• Proceedings of the Computational Structural Engineering Institute Conference
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• 2009.04a
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• pp.360-363
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• 2009

토목구조물의 설계 패러다임이 2차원에서 3차원으로 전환될 때 효율성과 재활용성의 관건이 되는 기술적 제약사항이 호환성이다. 대부분의 캐드 엔진이 형상모델 수준에서 호환성 혹은 연계성을 지원하고 있지만 3차원 정보모델에서 요구하는 정보모델의 호환성은 지원하고 있지 않은 실정이다. 이 논문에서는 콘크리트 박스 교량에 대해서 3차원 교량 정보 모델을 구성하고 건설 프로세서에서 이를 활용할 수 있는 방안을 시범적으로 적용한 사례를 정리하였다. 적용 대상 구조물은 FSM 공법으로 시공되는 경간 40미터의 콘크리트 박스거더 교량이다. 견적, 시공시뮬레이션, 해석 등의 프로세서의 요구사항을 반영한 분류체계에 따라 형상모델의 체계를 정의하고 각각의 형상모델 단위에 정보를 부여하는 방식을 사용하였다. 개별 프로세서를 위한 솔류션에서 이러한 형상과 정보가 연계된 내용을 받아들이거나 캐드 엔진에서 필요한 형태로 내보내는 방식을 모두 시도하였다. 3차원 형상 모델과 시간이 부여된 4D 시뮬레이션을 활용하여 공사 스케쥴에 따라 모델 레이어 분류 작업으로 공사 진행 단계가 가상으로 보여진다. 시범 적용을 통해서 가상건설 시스템의 구성하는 개별 솔류션 혹은 정보체계에 대한 문제점과 개선사항을 도출하였다.

• Fashion & Textile Research Journal
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• v.17 no.4
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• pp.613-625
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• 2015

This research was conducted to provide basic data to improve expressivity required for virtual clothing to replace actual clothing. For the experiment, 6 materials were selected and 12(2 kinds of length) actual flared skirts were made. At the same time, simulations were carried out on OptiTex Runway 12.0 for 36(12 kinds of skirts $\times$ KES, FTU, KES weight/10) kinds of virtual flared skirts, which were applied with the measured property values (thickness, weight, bending, shear, friction, and stretch). Also, the study compared and analyzed the wearing images, silhouette overlapping images, and skirt length measurements of the actual and virtual skirts put on a dummy. As a result, the actual skirts showed clear distinction for each material. In contrast, virtual 1 and 2 expressed fabric 3 in the most similar way, but could not recreate the uniform, soft, and natural flare shape of the actual skirts in general. Virtual 3 formed natural flares as those of the actual skirts, and expressed fabric 1, 5, and 6 in a similar way. However, virtual 3 had too much volume and barely showed any distinction for each material. All of virtual 1, 2, and 3 expressed different flare shapes on the front and back sides of the skirt similarly to the actual skirts, and had a good visual expression for the color and texture of the materials. However, they could not effectively express the elasticity and fabric sagging in the bias direction.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.20 no.4
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• pp.399-404
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• 2002

In this study, it was intended to present solution for learners to understand and utilize photogrammetry more easily using economic medium except expensive measuring equipment. For this, 3D point data was analysed by generating event to stereo image on monitor, and input to CAD system automatically. so, real time vector editing and drawing with coordinates measurement were possible. The system was verified, and the monitoring for real construction was performed. so, it is expected to be utilized as a practical use software in related fields.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.10a
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• pp.500-503
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• 1997

In this paper, a method for recognizing 3-D objects using the 3-D Hough transform and the robust stereo vision is studied. A 3-D object is recognized through two steps; modeling step and matching step. In modeling step, features of the object are extracted by analyzing the IGES file. In matching step, the values of the sensed image are compared with those of the IGES file which is assumed to location and orientation in the 3-D Hough transform domain. Since we use the 3-D Hough transform domain of the input image directly, the sensitivity to the noise and the high computational complexity could be significantly allcv~ated. Also, the cost efficiency is improved using the robust stereo vision for obtaining depth map image which is needed for 3-D Hough transform. In order lo verify the proposed method, real telephone model is recognized. Thc results of the location and orientation of the model are presented.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.32B no.9
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• pp.1171-1180
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• 1995

