• Title/Summary/Keyword: 3-D modeling

Search Result 3,519, Processing Time 0.033 seconds

Analysis of Landscape Information and Web GIS Implementation of Using 3D Topographic Modeling (3차원 지형모델링에 의한 경관정보 분석과 Web GIS 구현)

  • Kim, Yong-Suk;Hong, Soon-Heon;Ok, Chi-Yul
    • The Journal of the Korea Contents Association
    • /
    • v.7 no.9
    • /
    • pp.204-211
    • /
    • 2007
  • In this study 3D topographic modeling was made by using aerial photography and digital terrain map, through this we did visibility analysis and implemented Web GIS of Dong-A university. Studying area was Busan Saha-gu Hadan-dong, we used aerial photography on a scale of 1:20,000 and digital terrain map on a scale of 1:5,000. Ortho correction image was made by aerial photography through selecting GCP, image matching, image resampling and precise differential rectification. And DEM on digital map was created using ArcView program, making 3D topographic modeling by road layer and building layer and implementing Web GIS about Dong-A university.

Mobile Panorama System via 3D Model Reconstruction (3차원 모델 재구성을 통한 모바일 파노라마 시스템)

  • Kim, Jin-Hee;Choy, Yoon-Chul;Han, Tack-Don;Lim, Soon-Bum
    • Journal of Korea Multimedia Society
    • /
    • v.14 no.8
    • /
    • pp.1094-1107
    • /
    • 2011
  • We can use panorama systems or image based modeling systems when we want to make 3D space model and look around result. Panorama systems make 3D model to stitch images and map cylinder or cube. The structure of 3D model, made by panorama system, is not same as structure of a real room, so user can't infer a real structure. Typically, Image based modeling systems work on a desktop computer. That makes it difficult to reconstruct 3D model in real time and take long time for processing. In this paper, we propose a 3D panorama modeling system that uses images on a mobile device. This system reconstructs a 3D space model, similar with a real room in real time, from multiple images captured part of rooms. Using this system, user can reconstruct various shape of space and look around a 3D space model.

Sell-modeling of Cylindrical Object based on Generic Model for 3D Object Recognition (3 차원 물체 인식을 위한 보편적 지식기반 실린더형 물체 자가모델링 기법)

  • Baek, Kyeong-Keun;Park, Yeon-Chool;Park, Joon-Young;Lee, Suk-Han
    • 한국HCI학회:학술대회논문집
    • /
    • 2008.02a
    • /
    • pp.210-214
    • /
    • 2008
  • It is actually impossible to model and store all objects which exist in real home environment into robot's database in advance. To resolve this problem, this paper proposes new object modeling method that can be available for robot self-modeling, which is capable of estimating whole model's shape from partial surface data using Generic Model. And this whole produce is conducted to cylindrical objects like cup, bottles and cans which can be easily found at indoor environment. The detailed process is firstly we obtain cylinder's initial principle axis using points coordinates and normal vectors from object's surface after we separate cylindrical object from 3D image. This 3D image is obtained from 3D sensor. And second, we compensate errors in the principle axis repeatedly. Then finally, we do modeling whole cylindrical object using cross sectional principal axis and its radius To show the feasibility of the algorithm, We implemented it and evaluated its accuracy.

  • PDF

Automatic 3D Facial Movement Detection from Mirror-reflected Multi-Image for Facial Expression Modeling (거울 투영 이미지를 이용한 3D 얼굴 표정 변화 자동 검출 및 모델링)

  • Kyung, Kyu-Min;Park, Mignon;Hyun, Chang-Ho
    • Proceedings of the KIEE Conference
    • /
    • 2005.05a
    • /
    • pp.113-115
    • /
    • 2005
  • This thesis presents a method for 3D modeling of facial expression from frontal and mirror-reflected multi-image. Since the proposed system uses only one camera, two mirrors, and simple mirror's property, it is robust, accurate and inexpensive. In addition, we can avoid the problem of synchronization between data among different cameras. Mirrors located near one's cheeks can reflect the side views of markers on one's face. To optimize our system, we must select feature points of face intimately associated with human's emotions. Therefore we refer to the FDP (Facial Definition Parameters) and FAP (Facial Animation Parameters) defined by MPEG-4 SNHC (Synlhetic/Natural Hybrid Coding). We put colorful dot markers on selected feature points of face to detect movement of facial deformation when subject makes variety expressions. Before computing the 3D coordinates of extracted facial feature points, we properly grouped these points according to relative part. This makes our matching process automatically. We experiment on about twenty koreans the subject of our experiment in their late twenties and early thirties. Finally, we verify the performance of the proposed method tv simulating an animation of 3D facial expression.

  • PDF

3D Earthwork BIM Design Process for a Road Project

  • Raza, Hassnain;Park, Sang-Il;Lee, Seung Soo;Tanoli, Waqas Arshad;Seo, Jongwon
    • Journal of KIBIM
    • /
    • v.7 no.2
    • /
    • pp.8-15
    • /
    • 2017
  • Building Information modeling is playing an important role in transforming the construction industry. It helped the industry with better visualization, minimum design errors, and excellent planning of the construction activities. Time and cost saving can be effectively achieved by using BIM for any construction project. It improves information exchange between all the project stakeholders. However, the development of earthwork 3D BIM is still underway and has not been fully implemented yet. This paper presents the study of a complete process for Earthwork BIM design using Autodesk Civil 3D. A real site road construction project is used as a case study to explain the process of earthwork modeling, starting from laser scanning to 3D model. Quantity take off calculation is very important part of any road construction project so during this study earthwork volume from two 3D earthwork model is calculated. The results obtained through this study will be the basis for future work which has been concluded in this paper.

