• Title/Summary/Keyword: 3D spatial-modeling

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Surface Deformation by using 3D Target Curve for Virtual Spatial Design (가상 공간 디자인을 위한 3차원 목표곡선을 이용한 곡면 변형)

  • Kwon, Jung-Hoon;Lee, Jeong-In;Chai, Young-Ho
    • Journal of KIISE:Software and Applications
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    • v.33 no.10
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    • pp.868-876
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    • 2006
  • 2D input data have to be converted into 3D data by means of some functions and menu system in 2D input modeling system. But data in 3D input system for virtual spatial design can be directly connected to the 3D modeling data. Nevertheless, efficient surface modeling and deformation algorithm for the 3D input modeling system are not proposed yet. In this paper, problems of conventional NURBS surface deformation methods which can occur when applied in the 3D input modeling system are introduced. And NURBS surface deformation by 3D target curves, in which the designer can easily approach, are suggested. Designer can efficiently implement the virtual spatial sketching and design by using the proposed deformation algorithm.

3D modeling of Korean Traditional House based on BIM for Uploading to Spatial Information Open Platform (공간정보 오픈플랫폼 탑재를 위한 한옥의 BIM 기반 3차원 모델링 연구)

  • Kim, Kyeong-Min;Kim, Chan-Yong;Choi, Yun-Woong;Cho, Gi-Sung
    • Journal of Cadastre & Land InformatiX
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    • v.44 no.2
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    • pp.91-101
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    • 2014
  • This study tried to create 3D object with LOD3 level for Korean traditional house which is atypical structure, upload to spatial information open platform and confirm the possibility for creating 3D-map. And this study tried to create 3D model for Korean traditional house based on BIM, performed 3D modeling for interior spatial information of Korean traditional house and confirm the development possibility of 3D modeling and visualization method of Korean traditional house. Also this study present the possibility of LOD4 level visualization for spatial information of Korean traditional house which is atypical structure, but 3D object with LOD4 level can't be uploaded to Spatial Information Open Platform currently, cause by data volume limitation of spatial information open platform.

Evaluation on Practical Use of Raw Data for 3D Indoor Space Modeling (3차원 실내공간 모델링 원시자료의 활용도 평가)

  • Kim, Yun Ji;Yoo, Byoung Min;Lee, Jiyeong
    • Spatial Information Research
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    • v.22 no.6
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    • pp.33-43
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    • 2014
  • As the number of people who live indoor space has been increased, the interest in 3D indoor spatial information has been grown. Object-Oriented 3D indoor space modeling including indoor spatial information has performed in level of detail 4, and modeling data is able to be constructed based on various raw data which are as-built drawing, laser scanning, BIM data, and camera. 3D indoor space modeling has been worked based on established indoor space modeling process, and the result can be used for various application fields such as indoor space pedestrian navigation, facility management, disaster management, and so on. However, the modeling process has limitations to perform indoor space modeling efficiently, because the process is complicated and wastes time at modeling work. In this paper, we propose evaluation on practical use of raw data for 3D indoor space modeling purpose on supporting efficient indoor space modeling through analyzing the established process. Therefore, we define the requirements to evaluate the practical use of raw data and propose the verification method. In addition, as-built drawing which has been used in Seoul 3D indoor space modeling project will be applied to proposed method as a raw data.

Basic Research for Construction Indoor Digital Twin Construction (건설공사 실내 Digital Twin 구축을 위한 기초연구)

  • Kim, Young Hyun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2023.05a
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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.

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Efficient 3D Modeling Automation Technique for Underground Facilities Using 3D Spatial Data (3차원 공간 데이터를 활용한 지하시설물의 효율적인 3D 모델링 자동화 기법)

  • Lee, Jongseo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.25 no.11
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    • pp.1670-1675
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    • 2021
  • The adoption of smart construction technology in the construction industry is progressing rapidly. By utilizing smart construction technologies such as BIM (Building Information Modeling), drones, artificial intelligence, big data, and Internet of Things technology, it has the effect of lowering the accident rate at the construction site and shortening the construction period. In order to introduce a digital twin platform for construction site management, real-time construction site management is possible in real time by constructing the same virtual space. The digital twin virtual space construction method collects and processes data from the entire construction cycle and visualizes it using a 3D model file. In this paper, we introduce a modeling automation technique that constructs an efficient digital twin space by automatically generating 3D modeling that composes a digital twin space based on 3D spatial data.

Applicability of Flash LADAR to 3D Spatial Information Acquisition on a Construction Site;Performance Review (건설 산업에서의 3차원 공간 모델링을 위한 플래시 레이다의 적용성 검토에 관한 연구)

  • Son, Hyo-Joo;Kim, Chang-Wan;Yoo, Ji-Yeon;Kim, Hyoung-Kwan;Han, Seung-Heon;Kim, Moon-Kyum
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2007.11a
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    • pp.909-914
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    • 2007
  • Today's dynamic nature of the construction environment requires management systems to be active enough to take real-time decisions. For real-time decision making, effective 3D spatial information acquisition is imperative. Various 3D data acquisition technologies are being developed and tested for 3D spatial information acquisition and its use for wide range of areas in the construction industry, however, there are shortcomings in these technologies. The major problems are long processing time and high cost which make current technologies impossible to be used for real-time applications. Laser-based Flash LADAR that illuminates the entire scene with diffuse laser light is comparatively fast and cost effective, therefore it is well suited for 3D spatial modeling of dynamic environment on a construction site. This paper presents experimental results to evaluate the performance of flash LADAR and discuss issues of applicability of Flash LADAR to 3D spatial modeling on a construction site.

