• 한국멀티미디어학회논문지
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• 제6권6호
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• pp.1062-1070
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• 2003

본 논문에서는 자동 추적 시스템을 이용하여 반자연적인 조건에서 화학 약물의 아치사량 투석에 반응하는 수중 생물중 하나인 물고기(송사리)의 행동을 관찰하였다. 결과의 분석을 위하여, 약물 투여 전의 대표적인 행동을 패턴 A로 정의하였으며, 약물 투여 후의 대표적인 행동을 패턴 B로 정의하였다. 실험 결과, 패턴 B가 약물 투여 후에 빈번하게 관찰되는 반면, 패턴 A는 약물 투여 전에 많이 관찰되었다. 또한, 물고기의 움직임 패턴을 자동으로 탐지하기 위하여 대표 패턴들을 인공신경망의 학습을 위하여 추출하였다. 독성 물질(다이아지논) 투여 후 패턴 B에 대한 평균 탐지율은 크게 증가하였으나, 패턴 A에 대한 탐지율은 크게 감소함을 볼 수 있었다 본 논문에서는 지표종의 행동 모니터링을 통하여 환경에서 독성 물질의 존재를 탐지하는 방법으로 인공 신경망의 적용을 보여주고 있다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제7권1호
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• pp.58-65
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• 2007

Behavioral sequences of the medaka (Oryzias latipes) were continuously investigated through an automatic image recognition system in response to medaka treated with the insecticide and medaka not treated with the insecticide, diazinon (0.1 mg/l) during a 1 hour period. The observation of behavior through the movement tracking program showed many patterns of the medaka. After much observation, behavioral patterns were divided into four basic patterns: active-smooth, active-shaking, inactive-smooth, and inactive-shaking. The "smooth" and "shaking" patterns were shown as normal movement behavior. However, the "shaking" pattern was more frequently observed than the "smooth" pattern in medaka specimens that were treated with insecticide. Each pattern was classified using classification methods after the feature choice. It provides a natural way to incorporate prior knowledge from human experts in fish behavior and contains the information in a logical expression tree. The main focus of this study was. to determine whether the decision tree could be useful for interpreting and classifying behavior patterns of the medaka.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1993년도 추계학술대회
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• pp.81-84
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• 1993

Artificial Heart Valve is the one of the most important artificial organ which has been implanted to many patients. The most important problems related to the artificial heart valve prosthesis are thrombosis and hemolysis. Usual method to test against this problem in vivo experiment, which is complex and hard work. Nowadays the request for In vitro Artificial Heart Valve testing system is increasing. Several papers has announced us flow pattern of Artificial Heart Valve is highly correlated with thrombosis and hemolysis. They usually gel flow pattern by LDA, it is also hard work and has narrow measuring region. In this reason we have determined to develop PTV(Particle Tracking Velocimetry). By using High-speed camera and image processing technique, flow pattern could be relatively easily obtained. Parachute and Bileaflet Artificial Heart Valve designed by SNU were testified.

• 방송공학회논문지
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• 제7권1호
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• pp.2-9
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• 2002

최근에 TV 방송에서 가상스튜디오나 가상캐릭터와 같은 가상현실(VR: Virtual Reality) 기술이 자주 사용되고 있으며 증강현실 (AR: Augmented Reality) 기술에 대한 관심도 높아지고 있다. 본 논문에서는 증강현실 기술을 방송에 응용한 가상스크린 시스템에 대해 소개한다. 가상스크린 시스템은 움직이는 색상패턴 패널을 추적하여 실시간으로 그 위에 동영상을 합성하는 증강영상 시스템이다. KBS 기술연구소에서는 가상스크린 시스템을 개발하고 'K-비전'이라 이름지었다. 이 시스템은 사용자가 들고 움직이는 패널에 동영상이나 그래픽 영상 등을 보여줄 수 있는데, 보여지는 모든 영상은 카메라의 움직임과 패널의 움직임에 따라 정확하게 입혀진다. 패널 추적을 위하여 블럽 분석(blob analysis)이나 특징 추적(feature tracking)과 같은 영상처리 기술을 이용한다. K-비전은 모든 타입의 카메라와 사용 가능하며. 특별한 부가장치가 필요하지 않다. 센서를 부착하지 않아도 되고. 캘리브레이션(calibration) 과정 또한 필요하지 않다. K-비전은 선거개표 방송. 다큐멘터리, 오락 프로그램 등 생방송 프로그램에서 활용한다.

• Journal of Biosystems Engineering
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• 제38권1호
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• pp.1-8
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• 2013

Purpose: Path planning and tracking algorithms applicable to various agricultural operations, such as tillage, planting, and spraying, are needed to generate steering angles for auto-guidance tractors to track a point ahead on the path. An optimal coverage path algorithm can enable a vehicle to effectively travel across a field by following a sequence of parallel paths with fixed spacing. This study proposes a path generation and tracking algorithm for an auto-guided Korean tractor with a tillage implement that generates a path with C-type turns and follows the generated path in a paddy field. A mathematical model was developed to generate a waypoint path for a tractor in a field. This waypoint path generation model was based on minimum tractor turning radius, waypoint intervals and LBOs (Limit of Boundary Offsets). At each location, the steering angle was calculated by comparing the waypoint angle and heading angle of the tractor. A path following program was developed with Labview-CVI to automatically read the waypoints and generate steering angles for the tractor to proceed to the next waypoint. A feasibility test of the developed program for real-time path tracking was performed with a mobile platform traveling on flat ground. The test results showed that the developed algorithm generated the desired path and steering angles with acceptable accuracy.

