• 대한전자공학회논문지
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• 제25권7호
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• pp.807-818
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• 1988

This paper proposes new algorithms for the estimation of displacement vector and moving object extraction using difference picture. First, the relations between the boundary of moving objects in two consecutive image and the boundary of difference picture regions are analyzed, then displacement vector estimation algorithm is proposed. Using the estimated displacement vector, moving objects are directly extracted from difference picture. Since the proposed algorithms do not process gray-valued image, they have a short processing time and are suitable to real time processing. From the experimental results, we observed that, if difference picture is wel extracted, the proposecd algorithms work well even in the circumstances of complex background, fast or slow motion, rotation etc., including occlusion where is not moving area.

• 한국산학기술학회논문지
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• 제11권3호
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• pp.873-879
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• 2010

본 논문에서는 MPEG2(Moving Picture Expert Group 2)비디오 디코더에서 영상데이타를 디코딩하는 기술에 관한 것으로, 종래의 동여상 처리기에서는 허프만 코드화 처리를 하여 정지영상을 부호화한후 분할기반 부호화 방식의 동영상 처리기법을 사용하였으나 1프레임의 코드화시에도 많은 계산 알고리즘이 필요하고 이미지의 닮음정도를 객관적수치로 표현할 수 없으므로 비슷한 이미지를 중복 코드화 작업 및 전송 작업을 하는 결함이 있었다. 본 눈문에서는 이를 해결하기 위하여 이미지의 닮음정도를 수치화하고 기준값 이하의 영상은 코드화 작업을 하지않고 계산된 영상 변화값에 의해 구현된 영상으로 대체하여 저장 및 전송하도록 하여 시각적으로 전혀 거부감이 없는 동영상을 구현하였다.

• 대한전기학회논문지:전력기술부문A
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• 제48권12호
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• pp.1589-1598
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• 1999

Conventional MSE or PSNR based methods for objective picture quality assessment of moving picture coder are not well correlated with subjective human evaluation. In recent years, the design of better objective quality assessment has attracted much intention and several picture quality metrics based on the properties of Human Visual System has been proposed. This paper proposes new metric which is appropriate for objective picture quality assessment of block based moving picture coder by considering frequency sensitivity, inter-intra channel masking and several distortion artifacts caused by block based coding. The experimental results show that the proposed method is good correlated with subjective assessment.

• 전자공학회논문지 IE
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• 제47권3호
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• pp.1-6
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• 2010

본 논문에서는 문자나 그래픽 같은 매우 간단한 메시지만을 표출하고 있는 소형 LED 전광판에서도 동영상이 표출될 수 있도록 임베디드 시스템을 이용한 프로세서를 설계하였다. 구현 방법으로는 임베디드 시스템에서 출력되는 24Bit의 디지털 동영상을 표출할 수 있도록 하기위하여 비디오 프로세서와 LED Display Panel을 설계한 동영상 LED 전광판을 제작하였다. 감마 보정, 밝기, 색 대비조정, 스케줄 기능, 인터넷에 의한 표출영상 변환 및 저장장치를 내장하였으며, 그래픽, 동영상 등을 소형LED 전광판에서 표출할 수 있도록 Windows CE 기반의 응용 프로그램을 설계하였다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2000년도 추계학술발표논문집 (하)
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• pp.1051-1054
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• 2000

IMT-2000 moving picture messaging service is a primary auxiliary connection service that allows a caller to leave a message when the caller can not complete the call. As the number of service subscriber for wireless communication is dramatically increased, various wireless services as well as simple connection service are requried IMT-2000 moving picture messaging service increases the call completion rate and makes it possible to provide various services.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.289-291
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• 2003

Railway takes an important role of transporting massive passenger and freight. Accidents which occur related to trains have a risk of serious loss of lives, so those accidents need to be controlled urgently Therefore moving picture transmission system is required which transmits exact information of moving picture of accident status to CTC and also communication line is also required with it. By using WTB line as a wayside transmission line, railway telephones, fax and train service information are provided to local offices. As transmission line improving project, optical cabling work is being processed by phases. Therefore optical fiber line is more effective way for a communicating way between stations than coaxial transmission line. This Paper considers connecting method when optical fibers is used for moving picture data transmission of train accidents and its problems.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1039-1042
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• 2008

We propose a novel method to measure moving picture quality of display. This method simulates human visual system based on CSF (Contrast Sensitivity Function). And it evaluates moving picture quality of display on the image captured by pursuit camera. The results from this method are correlated with human visual perception test very well.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 B
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• pp.1412-1414
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• 2004

Railway takes an important role of transporting massive passenger and freight. Accidents which occur related to trains have a risk of serious loss of lives, so those accidents need to be controlled urgently. Therefore moving picture transmission system is required which transmits exact information of moving picture of accident status to CTC and also communication line is also required with it. By using WTB line as a wayside transmission line, railway telephones, fax and train service information are provided to local offices. As transmission line improving project, optical cabling work is being processed by phases. Therefore optical fiber line is more effective way for a communicating way between stations than coaxial transmission line. This paper consider's connecting method when optical fibers is used for moving picture data transmission of train accidents and its problems.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.1465-1467
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• 2004

Compared with other transport means, safety and timeliness are the merits of railways. Unexpectedly when accident happens, much time and human strength are required to cope with the accident. And for swift recovery, systematic rehabilitation is needed. Recently using MTS(Moving picture Transmission System), we can perform accident rehabilitation and recording work efficiently. MTS is the device that transmits continuous picture information from accident field to control center. e are developing the appropriate system to railway situation to make use of the existing information communication technology, processing technology of video-tex, super high speed transmission technology through fiber-optic, copper cable and network description of information Technology, etc. If these communication-based can technologies are applied to railway system, railway managers can control the accident by inspecting the picture of accident field and can contribute to the safe train operation and the improvement of railway management. In this paper, we investigate the connecting methods when optical fiber is used for moving picture data transmission of train accidents, and its problems. And, we validate MTS's performance through about 28km section of field test.

• 한국지능시스템학회논문지
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• 제23권2호
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• pp.184-189
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• 2013

본 논문에서는 인터넷 및 인터넷 저장 공간에 제한없이 유통되고 있는 유해동영상을 필터링하기 위해 유해동영상에 포함된 특정 소리를 이용한 유해 동영상 필터링 시스템을 제안한다. 이를 위하여 소리의 특성을 잘 표현할 수 있는 Gaussian Mixture Model을 이용하였으며, 필터링 대상 데이터와 소리모델과의 유사도를 계산하기위해 프레임단위 유사도 추정을 이용하였다. 또, 실시간 처리를 위하여 비교대상 데이터의 수를 줄임으로서 실시간 처리가 가능한 프루닝 방법을 적용하였으며, 고정도의 구별 성능을 위하여 기존 화자식별에서 우수한 성능을 보였던 MWMR 방법을 적용하였다. 식별실험결과, 일반 영상과 유해 영상의 기준인 전체프레임 대비 유사도 높은 프레임의 비를 50%로 설정한 경우, 판별 오류율은 6.06%였으며, 프레임 비의 기준이 60%인 경우, 오류율은 3.03%를 나타내어 소리를 이용한 유해동영상 필터링 시스템이 효과적으로 일반영상과 유해영상을 구별할 수 있는 것을 확인하였다.