• 인터넷정보학회논문지
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• 제5권5호
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• pp.79-91
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• 2004

본 논문에서는 음영합성 기법과 얼굴 인식 기술 중 특징추출 기법을 이용한 아바타 얼굴 자동생성 시스템을 제안한다. 제안하는 시스템은 사진으로부터 얼굴의 특징정보를 추출하여 사람의 얼굴과 유사한 아바타 얼굴을 자동으로 생성해 주는 시스템이며, 음영을 사진으로부터 추출하여 이를 각 이목구비 이미지와 합성하여 생성한다. 따라서 실사형에 좀 더 근접한 얼굴을 생성할 수 있다. 본 논문은 새로운 눈동자 추출 기법과 각 이목구비별 특징정보 추출 방법 그리고. 검색시간을 줄이기 위한 분류 방법, 유사도 계산에 의한 이미지 검색방법, 최종적으로 사진으로부터 음영을 추출하여 검색된 이목구비와 합성, 실사형 아바타 얼굴을 생성하는 방법을 제안한다.

• Journal of Korean Neurosurgical Society
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• 제51권2호
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• pp.120-123
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• 2012

Objective : Percutaneous vertebroplasty (PVP) is usually carried out under three-dimensional (2D) fluoroscopic guidance. However, operative complications or bone cement distribution might be difficult to assess on the basis of only 2D radiographic projection images. We evaluated the feasibility of performing an intraoperative and postoperative examination in patients undergoing PVP by using three-dimensional (3D) reconstructive C-arm. Methods : Standard PVP procedures were performed on 14 consecutive patients by using a Siremobil Iso-$C^{3D}$ and a multidetector computed tomography machine. Post-processing of acquired volumetric datasets included multiplanar reconstruction (MPR) and surface shaded display (SSD). We analyzed intraoperative and immediate postoperative evaluation of the needle trajectory and bone cement distribution. Results : The male : female ratio was 2 : 12; mean age of patients, 70 (range, 77-54) years; and mean T score, -3.4. The mean operation time was 52.14 min, but the time required to perform and post-process the rotational acquisitions was 7.76 min. The detection of bone cement distribution and leakage after PVP by using MPR and SSD was possible in all patients. However, detection of the safe trajectory for needle insertion was not possible. Conclusion : 3D rotational image acquisition can enable intra- or post-procedural assessment of vertebroplasty procedures for the detection of bone cement distribution and leakage. However, it is difficult to assess the safe trajectory for needle insertion.

• KIEAE Journal
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• 제14권4호
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• pp.35-45
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• 2014

The main objective of this study is to provide an effective algorithm of the transmitted solar radiation calculation through window glazing on a clear day. This algorithm would be used in developing a computer program for fenestration system analysis and shading device design. Various simulation methods have been evaluated to figure out the most accurate and effective procedure in estimation of transmitted solar radiation on a tilted surface on a clear day. Characteristics of simulated results of each step have been scrutinized by comparing them with measured results of the site as well as results from other simulation programs. Generally, the Duffie & Beckman's solar calculation method introducing the HDKR anisotropic model provided the most reliable simulation results. The DOE-2 program usually provided over-estimated simulation results. The estimation of extraterrestrial solar radiation and beam normal radiation were conducted pretty accurately. However, the solar radiation either on horizontal surface or on tilted surface involves complicated factors in estimation. Even though the estimation results were close to the real measured data during summer when solar intensity is getting higher, the estimation provided more error when solar intensities were getting weaker. The convex polygon clipping algorithm with homogeneous coordinates was fastest model in calculation of sunlight to shaded area ratio. It could not be applied because of its shape limitation.

• International Journal of Advanced Culture Technology
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• 제8권3호
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• pp.54-60
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• 2020

Online cybercrime has various causes. The criminal guilty language, Criminal lingo is active in the shaded area with the bilateral aspect of the word on cyber. It has been continuously producing massive risk factors in cyberspace. Criminals are shared and disseminated online. It has been linked with fake news and aids to suicide that has recently become an issue. Thus the criminal lingo has become a real danger factor on cyber interface. Recently, Criminal lingo is shared and distributed as cyber hazard information. It is transformed that damaging to the youth and ordinary people through the internet and social networks. In order to take action, it is necessary to construct an expert system based on AI to implement a smart management architecture with block-chain technology. In this paper, we study technically a new smart management architecture which uses artificial intelligence based decision algorithm and block-chain tracking technology to prevent the spread of criminal lingo factors in the evolving cyber world. In addition, through the off-line regular patrol program of police units, we proposed the conversion of online regular patrol program for "cyber harem area".

• Spatial Information Research
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• 제2권2호
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• pp.107-116
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• 1994

코로플레스 지도는 지리사상의 지역간 분포 특성을 시각적으로 표현하는 지도이다. CMS는 코로플레스 지도 제작 프로그램으로 1988년에 처음 개발되었다. 본 연구에서는 최근 변화된 컴퓨터 기술과 사용자 환경을 고려하여 이에 적합한 CMS ll를 개발하였다. CMS ll는 IBM PC AT또는 상위 기종에서 실행되며 DOS 5.0 이상의 운영환경과 최소 640KB 이상의 메모리가 필요하다. 그래픽 해상력과 색상을 고려하여 그래픽보드로 VGA를 사용하고 고해상도의지도를 출력하기 위해 HP 호환의 레이저 ? 프린터를 지원한다. 코로플레스 지도를 효과적으로 디자인하기 위해 메뉴와 지도의 제목과 범례 등을 한글화하였고 한자의 사용도 가능하도록 제작하였다. 속성자료의 호환을 위해 DBF형식을 이용하였다.

