• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2015년도 하계학술대회
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• pp.516-517
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• 2015

The automatic traffic sign detection and recognition has been one of the highly researched and an important component of advanced driver assistance systems (ADAS). They are designed especially to warn the drivers of imminent dangers such as sharp curves, under construction zone, etc. This paper presents a traffic sign recognition (TSR) system using morphological operations and multiple descriptors. The TSR system is realized in three stages: segmentation, shape classification and recognition stage. The system is designed to attain maximum accuracy at the segmentation stage with the inclusion of morphological operations and boost the computation time at the shape classification stage using MB-LBP descriptor. The proposed system is tested on the German traffic sign recognition benchmark (GTSRB) and on Korean traffic sign dataset.

• 한국항해항만학회지
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• 제34권9호
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• pp.693-698
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• 2010

In port and its approach channel, traffic accidents such as collision, aground, minor collision have reached about 77% of total marine casualty in the area. In this paper, an attempt to enhance the safe navigation was proposed by offering marine traffic supporting system which helps VTS operator assist vessel effectively with the quantitative assessment on difficulty of each vessel. The system collects navigation data from onboard AIS, assesses the data in assessment mode to analyze the navigation difficulties of each vessel and displays the degree of danger of each vessel on the ECDIS in real-time to decide the intervention time or order of priority for VTS operator. The effectiveness of the system was verified by the VTS operators in Korea.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2001년도 Proceeding of KIN-CIN Joint Symposium 2001 on Satellite Navigation/AIS, lntelligence , Computer Based Marine Simulation System and VDR
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• pp.65-74
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• 2001

The rapid development of computer technology and widely application of artificial intelligent provide technology support for realizing navigation automation on the sea. which has achieved great success in shipping advanced countries like japan, England, America, Germany and also in the developing country, China. However, it still remains in the studying Period up to now in aspects of collision avoidance decision-making mathematical model and reasoning mechanism. In this paper, approaches are proposed to establish the collision avoidance automation system. One of them is based on the former studies to realize automation system by make use of finite state machine theory and following the International regulations for Preventing Collision at Sea, 1972. The others are to establish the new idea about automatic collision avoidance system by taking advantage of the free flight idea, hybrid system, game theory used in air traffic management studies in recent years and the common characteristics in both air and sea traffic management.

• International Journal of Aeronautical and Space Sciences
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• 제13권3호
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• pp.377-385
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• 2012

The Automatic Dependent Surveillance Broadcast (ADS-B) system is a key component of CNS/ATM recommended by the International Civil Aviation Organization (ICAO) as the next generation air traffic control system. ADS-B broadcasts identification, positional data, and operation information of an aircraft to other aircraft, ground vehicles and ground stations in the nearby region. This paper explores the ADS-B based trajectory prediction and the conflict detection algorithm. The multiple-model based trajectory prediction algorithm leads accurate predicted conflict probability at a future forecast time. We propose an efficient and accurate algorithm to calculate conflict probability based on approximation of the conflict zone by a set of blocks. The performance of proposed algorithms is demonstrated by a numerical simulation of two aircraft encounter scenarios.

• Journal of information and communication convergence engineering
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• 제10권4호
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• pp.378-383
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• 2012

This paper presents the implementation of an automatic road sign recognizer for an intelligent transport system. In this system, lists of road signs are processed with actions such as line segmentation, single sign segmentation, and storing an artificial sign in the database. The process of taking the video stream and extracting the road sign and storing in the database is called the road sign recognition. This paper presents a study on recognizing traffic sign patterns using a segmentation technique for the efficiency and the speed of the system. The image is converted from one scale to another scale such as RGB to grayscale or grayscale to binary. The images are pre-processed with several image processing techniques, such as threshold techniques, Gaussian filters, Canny edge detection, and the contour technique.

