연구에서는 건축물에 대한 도시방재시스템을 구축하고 운용하는 것에 대한 방안을 제시하므로써 다른 도시시설물 방재시스템 구축시에 시행착오를 최소화하는데 기여하고자 하였다.본 연구에서는 건축물안전관리정보체계를 제시하고 이를 건축물방재시스템에 대해 활용방안을 제시하였다. 이를 위하여 연구한 주요 연구내용은 건축물유지관리정보체계, GIS 를 이용한 건축물방재시스템 등에 대한 구축 및 활용방안 등이다. 건축물방재시스템을 운용하기 위해서는 방재시스템에 연계 가능한 건축물 안전관리정보체계 구축이 선행되어야 하고, 이러한 조건하에서 관련 데이터베이스 특히 GIS와의 연계가 용이한 것으로 나타났다. 이를 활용하기 위해서는 안저도평가 프로그램, 비용산정프로그램, 대장관리프로그램 등의 기본적인 응용프로그램도 구비하여야 한다. 그리고 건축물 안전관리정보체계를 구축하고 운용하기 위하여는 중앙정부나 서울시 차원에서 표준화 사업과 시범사업을 통하여 실용화 방안이 보완되고, 그에 따른 제도적 뒷받침도 뒤따라야 할 것이다.

• 한국도서관정보학회지
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• 제30권3호
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• pp.405-426
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• 1999

Academic societies in the field of science and technology are major producers of domestic research information. These information are very important sources to researchers, students and so on. KORDIC built an integrated information system which facilitates the progress of building databases and promotes users easy access to databases. In order to build efficient society research information system, we investigated former cases and analyzed requirement of each society. We identified principal information sources and built an integrated information service system using internet homepage and information retrieval system(KRISTAL-II). In the future we will expand participating societies and focus on text-based information.

• 지적과 국토정보
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• 제52권1호
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• pp.105-118
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• 2022

최근 메타버스, 스마트시티, 디지털트윈, 자율주행차, 도심항공모빌리티 등 분야에서 3D공간객체모델 관련 정보 요구는 증가될 것이다. 공간객체에 대한 3D모델 구축은 위성·항공·지상플랫폼과 같은 다양한 장비와 모델링·인공지능·영상정합 등의 기술로 가능하다. 하지만 갱신이 필요한 공간객체를 신속하게 탐지하고 DB화하는 작업은 쉽지 않다. 이 연구에서는 공간정보(도형)과 속성을 기반으로 주소코드, 층수, 건물명, 면적 등의 매칭요소를 이용하여 건물융합DB와 변화탐지건물DB를 구축 지원할 수 있고 갱신이 필요한 객체선정의 적합성을 검증할 수 있는 시스템 프로토타입을 개발하였다. 건물융합DB 구축 시 일부 건물의 경우, 공간정보와 속성의 융합불가 및 실패 사례가 발생하여, 매칭율이 약 80%로 낮게 나타났다. 이것은 특별히 시범사업지역 내 많은 건물객체에 대한 속성정보가 누락된 것에 기인하는 것으로 판단된다. 이 연구는 3D공간객체 모델의 신속한 갱신을 위한 효율적인 드론 촬영계획 수립을 지원하여 공간객체의 중복 및 불필요한 구축 등을 사전에 방지함으로써 객체 구축 절차 개선 및 비용 절감에 크게 기여할 것이다.