• 대한기계학회논문집A
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• 제20권11호
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• pp.3525-3537
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• 1996

This paper presents a CAD program develpoed on a microcomputer in order to support graphic and computational assessment of ergonomic problems associated with the design of a man-in-cab system. The program is coded to help workspace designers with ergonomic evaluations needed in the design stage. This paper proposed a biomechanical -ergonomic evaluations needed using man and workplace models. The human model is developed to have dimensions obtained from the Korean anthropometric data reported in 1992. Its graphical representation is based on a wire-frame model but, whenever necessary, body segments can be represented by a solid model with hidden line/faces removed and shaded. Workplace models are presented for cabs of the excavator, one of the most popular construction vehicles. A workplace model consists of an operator seat, a steering wheel. two control levers, two pedals, and a control panel. The workplace elements can be modified in their sizes, positions, and orientations by changing the reference point and design parameters. An algorithm for the view test is suggested and loaded to provide a visual evaluaiton of the overall layout of a workplace model.

• 아시안잔디학회지
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• 제13권3호
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• pp.159-170
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• 1999

Preference of chestnut brown chafer (CBC), Adoretus tenuimaculatus was examined from chestnut leaves which were treated with different light condition, temperature and nitrogen fertilization. More CBC was attracted to leaves which grown at $30^{\circ}C$ than grown at $20^{\circ}C$,$ 25^{\circ}C$ and in the field. When attracted number of CBC was compared among full sunlight-grown, cloth shaded-grown and dark-grown plants, 4.0 in full sunlight grown and 5.0 in dark-grown plants. Amount of nitrogen fertilizer did not influence CBC feeding. The attractiveness of undamaged leaves with non-feeding beetles, leaves with feeding damaged, and leaves with artificial damaged was compared in replicated laboratory trials by placing the treatments in the petri-dish and counted the number of beetles that landed on the plants after 6 hr treatment. The highest number of beetles was attracted to chestnut leaf with feeding damaged ($7.7\pm$0.6) than undamaged leaf with non-feeding beetles ($5.3\pm$0.6) and artificial damaged ($4.3\pm$0.6). Managnese content in the leaves of chestnut grown in shade cloth-grown condition was higher than that in the leaves of chestnut that had been exposed to full sunlight condition and dark condition, and feeding damaged leaf.

• 대한임베디드공학회논문지
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• 제11권5호
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• pp.313-323
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• 2016

With the development of autonomous vehicle, there has been active research on advanced driver assistance system for road marking detection using vision sensor and 3D Laser scanner. However, vision sensor has the weak points that detection is difficult in situations involving severe illumination variance, such as at night, inside a tunnel or in a shaded area; and that processing time is long because of a large amount of data from both vision sensor and 3D Laser scanner. Accordingly, this paper proposes a road marking detection and classification method using single 2D Laser scanner. This method road marking detection and classification based on accumulation distance data and intensity data acquired through 2D Laser scanner. Experiments using a real autonomous vehicle in a real environment showed that calculation time decreased in comparison with 3D Laser scanner-based method, thus demonstrating the possibility of road marking type classification using single 2D Laser scanner.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2005년도 춘계 종합학술대회 논문집
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• pp.491-495
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• 2005

가정의 정보가전기기의 소형화, 네트워크화에 따라 사용자에게 네트워크의 유연성, 이동성, 사용의 편리성을 제공해 주는 무선 홈네트워크에 대한 요구가 증대되고 있다. 그러나, 기존 무선 홈네트워크 시스템은 가정 내 장애물에 의한 음영 지역이 존재하며, 정적이고 제한된 서비스만이 가능하다. 본 논문에서는 이러한 무선 홈 네트워크 시스템의 문제점을 해결하기 위한 방법으로 Home Robot을 이용한 무선환경의 홈 네트워크 시스템을 제안한다.

• 로봇학회논문지
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• 제11권4호
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• pp.205-216
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• 2016

The localization of the robot is one of the most important factors of navigating mobile robots. The use of featured information of landmarks is one approach to estimate the location of the robot. This approach can be classified into two categories: the natural-landmark-based and artificial-landmark-based approach. Natural landmarks are suitable for any environment, but they may not be sufficient for localization in the less featured or dynamic environment. On the other hand, artificial landmarks may generate shaded areas due to space constraints. In order to improve these disadvantages, this paper presents a novel development of the localization system by using artificial and natural-landmarks-based approach on a topological map. The proposed localization system can recognize far or near landmarks without any distortion by using landmark tracking system based on top-view image transform. The camera is rotated by distance of landmark. The experiment shows a result of performing position recognition without shading section by applying the proposed system with a small number of artificial landmarks in the mobile robot.