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Development of a Parametric Design System for Membrane Structures (연성 막구조의 파라메트릭 설계 시스템 개발)

  • Choi, Hyun-chul;Lee, Si Eun;Kim, Chee Kyeong
    • Journal of Korean Association for Spatial Structures
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    • v.16 no.4
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    • pp.29-36
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    • 2016
  • The objective of this research is to development of a parametric design system for membrane structures. The parametric design platform for the spatial structures has been designed and implemented. Rhino3D is used as a 3D graphic kernel and Grasshopper is introduced as a parametric modeling engine. Modeling components such as structural members, loading conditions, and support conditions are developed for structural modeling of the spatial structures. The interface module with commercial structural analysis programs is implemented. An iterative generation algorithm for design alternatives is a part of the design platform. This paper also proposes a design approach for the parametric design of Spoke Wheel membrane structures. A parametric modeling component is designed and implemented. SOFiSTik is examined to interact with the design platform as the structural analysis module. The application of the developed interface is to design optimally Spoke Wheel Shaped Ductile Membrane Structure using parametric design. It is possible to obtain objective shape by controlling the parameter using a parametric modeling designed for shape finding of spoke wheel shaped ductile membrane structure. Recently, looking at the present Construction Trends, It has increased the demand of the large spatial structure. But, It requires a lot of time for Modeling design and the Structural analysis. Finally an optimization process for membrane structures is proposed.

A Novel 3D Modeling Technique by Spatial Tiling of the Pre-defined Cubical Grids (정의된 육면 격자의 공간 타일링에 의한 3차원 모델링)

  • Nam, Sang-Hun;Chai, Young-Ho
    • 한국HCI학회:학술대회논문집
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    • 2008.02a
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    • pp.103-108
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    • 2008
  • In case of the 3D Sketch System for spatial modeling, The use of 3D input devices in 3D environment is the best method to express designer's intention. However, the designer's 3D drawing skill is not accurate. 80, we use the multiple strokes used generally by 2D sketch. Multiple strokes make the designer recognize model's current drawing features and what he change We use the cubic-based drawing method to calculate many surfaces in real time. We arrange the relations of cubes for composing surfaces and multi strokes. We implement the sketch system taking cubic modeling and multiple strokes technique.

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FOFIS : Forest Fire Information Systems (FOFIS: 산불 정보 시스템)

  • 지승도
    • Journal of the Korea Society for Simulation
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    • v.8 no.2
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    • pp.13-28
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    • 1999
  • The main purpose of this paper is to design and implement forest fire information system (FOFIS) for effective prevention of forest fire using GIS, database, 3-D graphics, and simulation techniques. In contrast to conventional fire information systems that are mostly based on the 2-D graphics and analytic modeling approaches, we have proposed the cell-based modeling approaches, i.e., spatial, data, and simulation modeling approaches. The cell-based spatial modeling is proposed by eliminating the cliff effect of the typical elevation model so that it can provide realistic 3-D graphics of the forest fire. The cell-based data modeling of geography, meteorology, and forestry information is also proposed. The cell-based dynamic modeling for forecasting of the fire diffusion is developed using the variable structure modeling techniques. Several simulation tests of FOFIS performed on a sample forest area of Chungdo, Kyungsangbukdo will demonstrate our approaches.

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Realistic Building Modeling from Sequences of Digital Images

  • Song, Jeong-Heon;Kim, Min-Suk;Han, Dong-Yeob;Kim, Yong-Il
    • Proceedings of the KSRS Conference
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    • 2002.10a
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    • pp.516-516
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    • 2002
  • With the wide usage of LiDAR data and high-resolution satellite image, 3D modeling of buildings in urban areas has become an important research topic in the photogrammetry and computer vision field for many years. However the previous modeling has its limitations of merely texturing the image to the DSM surface of the study area and does not represent the relief of building surfaces. This study is focused on presenting a system of realistic 3D building modeling from consecutive stereo image sequences using digital camera. Generally when acquiring images through camera, various parameters such as zooming, focus, and attitude are necessary to extract accurate results, which in certain cases, some parameters have to be rectified. It is, however, not always possible or practical to precisely estimate or rectify the information of camera positions or attitudes. In this research, we constructed the collinearity condition of stereo images through extracting the distinctive points from stereo image sequence. In addition, we executed image matching with Graph Cut method, which has a very high accuracy. This system successfully performed the realistic modeling of building with a good visual quality. From the study, we concluded that 3D building modeling of city area could be acquired more realistically.

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