• 제목/요약/키워드: building detection

검색결과 726건 처리시간 0.024초

분할과 중첩 기법을 이용한 항공 사진 상의 빌딩 경계 추출 (Extraction of Building Boundary on Aerial Image Using Segmentation and Overlaying Algorithm)

  • 김용민;장안진;김용일
    • 한국측량학회지
    • /
    • 제30권1호
    • /
    • pp.49-58
    • /
    • 2012
  • 도심지의 빌딩들은 시간이 갈수록 형태가 다양해지고, 식생이나 도로와 같은 객체들과 유사한 분광 특성을 나타냄으로써 광학 영상만을 이용하여 추출하기가 어려워지고 있다. 본 연구에서는 이러한 문제를 해결하기 위해 항공 Light Detection and Ranging(LiDAR) 자료와 항공 사진의 융합을 통해 항공 사진상에서의 빌딩과 그 경계를 추출하는 방법을 제안한다. 먼저 항공 사진에 Adaptive dynamic range linear stretching 방사 강조 기법을 적용하고, 에디슨 에지 디텍터를 이용하여 이진 경계 지도를 생성하였다. 동시에 항공 LiDAR 자료로부터 normalized Digital Surface Model을 생성하고, 빌딩 영역을 추출하여 이진 경계 지도와의 중첩을 통해 임시 빌딩 영역을 추출하였다. 마지막으로 항공 LiDAR 자료와 항공 사진 간의 위치 오차를 고려하여 경계 강화 과정을 수행함으로써 최종 빌딩 경계를 추출하였다. 제안 방법의 검증을 위해 두 개의 실험 지역을 선정하여 제안 방법을 적용하였고, 정량적인 정확도평가에서 F-measure, Jaccard coefficient, Yule coefficient, Overall accuracy의 값이 모두 0.85 이상의 정확도를 보여주었다.

Investigation of Building Extraction Methodologies within the Framework of Sensory Data

  • Seo, Su-Young
    • Spatial Information Research
    • /
    • 제16권4호
    • /
    • pp.479-488
    • /
    • 2008
  • 본 논문은 건물추출 기법에 있어서 기존 연구들을 분석하기 위하여 활용센서의 관점에서 분류하고 이에 따라 주요 기법들을 분석하였다. 지난 수십 년간, 많은 유형의 센서자료가 매핑과학기술분야에 도입되어 왔고, 그들의 특성은 공간해상력과 자료처리 측면에서 매우 다양하다. 이에 따라, GIS분야에서 이러한 자료들을 이용함으로써 실세계의 3차원 가상공간 구축이 가능해지고 있고, 이는 도시설계, 재난관리 및 토목공사 등 여러 응용분야에 활용될 수 있을 것으로 기대된다. 이와 관련하여, 본 연구는 건물추출에 대한 기존 연구들을 먼저 건물 영역탐지와 모델링의 두 가지 대주제로 분류한 후 기법들에 대한 장단점을 분석하였다. 본 연구에서 제시하는 분석결과는 목적에 따라 자동화 알고리즘을 향상시키거나 적합한 센서자료를 선택하는데 있어서 유용하게 활용될 수 있을 것이다.

  • PDF

DEVELOPMENT OF BUILDING INFORMATION MODEL FOR RESOURCES OPTIMIZATION IN CONSTRUCTION PROJECT

  • Gopal M. Naik;Rokhsareh Badamahgan
    • 국제학술발표논문집
    • /
    • The 5th International Conference on Construction Engineering and Project Management
    • /
    • pp.634-639
    • /
    • 2013
  • The aim of the study is to develop the 3D visualization of Building Information Model and integrated 4D model for optimization of resources in the construction project. This study discuss the process of methodology and creation of 4D model of the project and simulate it to monitor the workflow at the site. Different stages of the construction process and activities are generated by using Revit and MS Project. MS project has been used for creation of the schedules and these are linked with the Revit for 3D modeling. The time used as the fourth dimension and 4D model created by using Navisworks Time liner software. Narges shopping center is presented as a case study to realize the actual uses and benefits of Building Information Model (BIM). Narges shopping mall is located in Tehran, Iran. As a part of Hekmat master plan, Narges shopping center is an 11 stores building with a total area of 30000 Sq.m. This shopping and entertainment center is comprised of 150 retails and two multi-use public halls with a capacity of 400 persons each and underground parking with total 400 parking space. The main purpose of architecture was to create an urban public center along with its revolving, spiral like form and an ever changing continuous façade by means of different colors, materials, which is in harmony with the other building of the master plan. The approximate cost of the project is $17 million and duration of the project schedule is 30 months. The developed Building Information Model enabled us to identify the potential collisions or clashes between various structural and architectural systems. 4D model has been used for limiting the interaction between subcontractors installing the different systems so rework could be avoided and productivity maximized. It is also observed that the utility of BIM for construction stimulation and clash detection is the best suitable method. Clash detection before the implementation of work is highly recommended to avoid rework.

  • PDF

굴삭기의 장애물 탐지용 틸트 모듈 개발 (Development of Tilt Module for Object Detection of Excavator)

  • 최창훈;소지윤;이준복;한충희
    • 한국건축시공학회지
    • /
    • 제11권3호
    • /
    • pp.276-282
    • /
    • 2011
  • 건설산업은 기계화 시공을 통해 많은 이점을 이뤘지만 건설기계로 인한 안전사고율의 증가로 사고사망률 또한 급속도로 증가하였다. 따라서 본 연구는 건설 작업 시 작업환경의 안전 확보를 위한 굴삭기 로컬영역 장애물 탐지 시스템에 활용할 틸트 모듈 개발을 목적으로 진행하였다. 본 연구에서는 장애물 탐지 시스템의 효율을 높이기 위해 변경된 레이저 센서의 성능테스트를 진행하였으며 이를 바탕으로 개념 설계, 실시 설계를 통해 틸트 모듈을 개발하였다. 이는 굴삭기의 안전관리 시스템에 적용 가능하며 이를 활용하여 시스템의 효율을 높일 수 있을 것이다.

