• 한국의류산업학회지
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• 제11권2호
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• pp.308-314
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• 2009

In creating an avatar, consumers can find out for themselves their own sizes to be entered. Also, putting in a face creation main-page menu option enables clients to make up their faces and match them to their bodies. Through this process when purchasing clothes through the internet consumers can enter their own body sizes and create avatars that are identical to their body shape. The uniqueness of developed prototype is that it creates an avatar similar to one's body shape according to body size inputs and demonstrates visually to customers the on-line comfort test which was only available off-line traditionally. The avatar follows the movement of mouse from left to right which enables 3 dimensional visualization. Through maximizing the visual effect this research focuses on enabling consumers to feel subjective parts as if they are off-line. This study seeks to provide a type of prototype of an online shopping mall that meets the demand of the consumers using the 3D avatar.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 춘계학술대회논문집B
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• pp.673-679
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• 2000

LNG Carriers are currently known as sole commercial means of shipping natural gas on the sea. They are designed to proven dangerous explosion for shipping a lot of gas over long distance. In this study. In this study, a scaled model chamber was made to investigate ventilation characteristics of the hood room in LNG carrier. Experimental study was performed in model using visualization equipments with laser apparatus and image intensifier CCD camera gated by an AOM controller Twelve different kinds of measuring area were selected as experimental condition. Instant simultaneous velocity vectors at whole field were measured by using 2-D PIV system which software adopts two-frame grey-level cross correlation algorithm. To look into stagnation area of hood room for LNG carrier, a three-dimensional numerical simulation with standard ${\kappa}-{\varepsilon}$ model was carried out by using PHOENICS for three kinds of Reynolds number, $6.5{\times}10^3$, $9.7{\times}10^3\;and\;1.29{\times}10^4$, based on the cavity inlet velocity and cavity height. The flow pattern showed the large scale counter-clockwise forced-vortex rotated at center area, small eddies at each corner and stagnation area located at left-back upper side of model.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1997년도 추계학술대회
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• pp.137-141
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• 1997

In this study, in order to improve visualization and enhance the ability of the surgeon to perform delicate endoscopic surgery, three dimensional endoscopic system is designed. These 3D systems have our features of stereoendoscopic image processing: real time image capture and retrieve; presentation of left and right image on a single monitor; separable processing of the left and right eye images; coding of the 3D endoscopic video. For 3D endoscopic video coding, three approaches are presented based on interlaced picture structure, side-field format structure, and simulcast technique. Experimental results and performances comparisons are presented and analyzed or these approaches. Digital video coding techniques are presented or 3D endoscopic video sequences by means of an MPEG-2 video coding.

• 한국정밀공학회지
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• 제26권10호
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• pp.32-39
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• 2009

Most mobile devices provide limited input interfaces in order to maximize the mobility and the portability. In this paper, the author proposes a small cubic-shaped tangible input interface which tracks the location, the direction, and the velocity using MEMS sensor technology to overcome the physical limitations of the poor input devices in mobile computing environments. As the preliminary phase for implementing the proposed tangible input interface, the prototype design and implementation methods are described in this paper. Various experiments such as menu manipulation, 3-dimensional contents control, and sensor data visualization have been performed in order to verify the validity of the proposed interface. The proposed tangible device enables direct and intuitive manipulation. It is obvious that the mobile computing will be more widespread and various kinds of new contents will emerge in near future. The proposed interface can be successfully employed for the new contents services that cannot be easily implemented because of the limitation of current input devices. It is also obvious that this kind of interface will be a critical component for future mobile communication environments. The proposed tangible interface will be further improved to be applied to various contents manipulation including 2D/3D games.