• 한국실내디자인학회논문집
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• 제22권1호
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• pp.174-182
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• 2013

This study divided the observation area in an indoor space for area setup to analyse the effect of the difference of design types on the characteristics of observation with the observed time of each area as objects. Though it is thought that the difference of design patterns may be influenced by the factors and material composing the space, no existing approaches have had any quantitatively measuring method. Eye-tracking could be efficiently utilized for observation analysis from the viewpoint of dating observation behavior. The followings are the results of analysing the observation characteristics depending on design pattern. First, 5 observing areas were set up according to concentration of observation time in order for the concentration by area to be examined and the factors of design having effect on the difference of observation patterns by design type could be analysed. Second, as a whole, the observation of modern types showed high observation characteristics. When the difference of observation characteristics by pattern was examined by difference at observation frequency, the observation frequency defined to be more than 50% was seen to be almost same from Area I to III and to get higher from Area IV, and that defined to be 30% was high at Areas III and IV. In Area V, it was very high at natural. Third, that of Area II is no more than 8.2% but had the most observation time. As for observation characteristics, the horizontal observation of the central part was the highest and had more observation frequency at modern type that at natural one. These observation characteristics by area enabled to analyse the observation tendency depending on design characters at relevant area. Fourth, the design factors composing natural type were found to bring more attention when the area showed higher concentration at natural type than at modern one. And the analysis of design factors could make it to be confirmed that the quality of material and background factors in addition to design factors in the area had more effect on sight concentration.

• 한국습지학회지
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• 제10권2호
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• pp.173-178
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• 2008

지리정보시스템(GIS)을 이용하여 멸종위기종 재두루미의 월동서식지인 한강하구역의 서식지 이용을 분석하였다. 한강하구역의 재두루미 서식지 이용경향을 검정하기위해 인공위성 추적(satellite tracking method)으로 구한 재두루미의 위치포인트(n=228)를 중심으로 반경 100 m, 200 m, 500 m 및 1 km의 버퍼를 설정하고 대분류 토지피복도의 7개의 서식지 항목에 대하여 분석을 실시하였다. 서식지이용에 대한 분석을 위해 카이제곱 검정을 실시한 결과 500 m버퍼까지는 서식지의 선택적 이용은 나타나지 않았으나 반경 1 km버퍼의 경우 서식지의 선택성이 나타났다.

• 한국인터넷방송통신학회논문지
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• 제18권2호
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• pp.157-162
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• 2018

의료시설 내에서 이동하고 있는 환자의 위치를 확인하는 것은 환자의 안전을 보장하고 의료서비스 질의 향상을 위해서 중요하다. 기존의 블루투스를 활용한 실내위치확인 시스템에서는 정확도 향상을 위해서 많은 사전 정보와 다수의 장치를 활용해야하는 문제가 있었다. 본 논문에서는 서로 다른 공간에 다른 패턴으로 비콘을 배치하고 동일한 수신신호강도를 갖는 비콘들을 그룹화하여 사전 정보 없이 소규모의 비콘만으로 공간을 인식하는 기법을 제안한다. 제안 기법에서는 인접 패턴간의 간섭을 고려하여 이를 최소화 할 수 있는 패턴 배치 기법을 연구했다. 또한 실험을 통해 제안 기법이 환자 위치 확인 시스템에 적용가능하다는 것을 검증하였다.

• 대한치과보철학회지
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• 제25권1호
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• pp.253-267
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• 1987

The purpose of this study was to improve limitations and disadvantages of the mechanical pantograph and the Visi-Trainer, and to design the reliable and reproducible device mandibular movement tracking device (MMTD) that is more simple, convenient and save the chair time than the mechanical pantograph and Visi-Trainer. MMTD was consist of head frame, horizontal bar, condylar path tracking stylus holders, anterior path tracking stylus holder, two condylar path plastic recording plates, one anterior path plastic recording plate, toggles and open occlusal clutch. To prove the reliability and reproducibility of MMTD, a five adults were selected and mandibular condylar movement was recorded one time by the mechanical pantographic tracing and MMTD. The border movement recording of the mandibular incisor (frontal, sagittal and horizontal) was also recorded by Visi-Trainer and the MMTD. The obtained results were as follows; 1. The condylar movement path (sagittal, horizontal) of the MMTD was not coincidence with that of mechanical pantograph. 2. Measurements of the angulation which established between working and balancing path records by use of the mechanical pantograph and MMTD, there was no significance. 3. In a view of MMTD's reproducibility, there was revealed almost similar recording pattern. 4. The border movement recording of the mandibular incisor by the MMTD and the Visi-Trainer showed almost same reliability and reproducibility. 5. The subjects were able to his original mandibular movements by use of open occlusal clutch in the MMTD.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.894-897
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• 2012

HOG(Histogram of Oriented Gradients)의 특징벡터를 이용하여 여러 객체가 움직이는 환경에서의 효과적인 개별객체 추적 방법을 제안한다. 알고리즘의 구성은 크게 영상의 전처리 과정, 객체검출, 객체추적으로 구성하였고, 다양한 궤적과 객체의 움직임을 갖는 6개의 동영상을 이용하여 실험하였다. 객체간에 겹치는 현상이 일어났을 때, 객체의 중심좌표와 예측좌표를 이용하여 개별 객체를 구분하였다. 제안한 시스템을 실험에 사용한 비디오에 적용한 결과 85.45%의 추적 성공률을 보였다. 제안한 시스템은 사물의 위치 및 움직임 패턴을 분석을 요하는 보안 시스템에 적용할 수 있을 것이다.