Development of Multi-platform 3D Interactive Rural Landscape Simulator with Low-cost Web GIS and Game Engine (무료 Web GIS와 보급형 게임엔진을 이용한 다중플랫폼 3차원 인터랙티브 농촌경관 시뮬레이터 개발)

  • Lee, Sungyong;Kim, Taegon;Lee, Jimin;Suh, Kyo
    • Journal of Korean Society of Rural Planning
    • /
    • v.19 no.4
    • /
    • pp.177-189
    • /
    • 2013
  • 3D modeling and rendering technologies are getting more attention from landscape planners and architects because the virtual reality based on 3D graphic technology could give more realistic experience to landscape simulation users and boost promotional effects. The 3D landscape simulation, however, not only requires a lot of cost and time in production, but also demands efforts to distribute to consumers due to various computing environment of them. The purpose of this study is to suggest a process for developing an interactive 3D landscape simulator with low-cost, which can support multi-platform functionality in high quality through reviewing related current software and web services. We select GIMP for 2D image texturing, SketchUpfor 3D modeling, Unity for real-time rendering, and Google Earth for terrain modeling considering price and workability and apply the developed process for Windows, Web, and Android versions to test the applicability for Sangji-ri, Gosam-myeon, Gyeonggi-do, Korea.

Documentation of the History of Ok-Cheon Catholic Church by standardized 2D CAD and 3D Digital Modeling (표준화된 2D CAD와 3D Digital Modeling을 이용한 옥천천주교회의 연혁 기록)

  • Kim, Myung-Sun;Choi, Soon-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.12 no.1
    • /
    • pp.523-528
    • /
    • 2011
  • Ok-Cheon catholic church has been changed 4 times since it's first construction in 1955. Prior three changes were small ones of windows, doors, roof finish etc. but the last alteration was the extension of it's plan from 一 shape to long cross shape and along with it the size, structure and form of it changed. This history of the church has not been recorded in drawing but only in text with indistinct features not documented. This study makes a new 2D CAD files using layers matched the changes and 3D digital models, these have not only present information but also change informations of the church. They are useful data for effective management, conservation restoration or possible reuse of it.

3D Cloud Animation using Cloud Modeling Method of 2D Meteorological Satellite Images (2차원 기상 위성 영상의 구름 모델링 기법을 이용한 3차원 구름 애니메이션)

  • Lee, Jeong-Jin;Kang, Moon-Koo;Lee, Ho;Shin, Byeong-Seok
    • Journal of Korea Game Society
    • /
    • v.10 no.1
    • /
    • pp.147-156
    • /
    • 2010
  • In this paper, we propose 3D cloud animation by cloud modeling method of 2D images retrieved from a meteorological satellite. First, on the satellite images, we locate numerous control points to perform thin-plate spline warping analysis between consecutive frames for the modeling of cloud motion. In addition, the spectrum channels of visible and infrared wavelengths are used to determine the amount and altitude of clouds for 3D cloud image reconstruction. Pre-integrated volume rendering method is used to achieve seamless inter-laminar shades in real-time using small number of slices of the volume data. The proposed method could successfully construct continuously moving 3D clouds from 2D satellite images at an acceptable speed and image quality.

A Study on the 3D Object Representation based WebSD Using X3D (X3D를 이용한 WebSD기반 3D Object 표현에 대한 연구)

  • 이성태;김이선;기우용;이윤배
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.6 no.4
    • /
    • pp.632-638
    • /
    • 2002
  • Extensible 3D(X3D) is a software standard for defining interactive web and broadcast-based 3D content integrated with multimedia. The data size of Web3D representation based on polygon meshes is so large that transferring practical data fast is a hard problem. This paper proposes 3D object structure, a new framework for compact 3D representation with high quality surface shape. By utilizing a free form surface technique, qualified surface are transferred with limited amount of data size and rendered. 3D graphic structure can be regarded ad both polygon meshes and free form surfaces. Therefore, it can be easily integrated to existing Web3D data formats, for example VRML & XML. 3D object structure also enables modeling free form surface shapes intuitively with polygon modeling like operations.

AR based ornament design system for 3D printing

  • Aoki, Hiroshi;Mitanin, Jun;Kanamori, Yoshihiro;Fukui, Yukio
    • Journal of Computational Design and Engineering
    • /
    • v.2 no.1
    • /
    • pp.47-54
    • /
    • 2015
  • In recent years, 3D printers have become popular as a means of outputting geometries designed on CAD or 3D graphics systems. However, the complex user interfaces of standard 3D software can make it difficult for ordinary consumers to design their own objects. Furthermore, models designed on 3D graphics software often have geometrical problems that make them impossible to output on a 3D printer. We propose a novel AR (augmented reality) 3D modeling system with an air-spray like interface. We also propose a new data structure (octet voxel) for representing designed models in such a way that the model is guaranteed to be a complete solid. The target shape is based on a regular polyhedron, and the octet voxel representation is suitable for designing geometrical objects having the same symmetries as the base regular polyhedron. Finally, we conducted a user test and confirmed that users can intuitively design their own ornaments in a short time with a simple user interface.