• Current Optics and Photonics
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• 제6권6호
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• pp.565-575
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• 2022

In this paper, we propose a non-fungible token (NFT) transaction method that can commercialize the real 3D property and make property sharing possible using the 3D reconstruction technique. In addition, our proposed method enhances the security of NFT copyright and metadata by using optical encryption. In general, a conventional NFT is used for 2D image proprietorial rights. To expand the scope of the use of tokens, many cryptocurrency industries are currently trying to apply tokens to real three-dimensional (3D) property. However, many token markets have an art copyright problem. Many tokens have been minted without considering copyrights. Therefore, tokenizing real property can cause significant social issues. In addition, there are not enough methods to mint 3D real property for NFT commercialization and sharing property tokens. Therefore, we propose a new token management technique to solve these problems using integral imaging and double random phase encryption. To show our system, we conduct a private NFT market using a test blockchain network that can demonstrate the whole NFT transaction process.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.13-22
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• 2020

Reinforcement steel fixing is a skilled and manually intensive construction trade. Current practice for the quality assessment of reinforcement steel fixing is normally performed by fabricators and has high potential in having errors due to the tedious nature of the work. In order to overcome the current inspection limitation, this study presents an approach that provides visual assistance and inspection enhancement for inspectors to assess the dimensional layout of reinforcement steel fixing. To this end, this study aims to establish an end-to-end framework for rebar layout quality inspection using laser scanning and Augmented Reality (AR). The proposed framework is composed of three parts: (1) the laser-scanned rebar data processing; (2) the rebar inspection procedure integrating with AR; and (3) the checking and fixing the rebar layout through AR visualization. In order to investigate the feasibility of the proposed framework, a case study assessing the rebar layout of a lab-scaled formwork containing two rebar layers is conducted. The results of the case studies demonstrate that the proposed approach using laser scanning and AR has the potential to produce an intuitive and accurate quality assessment for the rebar layout.

• 디자인학연구
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• 제13권3호
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• pp.191-200
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• 2000

최근 미디어 형태의 변화와 컴퓨터 그래픽 기술의 발전으로 데이터베이스 정보의 삼차원 동적 표현의 시도가 이루어지고 있다. 그러나 그 정보를 표현함에 있어서의 방법과 널리 디자이너 사이에서 통용되어지는 사용 언어에 대하여 연구는 부족한 실정이다. 따라서 본 논문에서는 삼차원 동적인 정보표현의 방법은 어떠한 것이 존재하며 그리고 그 방법을 사용, 설명하기 위한 언어는 무엇이 있는가에 대해 조사 연구하였다. 연구는 크게 네 부분으로 구성되어진다. 먼저 문헌 연구를 통하여 이차원 정적인 정보 표현에서 삼차원의 동적인 정보 표현이 가능하게 된 정보표현의 기초와 그 기능들을 정리 소개하였다. 즉, 컴퓨터 이차원 화면 속에 어떻게 삼차원적인 표현이 가능한가와 컴퓨터 그래픽 기술의 발달로 어떤 기능이 개선되어 졌는가를 소개하였다. 그리고 두번째로 데이터베이스와 그래픽 모델 사이에 이 논문에서 논 하고자하는 정보표현 모델이 존재한다. 데이터베이스의 다이아그램 계층구조와 그래픽 모델을 설계할 때 만들어지는 씬그래프 계층구조 사이를 연결할 수 있는 정보 표현 구조 디자인 방법과 그 사용언어들에 대하여 제시하였다. 그리고 이 정보 표현 모델의 구조적 변화를 통해 어떻게 사용자가 필요한 정보를 관찰할 수 있는가를 논하였다. 세 번째로 그래픽 표현 기술을 분석하여 디자이너들이 그래픽 정보표현 모델 개발 시 참고 할 수 있는 정보 표현의 방법과 그 사용 언어들을 제시하였다. 마지막으로 구체적 사례 연구를 통하여 정보 표현 방법과 사용되어진 언어들의 예를 보이고 검증하였다.

• 한국의류학회지
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• 제40권4호
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• pp.746-762
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• 2016