In this paper, we present a 3-D object recognition system in which the 3-D Hough transform domain is employed to represent the 3-D objects. In object modeling step, the features for recognition are extracted from the CAD models of objects to be recognized. Since the approach is based on the CAD models, the accuracy and flexibility are greatly improved. In matching stage, the sensed image is compared with the stored model, which is assumed to yield a distortion (location and orientation) in the 3-D Hough transform domain. The high dimensional (6-D) parameter space, which defines the distortion, is decomposed into the low dimensional space for an efficient recognition. At first we decompose the distortion parameter into the rotation parameter and the translation parameter, and the rotation parameter is further decomposed into the viewing direction and the rotational angle. Since we use the 3-D Hough transform domain of the input images directly, the sensitivity to the noise and the high computational complexity could be significantly alleviated. The results show that the proposed 3-D object recognition system provides a satisfactory performance on the real range images.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.123-130
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• 2007

본 논문에서는 기존 패턴캐드시스템 및 드레이핑시스템을 이용한 의복제작과정의 한계점과 개선가능성에 대해 알아보고, 이를 기반으로 새로 디자인한 의복제작시스템을 소개한다. 이 시스템은 원피스, 바지, 셔츠, 재킷 등 옷의 큰 스타일인 의복템플릿으로부터 의복디자인을 시작 한다. 소매, 카라, 포켓, 넥라인과 같은 템플릿 디테일들은 디자이너가 마음대로 다른 세부 템플릿들과 교체할 수 있으며, 세부 템플릿으로 커버할 수 없는 디테일한 수정은 3D 드레이핑 시스템과 2D패턴에디터에서의 직관적인 오퍼레이션을 통해 이루어진다.

• Journal of Power System Engineering
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• v.16 no.3
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• pp.57-63
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• 2012

본 논문은 작업공간상에서 로봇 운동과 힘의 통합제어를 구현할 수 있는 플랫폼의 구현에 초점을 두고 있다. 조립 또는 디버링 같은 접촉작업에서의 매니플레이터 효율성 제고나 친 인간 환경에서의 휴머노이드 로봇의 안정성을 위해서는 종래의 PID 제어나 관절공간상에서의 CTM(Computed Torque Method) 제어보다는 작업공간상에서의 운동과 힘의 통합제어를 실시해야 한다. 이것을 위해서는 작업공간상에서의 엔드이펙트(end-effector, E-E)에 대한 동역학식과 자코비안(jacobian)을 도출해야 하며 이를 위해서는 각종 동적파라미터의 정확한 동정이 중요하다. 본 논문에서는 3D CAD 모델링, MATLAB, 동역학 시뮬레이터를 활용하여 로봇 모델링, 동역학식과 동적 파라미터 추출, 운동과 힘의 실시간 통합제어 시뮬레이션등을 쉽고 일관되게 진행할 수 있는 플랫폼을 구현하였고 적용예로써 JS-10로봇을 택해서 그 효용성을 입증하였다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.1475-1478
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• 2003

This paper introduces the development of design capabilities for air cylinders and jig bases in a three-dimensional jig design system for automobile body assembly. We first built the standard part library for these parts, and then developed the dedicated 3D design capabilities based on the Unigraphics system. By using this 3-D jig design system, design can be performed more intuitively, and verification and simulation of design results can be done more easily as the 3-D design result can be used readily for virtual manufacturing simulation.

• Korean Institute of Interior Design Journal
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• no.29
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• pp.257-264
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• 2001

To propose the construction of architectural interior design and communication using graphic, web3D, it was studied the kind and character of various representation methods that can be embodied in an architectural interior design on the web, and looks into whether these ways can be adapted to an architectural interior design process. Especially, the use of the current techniques on graphic and CAD data give the most suitable effect by using the integrated data such as vector animation, an interaction of object VR(Virtual Reality), a high quality of panorama VR, and data treatment and its interaction of drawing of cad data. As a result, the single data format shows not only one image representation but also a stream of continuous operation through a change into another format. But this desired study expects that another next studies will go on interaction and integration of digital format with increase of transmission speed expected in the future, and a digital model and its practical methods.

• Journal of the Korean Society of Costume
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• v.65 no.1
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• pp.104-117
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• 2015

Recently, the fashion industry has been integrating with The IT industry in order to develop in various ways. This study looks into ways to utilize the 3D CAD system, which would reduce time and cost while producing samples, and strengthen the communication between the brand and its cooperators by deploying knit designs using Knit CAD system's 3D virtual clothing program. The research method was reference, Internet resources 3D fashion CAD system and 3D Knit CAD system. Based on the data, simulation of the complete design of 4 deployed knit designs was done by using 3D virtual clothing program of the Knit CAD system utilizing knit design elements. One of each design element among the virtual clothing designs was chosen to produce real clothing, and the experts did verification on the appearance assessment of 3D virtual clothing knit designs of the Knit CAD system. As a result, 3D virtual clothing knit design of the Knit CAD system proved itself as an efficient system in terms of time and cost.