• Title/Summary/Keyword: 3D 스캔데이터

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Human Limbs Modeling from 3D Scan Data (3차원 스캔 데이터로부터의 인체 팔, 다리 형상 복원)

  • Hyeon, Dae-Eun;Yun, Seung-Hyeon;Kim, Myeong-Su
    • Journal of the Korea Computer Graphics Society
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    • v.8 no.4
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    • pp.1-7
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    • 2002
  • This paper presents a new approach for modeling human limbs shape from 3D scan data. Based on the cylindrical structure of limbs, the overall shape is approximated with a set of ellipsoids through ellipsoid fitting and interpolation of fit-ellipsoids. Then, the smooth domain surface representing the coarse shape is generated as the envelope surface of ellipsoidal sweep, and the fine details are reconstructed by constructing parametric displacement function on the domain surface. For fast calculation, the envelope surface is approximated with ellipse sweep surface, and points on the reconstructed surface are mapped onto the corresponding ellipsoid. We demonstrate the effectiveness of our approach for skeleton-driven body deformation.

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Visualization of Structural Shape Information based on Octree using Terrestrial Laser Scanning (3D레이저스캐닝을 이용한 옥트리기반 구조물 형상정보 가시화)

  • Cha, Gichun;Lee, Donghwan;Park, Seunghee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.8
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    • pp.8-16
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    • 2016
  • This study presents the visualization of shape information based on Octree using 3D laser scanning. The process of visualization was established to construct the Octree structure from the 3D scan data. The scan data was converted to a 2D surface through the mesh technique and the surface was then converted to a 3D object through the Raster/Vector transformation. The 3D object was transmitted to the Octree Root Node and The shape information was constructed by the recursive partitioning of the Octree Root Node. The test-bed was selected as the steel bridge structure in Sungkyunkwan University. The shape information based on Octree was condensed into 89.3%. In addition, the Octree compressibility was confirmed to compare the shape information of the office building, a computer science campus in Germany and a New College in USA. The basis is created by the visualization of shape information for double-deck tunnel and it will be expected to improve the efficiency of structural health monitoring and maintenance.

A Study on a Walking Animation Using 3D Whole Body Laser Scanned Data (인체 전신 레이저 스캔 데이터를 대상으로 한 인체 보행 애니메이션 연구)

  • Yoon, Geun-Ho;Choi, Ran;Cho, Chang-Suk
    • Proceedings of the Korea Information Processing Society Conference
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    • 2011.04a
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    • pp.519-521
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    • 2011
  • 본 연구는 3D 레이저 스캔 방법으로 계측된 인체 데이터를 대상으로 3D 아바타 애니메이션 모듈 구현을 목표로 한다. 이를 위하여 인체의 뼈 골격계 기준점을 지정한다. 기준점을 이용하여 계층에 맞는 골격을 잡아 오브젝트를 이루고 있는 정점들과 그에 해당되는 골격들을 연결하고 기구학에 의한 행동패턴을 제작하여 아바타에 애니메이션을 적용 시킨다. 이를 위하여Visual C++ OpenGL 라이브러리를 이용 하였고 인체 전신 레이저 스캔 데이터를 대상으로 하였다.

A Study on the Setting of Breast Measurement Points on 3D Scan Data

  • Sohn, Boo-Hyun;Han, Hyun-Suk
    • Journal of the Korea Society of Computer and Information
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    • v.25 no.5
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    • pp.81-90
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    • 2020
  • In this paper, we propose setting measurement point in the 3D scan data based on the manual measurement data. The optimal 3D body scan postures and measurement points for automatic measurement of breast were set up. The outer breast point may be different depending on the body shape or standing posture as it is on the line connected from the bisecting point of the lateral waist thickness to front armpit point. Therefore, it is necessary to consider the breast-related outer point proposed in this study. And many researches need to reduce the differences between MAM and 3D dimension items associated with the upper breast point. When measuring depth, the difference by pressing in MAM should be taken into account. And the differences in flexion depending on breast type can make a difference in the 3D measurement. So the measurement method in 3D scan should be further studied depending on the types of breast and verified by multiple subjects.

