• 제목/요약/키워드: Chongju

검색결과 778건 처리시간 0.029초

A Background Initialization for Video Surveillance

  • Lim Kang Mo;Lee Se Yeun;Shin Chang Hoon;Kim Yoon Ho;Lee Joo Shin
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2004년도 학술대회지
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    • pp.810-813
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    • 2004
  • In this paper, a background initialization for video surveillance proposed. The proposed algorithm is that the background images are sampled n frames during ${\Delta}t$ All Sampling frames are divided by $M{\times}N$ size block every frame. Average values of pixels for same location block of the sampling frames during ${\Delta}t$t are taken. then the maximum intensity $\alpha$ and the minimun intensity $\beta$ is obtained, respecticely. The intial by $M{\times}N$ size block, then average intensity $\eta$ of pixels for the block is obtained. If the average intensity $\eta$ is out of the initial range of the background image, it is decided the moving object image, and if the average intensity $\eta$ is included in the initial range of the background image. it is decided the background image. To examine the propriety of the proposed algorithm in this paper, the accuracy and robustness evaluation results for human and car in the indoor and outdoor enviroment. the error rate of the proposed method is less than the existing methods and the extraction rate of the proposed method is better than the existing methods.

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의사결정규칙을 이용한 아동의 교육용 인터넷 게임 활용실태 분석 (Analysis on the Usage of Internet Games for Children with Decision Tree Rules)

  • 김용대;정희석;최은정;박병선;한정혜
    • 정보교육학회논문지
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    • 제5권3호
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    • pp.389-400
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    • 2001
  • 인터넷 게임은 인터넷의 등장과 함께 급속하게 보급된 형태로 사용자가 이용하기 쉽고 게임의 종류가 다양하고 재미있다는 점에서 현재 학교현장에서 실시되고 있는 ICT 교육에 효과적인 교육방법으로 응용될 수 있다. 따라서, 본 연구에서는 ICT 교육에 활용될 수 있는 여러 자원 중 인터넷 게임에 대하여 아동들의 인터넷 게임 사용실태를 분석하고, 데이터 마이닝의 의사결정나무를 통하여 아동의 컴퓨터 사용에 따른 인터넷 게임에 대한 패턴을 도출하며, 또한 교사들의 활용실태를 조사함으로써 인터넷 게임 개발 필요성과 이를 초등 ICT 교육에 보다 효과적으로 적용할 수 있는 실증적 방향을 제시하였다.

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실리콘 기판을 이용한 Ku-band용 Band Pass Filter 설계에 관한 연구 (Study on a design of Band Pass Filter C-band using silicon substrate)

  • 이태일;최명률;박인철;김홍배
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.1
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    • pp.219-222
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    • 2003
  • In this paper, we designed a Ku-band BPF(Band Pass Filter) by microstrip line that most usually used a microwave device design and fabrication. Here a substrate of designed BPF were silicon substrate(${\varepsilon}_r=11.8$), and metal line was copper and silver/copper structure. And a configration of BPF was used hairpin pattern. A center frequency of designed BPF was 10GHz and their FBW(Fractional Band Width) was 20%(2GHz). It presented simulated results obtained for a 10GHz filter which yields an insertion loss of 0.1dB that ripple value related chebyshev reponse. Finallt we tried to make that a 30dB attenuation frequency was 20% of center frequency.

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