Simulation Analysis of Safety Evacuation in University Experiment Building

  • Tao Zhang;Ha-Sung Kong
    • International Journal of Internet, Broadcasting and Communication
    • /
    • 제16권2호
    • /
    • pp.218-226
    • /
    • 2024
  • According to the actual situation of a university, the emergency evacuation simulation is modeled based on the physical sign, evacuation speed and personnel ratio using the pathfinder software.The experimental construction export utilization rate is compared with the preliminary simulation scenario. The simulation results show that the utilization rate of evacuation stairs and evacuation exits is significantly improved.The optimized solution can provide the most effective evacuation passage, and the research results can provide the basis for the rational planning and management of evacuation passage in university experiment building.

Joint Reasoning of Real-time Visual Risk Zone Identification and Numeric Checking for Construction Safety Management

  • Ali, Ahmed Khairadeen;Khan, Numan;Lee, Do Yeop;Park, Chansik
    • 국제학술발표논문집
    • /
    • The 8th International Conference on Construction Engineering and Project Management
    • /
    • pp.313-322
    • /
    • 2020
  • The recognition of the risk hazards is a vital step to effectively prevent accidents on a construction site. The advanced development in computer vision systems and the availability of the large visual database related to construction site made it possible to take quick action in the event of human error and disaster situations that may occur during management supervision. Therefore, it is necessary to analyze the risk factors that need to be managed at the construction site and review appropriate and effective technical methods for each risk factor. This research focuses on analyzing Occupational Safety and Health Agency (OSHA) related to risk zone identification rules that can be adopted by the image recognition technology and classify their risk factors depending on the effective technical method. Therefore, this research developed a pattern-oriented classification of OSHA rules that can employ a large scale of safety hazard recognition. This research uses joint reasoning of risk zone Identification and numeric input by utilizing a stereo camera integrated with an image detection algorithm such as (YOLOv3) and Pyramid Stereo Matching Network (PSMNet). The research result identifies risk zones and raises alarm if a target object enters this zone. It also determines numerical information of a target, which recognizes the length, spacing, and angle of the target. Applying image detection joint logic algorithms might leverage the speed and accuracy of hazard detection due to merging more than one factor to prevent accidents in the job site.

  • PDF

An Application of Negative Selection Process to Building An Intruder Detection System

  • Kim, Jung W.;Park, Jong-Uk
    • 한국정보보호학회:학술대회논문집
    • /
    • 한국정보보호학회 2001년도 종합학술발표회논문집
    • /
    • pp.147-152
    • /
    • 2001
  • This research aims to unravel the significant features of the human immune system, which would be successfully employed for a novel network intrusion detection model. Several salient features of the human immune system, which detects intruding pathogens, are carefully studied and the possibility and the advantages of adopting these features for network intrusion detection are reviewed and assessed.

  • PDF

AEKF(Adaptive Extended Kalman Filter)를 이용하는 건축 구조물의 손상탐지 (Damage Detection of Building Structures using AEKF(Adaptive Extended Kalman Filter))

  • 윤다요;김유석;박효선
    • 한국전산구조공학회논문집
    • /
    • 제32권1호
    • /
    • pp.45-54
    • /
    • 2019
  • 본 논문에서는 EKF기법의 초기 파라미터 설정에 따른 상태벡터의 발산 문제를 해결하고자 AEKF기법을 제시한다. EKF기법의 초기 파라미터는 상태벡터 수렴 및 안정성에 중요한 역할을 함으로 초기 파라미터의 적절한 설정은 EKF를 사용함에 있어 매우 중요하다. AEKF방법은 초기 파라미터인 P행렬을 k스텝마다 업데이트하여 초기 상태벡터의 변화에 민감하게 반응할 수 있으며, 또한 초기 상태벡터와 실제 시스템 모델과의 차이가 크게 발생하여도 적응적으로 P행렬의 값을 조절하여 상태벡터의 수렴을 가능하게 한다. 또한 Q행렬 및 R행렬을 k스텝 업데이트하여 상태벡터의 수렴 안정성을 더욱 확보하였다. 3DOF시스템을 통해서 AEKF기법의 결과와 EKF, UKF기법을 비교 검증하였다.

Automatic Building Extraction from Airborne Laser Scanning Data using TIN

  • Jeong Jae-Wook;Chang Hwi-Jeong;Cho Woosug;Kim Kyoung-ok
    • 대한원격탐사학회:학술대회논문집
    • /
    • 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
    • /
    • pp.132-135
    • /
    • 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.

  • PDF

Nonlinear damage detection using higher statistical moments of structural responses

  • Yu, Ling;Zhu, Jun-Hua
    • Structural Engineering and Mechanics
    • /
    • 제54권2호
    • /
    • pp.221-237
    • /
    • 2015
  • An integrated method is proposed for structural nonlinear damage detection based on time series analysis and the higher statistical moments of structural responses in this study. It combines the time series analysis, the higher statistical moments of AR model residual errors and the fuzzy c-means (FCM) clustering techniques. A few comprehensive damage indexes are developed in the arithmetic and geometric mean of the higher statistical moments, and are classified by using the FCM clustering method to achieve nonlinear damage detection. A series of the measured response data, downloaded from the web site of the Los Alamos National Laboratory (LANL) USA, from a three-storey building structure considering the environmental variety as well as different nonlinear damage cases, are analyzed and used to assess the performance of the new nonlinear damage detection method. The effectiveness and robustness of the new proposed method are finally analyzed and concluded.