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단안 카메라를 이용한 Optical Flow 기반 자차 움직임 추정
양지혁(Ji-Hyuk Yang),하창우(Chang-Woo Ha),이준묵(Jun-Muk Lee) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
Vehicle localization and tracking method is an important component of driver assistance systems and autonomous vehicles, as it can be used for path planning and navigation. Traditional methods are often unreliable or too expensive to be commercialized. In this paper, we propose a real-time vehicle tracking method which uses just one camera. For single camera vehicle tracking, we compute optical flow data from the top view image and consequently derive motion information from this optical flow data. The proposed tracking method has advantages, as it is low price, real-time algorithm, and has reasonable accuracy. We show validity of the proposed method through some experiments.
에너지 분산 X선 분석장치가 장착된 투과전자현미경을 이용한 석면분석방법
한정희,김광진,정용현,이준연,이용묵,정호근,유일재 한국산업위생학회 2001 한국산업보건학회지 Vol.11 No.2
To establish and accurate asbestos analysis method for workplace samples, chrysotile, amosite, crocidolite, tremolite, actinolite, and anthophyllite asbestos fibers were analyzed for their morphology, atomic content and electron diffraction patterns. The morphology of asbestos fiber was evaluated in 10,000 ×magnification. The atomic contents was analyzed by a transmission electron microscopy with energy dispersive X-ray analyzer (TEM-EDX). Asbestos fivers were further assessed using electron diffraction(ED) patterns to provide an addtional criterion for classifying the asbestos fibers. Twenty asbestos fibers were initially randomly selected for morphological evaluation, based on an aspect ratio(length : diameter = 3:1). Then the fibers were determined for their EDX spectrums and ED patterns. Our results showed that only chrysotile fiber has a hollow tube structure to be distinguished from other asbestos fibers. Although asbestos fibers had similar morphology, they had different EDX spectrums and ED patterns. Our results on the atomic content of asbestos fibers were very similar to those of other researchers, but amosite and crocidolite had a little difference in atomic content compared with the results from other researcher. The difference may be due to the difference in equipment or asbestos sample selection. A study on asbestos samples from biological specimens to establish a criterion for determining occupational asbestos exposed diseases should be done in the near future.