A Measures to Implements the Conservation and Management of Traditional Landscape Architecture using Aerial Photogrammetry and 3D Scanning (전통조경 보존·관리를 위한 3차원 공간정보 적용방안)

  • Kim, Jae-Ung
    • Journal of the Korean Institute of Traditional Landscape Architecture
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    • v.38 no.1
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    • pp.77-84
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    • 2020
  • This study is apply 3D spatial information per traditional landscape space by comparing spatial information data created using a small drone and 3D scanner used for 3D spatial information construction for efficient preservation and management of traditional landscaping space composed of areas such as scenic sites and traditional landscape architectures. The analysis results are as follows. First, aerial photogrammetry data is less accurate than 3D scanners, but it was confirmed to be more suitable for monitoring landscape changes by reading RGB images than 3D scanners by texture mapping using digital data in constructing orthographic image data. Second, the orthographic image data constructed by aerial photogrammetry in a traditional landscaping space consisting of a fixed area, such as Gwanghalluwon Garden, produced visually accurate and precise results. However, as a result of the data extraction, data for trees, which is one of the elements that make up the traditional landscaping, was not extracted, so it was determined that 3D scanning and aerial surveying had to be performed in parallel, especially in areas where trees were densely populated. Third, The surrounding trees in Soswaewon Garden caused many errors in 3D spatial information data including topographic data. It was analyzed that it is preferable to use 3D scanning technology for precise measurement rather than aerial photogrammetry because buildings, landscaping facilities and trees are dense in a relatively small space. When 3D spatial information construction data for a traditional landscaping space composed of area using a small drone and a 3D scanner free from temporal and spatial constraints and compared the data was compared, the aerial photogrammetry is effective for large site such as Hahoe Village, Gyeongju and construction of a 3D space using a 3D scanner is effective for traditional garden such as Soswaewon Garden.

An analysis on the Fit Preferences of Breeches using 3D Lower Body Scan data (3차원 하반신 스캔데이터를 이용한 승마바지의 맞음새 분석)

  • Kang, Mi-Jung;Kwon, Young-Ah
    • Fashion & Textile Research Journal
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    • v.15 no.6
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    • pp.1000-1009
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    • 2013
  • Well-fitting riding breeches provide a comfortable ride. Horse-riding breeches should fit the lower body with patches located on the inside of hip and knees to prevent tears and slips. This study provides information about the fit of women's breeches using 3D human body scan data wearing commercially available two breeches according to posture. To get information about breeches fit, we measured the angle of waist line, the length, and the area of the breeches fit on four 20's women. This research showed the problem which was down for waist back line in the case of the horseback riding pose. The back waistline of the riding breeches should be raised compared to the front waistline; subsequently, an increased waistline angle results in less back waistline decrease. The breeches have plenty of length from back waist to crotch so the breech fit can be improved. The thigh circumference increased when riding in the front; therefore, good elasticity of the weft direction of the fabric is recommended. The length increase and the peripheral increase of the front knee significantly increased the surface area of the knee; consequently, knee patch material should be a two-way elastic fabric in all directions to enhance comfort according to riding motion.

Development of Men Slacks Pattern Using 3D Scan Data (3차원 인체형상 스캔데이터를 이용한 남자 바지패턴 설계)

  • Sohn, Boo-Hyun
    • Journal of the Korean Home Economics Association
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    • v.46 no.9
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    • pp.137-146
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    • 2008
  • This study was conducted in order to spread out lower body 3D scan data of men in their twenties. The aim was to achieve slacks pattern with ease allowance through comparison with existing flat patterns. For conversion of 3D scan data into 20 pattern, reference lines were established by using Rapid Foam in 3D shape analysis software. 2C-AN program and Yuka CAD were used to convert 20 pattern earned with straight posture of 3D scan data into slacks pattern by using Triangle Simplification & Runge-Kutta Method. In order to achieve this we needed to set a line 9cm below the hip line, to array vertex of each block to crease line while maintaining the horizontal line. And then we needed to set ease allowance in back crotch and to set waist circumference or hip circumference ease allowance in side seam of slacks. Results showed that long front crotch length can be achieved if 3D scan data is compared with 20 existing flat pattern. Slacks pattern that raise front crotch by about 1.5cm compared to back crotch and also possess ease allowance in back crotch area are great in appearance evaluation.