This study considers expression techniques and aesthetic values in the images of head dress reflected in a natural motif. The conclusions of the study are as follows. The first type is the realistic expression (52.4%) such as the reproduction of a natural object's essential form (27.0%), the partial derivation of the natural object (19.3%), and the planarization for the actual image of the natural object (6.1%). The second type is a metaphorical expression (39.0%) which emphasizes the morphological characteristics of nature (18.2%), the structuration of the natural object's silhouette into a three-dimensional or two-dimensional form (11.5%), and the abstract expression of the form in the natural object (9.3%). The third type is a hybrid expression (8.6%) that is a compromise between practical (or metaphorical expressions) so that expression techniques represent a compromise between the natural object's essential form and abstract expression (4.6%) or the combination of the natural object's silhouette into a three-dimensional or a two-dimensional visualization (4.0%). Aesthetic head dress values reflected in the natural motif first indicate a primitive value. This state of natural instinct recreates the natural object or combines part of the biological elements of the natural object to create an inducement to escape from the practical world. The second is amusement in the expression of animals in dynamic and humorous forms creates an illusion of animals being alive with a representative playful enjoyment. The third is abstraction that grant freedom in the observer's aesthetic rational through a reinterpretation of the fashion designer. The fourth is eclecticism where a compromise represents an act of mixing a variety of independent factors to create harmony with the imagery of nature created through the grafting of diverse expression techniques that break away from stereotypes of existing natural objects to create a type of nature that cultivates new values.

• Archives of Plastic Surgery
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• 제47권5호
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• pp.428-434
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• 2020

Background Three-dimensional (3D) model printing improves visualization of anatomical structures in space compared to two-dimensional (2D) data and creates an exact model of the surgical site that can be used for reference during surgery. There is limited evidence on the effects of using 3D models in microsurgical reconstruction on improving clinical outcomes. Methods A retrospective review of patients undergoing reconstructive breast microsurgery procedures from 2017 to 2019 who received computed tomography angiography (CTA) scans only or with 3D models for preoperative surgical planning were performed. Preoperative decision-making to undergo a deep inferior epigastric perforator (DIEP) versus muscle-sparing transverse rectus abdominis myocutaneous (MS-TRAM) flap, as well as whether the decision changed during flap harvest and postoperative complications were tracked based on the preoperative imaging used. In addition, we describe three example cases showing direct application of 3D mold as an accurate model to guide intraoperative dissection in complex microsurgical reconstruction. Results Fifty-eight abdominal-based breast free-flaps performed using conventional CTA were compared with a matched cohort of 58 breast free-flaps performed with 3D model print. There was no flap loss in either group. There was a significant reduction in flap harvest time with use of 3D model (CTA vs. 3D, 117.7±14.2 minutes vs. 109.8±11.6 minutes; P=0.001). In addition, there was no change in preoperative decision on type of flap harvested in all cases in 3D print group (0%), compared with 24.1% change in conventional CTA group. Conclusions Use of 3D print model improves accuracy of preoperative planning and reduces flap harvest time with similar postoperative complications in complex microsurgical reconstruction.

• Journal of Yeungnam Medical Science
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• 제16권2호
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• pp.193-199
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• 1999

저자들은 다양한 진료 환경과 연구 수행에 폭 넓게 이용할 수 있는 새로운 온도측정 시스템을 개발하기 위하여 임상에서 필요한 기능과 연구에 요구되는 기능을 가진 간편하고 편리한 온도측정 시스템을 개발하였다. 이 측정 시스템은 일정한 지점의 온도를 정확하고 신속하게 측정하여 기록할 수 있는 장치로서 실용 가능성을 다양하게 검증해 본 결과 기존의 평면적인 열 분포도보다 진보된 등온곡선을 도출할 수 있었으며, 기존의 체온 측정장치보다 더욱 편리하게 진료의 각 분야에 효과적으로 이용할 수 있음을 확인하였다. 본 연구결과에 의한 기대효과 및 향후 활용방안으로는 1) 환자의 체온 변화를 신속하게 진단할 수 있어서 치료효과의 극대화와 부작용의 최소화에 기여할 수 있다. 2) 체온의 변화를 일으키는 다양한 질환의 진단 및 치료성과 판정에 이용할 수 있다. 3) phantom을 이용한 다양한 실험적 연구를 수행할 수 있다. 4) 장기 입원중인 환자들을 대상으로 중앙통제 방식으로 환자들의 상태를 지속적으로 감시할 수 있어서 간호인력의 노동력 절약에 많은 도움을 줄 수 있다. 5) 현재의 기능을 더욱 발전시키면 다양한 질환의 환자들에게 두루 적용할 수 있으며, 환자 감시체제를 위한 필수장비로 이용할 수도 있다.