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RISS 인기검색어
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- 저자 : 지의경(Eui-Kyung Ji) (검색결과 3 건)
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지의경,한민홍,Ji, Eui-Kyung,Han, Min-Hong 한국융합신호처리학회 2007 융합신호처리학회 논문지 (JISPS) Vol.8 No.2
In this paper, we propose the method and system which determines the condition for safe and unsafe lane changing. To determine the condition, first, the system sets up the Region of Interest(ROI) on the neighboring lane. Second, a dangerous vehicle is extracted during the line changing. Third, the condition is determined to wm or not by calculating the moving direction, relative distance md relative velocity. To set up the ROI, the only one side lane is detected and the interested region is expanded. Using the coordinate transformation method, the accuracy of the ROI raised. To correctly extract the vehicle on the neighboring lane, the Adaptive Background Update method and Image Segmentation method which uses the feature of the travelling road are used. The object which is extracted by the dangerous vehicle is calculated the relative distance, the relative velocity and the moving average. And then in order to ring, the direction of the vehicle and the condition for safe and unsafe is determined. As minimizes the interested region and uses the feature of the travelling road, the computational quantity is reduced and the accuracy is raised and a stable result on a travelling road images which demands a high speed calculation is showed. 본 논문은 주행 차량의 차선 변경 시, 위험 여부를 판단하는 방법을 제안하고 시스템을 구현한다. 차선 변경의 위험 여부를 판단하기 위해서 첫째, 변경하고자 하는 차선에 관심 영역(ROI)을 설정해야 하고 둘째, 변경할 차선으로 자차가 이동할 때 자차에 위험이 될 차량을 정확하게 추출해야 하며 셋째, 추출된 차량의 방향과 상대 속도, 상대 거리를 계산하여 운전자에게 위험 경보를 울릴지에 대한 여부를 판단해야 한다. ROI를 설정하기 위해서 영역의 한 축이 되는 차선을 잡고 이를 기준으로 영역을 확장시켰는데 좌표 변환 기법을 이용하여 정확성을 높였다. 변경 차선의 정확한 차량 추출을 위하여 적응 배경화면 갱신 모델 기법과 주행 도로의 특징을 이용한 영상의 영상 분할 방법을 이용하였다. 위험 차량으로 추출된 물체는 자차(自車)와의 상대거리, 상대 속도를 계산하고 픽셀 좌표 이동을 일정시간 평균을 내어 방향을 알아내어 위험으로 판단 시 경보를 울리도록 하였다. 제안한 알고리즘은 영역을 최소화하고 도로와 차량의 특징을 이용함으로써 정확도를 높이고 계산량을 줄여 빠른 연산을 요구하는 주행 차량의 영상에서 안정적인 결과를 얻을 수 있었다.
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지의경(Eui-Kyung Ji),한민홍(Min-Hong Han) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper suggests algorithm about lane recognition using Circular queue and Gradient Method which is one of Operations Research technique. Characteristic of the proposed theory is first, making it easy to search lane by joining broken lane using Circular queue. Second, recognizing lane by applying Gradient Method on the previously improved image is effective in decreasing computing speed greatly and keeping frame number stably. Because this method does not use convolution algorithm of using mask that is presented mainly in existing.
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지의경(Eui-Kyung Ji),성준용(Jun-Yong Sung),한민홍(Min-Hong Han) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper describes a remote control system which is used the WiBro for an autonomous vehicle. A communication between the autonomous vehicle and a remote control center is possible with the WiBro. The autonomous vehicle sends the road image which it acquires from the camera to the remote control center through the WiBro. The control center sees the road image and controls the model wheel that is connected with a RS232 communication in the PC of the remote control center. Then it returns the steering angle of the wheel to the autonomous vehicle through the WiBro. The autonomous vehicle sends the steering angle to the wheel controller and then moves the wheel as much as received steering angle. This research solved the communication distance problem that has been indicated as a limitation in the vehicle communication environment. This system controls the autonomous vehicle which is located long distance from the remote control center by the method which is proposed. Also using the feature of the WiBro that is based on IP network, a voice communication function added to the communication system. With this voice communication function, the autonomous vehicle system can request the controlling of the autonomous vehicle's driving or send the problem of the driving situation to the remote control center. So it could be possible to raise the reliability of the vehicle's driving.
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