Identifying Considerations for Developing SLAM-based Mobile Scan Backpack System for Rapid Building Scanning (신속한 건축물 스캔을 위한 SLAM기반 이동형 스캔백팩 시스템 개발 고려사항 도출)

  • Kang, Tae-Wook
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.3
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    • pp.312-320
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    • 2020
  • 3D scanning began in the field of manufacturing. In the construction field, a BIM (Building Information Modeling)-based 3D modeling environment was developed and used for the overall construction, such as factory prefabrication, structure construction inspection, plant facility, bridge, tunnel structure inspection using 3D scanning technology. LiDARs have higher accuracy and density than mobile scanners but require longer registration times and data processing. On the other hand, in interior building space management, relatively high accuracy is not needed, and the user can conveniently move with a mobile scan system. This study derives considerations for the development of Simultaneous Localization and Mapping (SLAM)-based Scan Backpack systems that move freely and support real-time point cloud registration. This paper proposes the mobile scan system, framework, and component structure to derive the considerations and improve scan productivity. Prototype development was carried out in two stages, SLAM and ScanBackpack, to derive the considerations and analyze the results.

Data Reduction Method Based On Geometry and Color Variation For 3D Color Scan Data (형상 및 색상기반 3차원 컬러 스캔 데이터의 감소방법)

  • Kang EuiChul;Woo HyuckJe;Kim DuckBong;Lee KwanHeng
    • Proceedings of the Korean Information Science Society Conference
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    • 2005.11a
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    • pp.715-717
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    • 2005
  • 3차원 스캔 데이터는 물체의 형상정보를 표현하는 Euclidian 공간상의 점데이터의 집합으로 정의될 수 있으며. 복잡한 3D 컨텐츠 및 모델을 사실적이고 효율적으로 생성하기 위한 기초 정보로 사용된다 최근 3차원 스캐닝기술의 발전으로 고정밀도의 형상정보뿐만 아니라 색상정보의 획득이 가능해 졌으며, 데이터의 용량이 비약적으로 증가하였다. 본 논문에서는 기존의 형상기반 점데이터 감소 방법의 한계를 극복하기 위해 색상이 동시에 고려되는 효율적인 점데이터 감소방법을 제안한다.

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From TMJ to 3D Digital Smile Design with Virtual Patient Dataset for diagnosis and treatment planning (가상환자 데이터세트를 기반으로 악관절과 심미를 고려한 진단 및 치료계획 수립)

  • Lee, Soo Young;Kang, Dong Huy;Lee, Doyun;Kim, Heechul
    • Journal of the Korean Academy of Esthetic Dentistry
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    • v.30 no.2
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    • pp.71-90
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    • 2021
  • The virtual patient dataset is a collection of diagnostic data from various sources acquired from a single patient into a coordinate system of three-dimensional visualization. Virtual patient dataset makes it possible to establish a treatment plan, simulate various treatment procedures, and create a treatment planning delivery device. Clinicians can design and simulate a patient's smile on the virtual patient dataset and select the optimal result from the diagnostic process. The selected treatment plan can be delivered identically to the patient using manufacturing techniques such as 3D printing, milling, and injection molding. The delivery of this treatment plan can be linked to the final prosthesis through mockup confirmation through provisional restoration fabrication and delivery in the patient's mouth. In this way, if the diagnostic data superimposition and processing accuracy during the manufacturing process are guaranteed, 3D digital smile design simulated in 3D visualization can be accurately delivered to the real patient. As a clinical application method of the virtual patient dataset, we suggest a decision-making method that can exclude occlusal adjustment treatment from the treatment plan through the digital occlusal pressure analysis. A comparative analysis of whole-body scans before and after temporomandibular joint treatment was suggested for adolescent idiopathic scoliosis patients with temporomandibular joint disease. Occlusal plane and smile aesthetic analysis based on the virtual patient dataset was presented when treating patients with complete dentures.