• 한국항해항만학회지
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• 제38권3호
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• pp.203-209
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• 2014

As a sense of practical field, most researchers emphasize the importance of safety management to prevent marine accidents. The purpose of this paper is to develope a new safety evaluation method using Safety Index (SI) which is to measure the emotional feeling of navigation officer by traffic situations. In this study, the questionnaires with SI are used to investigate the degree of sensing levels of navigation officers according to the navigation situations. In addition, the traffic data obtained from AIS (Automatic Identification System) data are used to give actual situations in the questionnaire investigation. As results of questionaries investigations based upon the AIS data, it is shown that the Safety Index can be used as a criterion to determine the safety levels of ship navigating in a coastal areas.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(III)
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• pp.145-150
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• 2003

The national subway went under construction in 1971, and after three years of endeavor, Seoul subway line number one opened for traffic in 1974. Line number two went under construction in 1978 and it opened for traffic in 1984. With the use of safety operation for more than 20 years, the life cycle nearly came to an end. Therefore the improvements for the safety operation are unavoidable. The total system should not be affected when the new and conventional systems are overlapped, the system operation is in the initial stage, and it confronts the situation of abnormal operation. However, there is a total lack of experience in construction and improvement for the trains that are in the use of large transport and density headway. In this paper, we propose an improvement method of the subway signalling system using ATO (Automatic Train Operation control scheme) to which the latest Digital ATC is applied, and examine the first application model of ATO system.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2000년도 International Workshop for AIS / ECDIS / VTS Interface
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• pp.119-123
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• 2000

In this paper, authors introduce about Wide Range Vessel Traffic Service (VTS) system using Automatic Identification System (AIS). In order to develop the prototype of Wide Range VIS system, Korean satellite is used for data communication system for AIS. In this system, ship position obtained by using GPS is reported automatically to VTS center through Korean satellite. By using this system, VTS center can cover more wide area than the case using radar only. And the uncertainty of information is decrease. The results of test show the good possibility of VTS using satellite and AIS.

• 대한교통학회지
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• 제23권8호
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• pp.147-152
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• 2005

본 연구에서는 구간의 교통상황을 보다 정확하게 관측할 수 있는 기법 중의 하나인 차량자동인식기법(AVI, Automatic Vehicle Identification)의 성능 요구사항 (performance requirements)을 분석할 수 있는 기법을 처음으로 제시하였다. 미시적 교통시뮬레이터인 Paramics를 이용하여 개별차량의 재인식(re-identification)을 통한 AVI 성능요구사항 분석을 몬테카를로 시뮬레이션을 적용하여 구현하였다. 본 연구에서 제안한 기법은 목표로 설정한 통행시간의 정확도를 달성하기 위한 매칭률(matching rate)과 오매칭률(mis-matching rate)의 조합을 찾고, 나아가 이에 부합하는 AVI 기술을 선정하는데 사용될 수 있다. 본 연구에서 제안한 기법은 AVI를 통한 정확하고 신뢰성 있는 교통정보의 수집 및 가공을 위한 의사결정지원 수단으로 유용하게 사용될 것으로 기대된다.

• 한국정보통신학회논문지
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• 제3권4호
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• pp.715-722
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• 1999

본 연구는 노인복지정책을 위한 정보통신시스템을 어떠한 방향으로 개발해야 하는지를 분석하기 위해 연구하였으며, 연구방법으로는 문헌자료와 현장방문 면담조사를 병행하여 실시하였다. 문헌자료는 주로 이론적 배경을 중심으로 연구하였으며, 면담조사는 1999년 9월 15일에서 16일 양일간에 무작위적 방법에 의해 노인들을 면담하여 노인들이 지금 필요로 하는 것이 무엇인지를 파악하는데 이용하였다. 면담결과를 분석해 보면, 노인들이 가장 많이 요구하는 것이 경제적 요구 의료요구 주택요구ㆍ문화요구ㆍ교통요구ㆍ교육요구 순으로 나타내고 있다. 노인들의 요구에 의한 정보통신시스템의 개발은 경제적 요구에는 재택근무시스템ㆍ홈쇼핑시스템ㆍ홈뱅킹시스템이 필요하며, 의료요구에는 의료지원시스템ㆍ의료정보시스템ㆍ원격의료지원시스템, 주택요구에는 가정자동화시스템ㆍ인터넷시스템, 문화요구에는 이벤트정보시스템ㆍ여가정보시스템, 교통요구에는 자동교통지리시스템ㆍ자동운전시스템, 교육요구에는 원격교육시스템ㆍ지식학습지원시스템 등의 개발이 필요하다.