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Pan-Tilt-Zoom 카메라를 이용한 파노라마 배경 생성과 객체 추적
백인호(Inho Paek),임재현(Jaehyun Im),박경주(Kyoungju Park),백준기(Junki Paik) 대한전자공학회 2008 電子工學會論文誌-SP (Signal processing) Vol.45 No.3
본 논문은 전 방향을 감시할 수 있는 Pan-Tilt-Zoom(PTZ) 카메라를 이용한 파노라마 배경 생성과 객체 추적 방법을 제안한다. 제안된 방법은 연속되는 두 영상의 외곽 영역에서 미리 정한 지역만 위상정합(phase correlation)을 하여 카메라의 지역 움직임을 빠르게 추정하고 벡터 양자화를 통하여 움직임 추정 오차를 최소화 한다. 추정된 움직임 값을 이용하여 겹침 영역이 존재하는 영상들을 획득하여 실린더에 투영시키고 영상을 재 정렬함으로써 파노라마 배경 영상을 생성할 수 있다. 객체 추적은 미리 생성된 파노라마 배경과 입력 영상의 차분 방법을 이용하여 배경과 객체를 분리하고 객체의 움직임을 추적한다. 제안된 객체 추적 방법은 PTZ 카메라를 이용하여 빠르고 안정적인 배경 생성이 가능하고, 전방향의 객체를 지속적으로 추적하는 것이 가능하다. 제안된 방법은 실시간 처리가 가능하며 넓은 감시 지역에서 객체의 형태를 추적하거나 얼굴인식과 같은 분야에서 이용될 수 있을 것이다. This paper presents a panorama background generation and object tracking technique using a Pan-Tilt-Zoom camera. The proposed method estimates local motion vectors rapidly using phase correlation matching at the prespecified multiple local regions, and it makes minimized estimation error by vector quantization. We obtain the required image patches, by estimating the overlapped region using local motion vectors, we can then project the images to cylinder and realign the images to make the panoramic image. The object tracking is performed by extracting object’s motion and by separating foreground from input image using background subtraction. The proposed PTZ-based object tracking method can efficiently generated a stable panorama background, which covers up to 360 degree FOV. The proposed algorithm is designed for real-time implementation and it can be applied to many commercial applications such as object shape detection and face recognition in various surveillance video systems.
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최문찬(Moonchan Choi),백인호(Inho Paik),백준기(Joonki Paik),김형기(Hyunggi Kim) 중앙대학교 문화콘텐츠기술연구원 2006 다문화콘텐츠연구 Vol.2 No.-
본 연구의 최종 목적은 인간의 마음을 움직일 수 있는 감각자극 즉, 내적 이미지와 연결된 시각과 청각에 관한 자극과 그것을 표출해 내는 시스템 구현에 관한 연구이다. 사용자가 이 시스템 앞에 서서 작동을 주도 하는 동안 시스템은 사용자의 성격과 취향에 대한 데이터베이스와 동기화된 시, 청각적 이미지들로 마음을 움직이거나, 사용자가 원하는 어떤 행동을 유발할 수 있는 정신작용의 과정에 관여하는 것들을 불러 일으킬 수 있다. 인간은 감각, 감정, 정서, 욕구 등에 관한 종합적인 개념인 감성, 그리고 판단과 식별능력인 이성을 통해 외부의 세계로부터의 자극을 분석, 종합, 개념화, 추상화 하재 된다. [1] 이와 같은 정신작용 속에 일어나는 상기, 상상, 사고 등의 심상작용을 촉진 시키거나 관여하여 의도된 심상작용을 유도할 수 있는 감각 자극이 개입 된다면, 인간의 마음을 움직이는 일에 대한 항해의 키를 잡을 수 있다고 본다. The final goal of this study is realization of the system which can move human's mind. In other words, it can express stimulate about light sense and auditory sense linking the mental images of human being. While user lead system to be operated in front of this system, it makes emotions to move by synchronized light sense and auditory sense images and database about user's character and liking, or arouse which is relative to mental process derived some behavior which use's wants. Human can analyze, synthesize, generalize and abstract stimulate from general phenomena through the reason which is judgment and distinguish ability and general idea of synthesize like sense, feeling, emotion, desire. If sense stimulation that can promote mental image action of remembrance that happen within such mentality, imagination, thinking etc. or motive intended mental image action because being concerned is intervened, see that can catch key of sailing about work that move human's mind.
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차량 동역학 제어기를 위한 노면 마찰계수 및 차체 미끄럼각 추정기 설계
박기홍(Kihong Park),허승진(Seung-Jin Heo),백인호(Inho Paik),이경수(Kyongsu Yi) 한국자동차공학회 2001 한국 자동차공학회논문집 Vol.9 No.2
The VDC(Vehicle Dynamics Control) is a control system whose target is to improve vehicle stability under critical lateral motion. The system has a good potential of becoming a standard active safety unit in passenger vehicles since it can be implemented on top of the ABS/TCS system with little extra cost. This, however, is possible only when the signals that the VDC system demands can be obtained with sufficient accuracy. In this research, estimators for the road friction coefficient and body sideslip angle have been designed. The two variables have great influence upon performance of the VDC system but not directly measurable. For the estimator design, the Newton method and the nonlinear observer theory have been exploited. The performance of the estimator have been verified via simulations on critical driving conditions.
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허승진(Seung-Jin Heo),박기홍(Kihong Park),이경수(Kyongsu Yi),나혁민(Hyuck-Min Na),백인호(Inho Paik) 한국자동차공학회 2000 한국 자동차공학회논문집 Vol.8 No.5
The VDC(Vehicie Dynamics Control) is a control system whose target is to improve stability of a vehicle under lateral motion. A lateral vehicle motion, especially on a slippery road, can lead to a hazardous situation, and the situation can even worsen by the driver's inappropriate response. In this paper, two VDC systems, a fuzzy-based controller and an LQR-based controller have been developed. The controllers take as input the yaw rate and the sideslip angle of either body or rear wheel, and they yield the direct yaw moment signal by which the vehicle can gain stability during cornering. Simulations have been conducted to evaluate the performance of the control systems. The results indicated that the controllers can successfully improve vehicle stability under potentially dangerous driving conditions.
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주요우울증 환자의 TRH 검사 반응과 신체 증상관의 관계
백인호,이규환,어경선 大韓神經精神醫學會 1994 신경정신의학 Vol.33 No.4
Objects: This study was dwsigned for the wvaluation of the association between the TRH stimulation test response and somatic symptoms in the patients with major depression. Methods: The subjects were consisted of 26 depressed patients. They received a TRH stimulation test. Their alexithymic trend were assessed with SSPS and their subjective wymptoms were assessed with SAS and SDS at least 1 week before the test. The frequency of their somatic symptoms were evaluated through interview using the symptom list in the somatization disorder in DSM-Ⅲ-R. The subjects were divided into the blunted response group and the non-blunted response group according to the response of TRH stimulation test and the frequency of their somatic symptoms, alexithymic trend and subjective symptoms were compared between the two groups. Results: 1)There were no significant difference of sex, age and the score of current GAF(global assessment of functioning) between the blunted response group and the non-blunted response group. 2)The score of SSPS was significantly higher in the blunted response group than that in the non-blunted response group statistically(P=0.035). There were no significant difference in two self-report scales. 3)Abdominal discomforts(P=0.039) and back pain(P=0.019) were significantly higher in the blunted response group than those in the non-blunted response group. Conclusion: These results suggested that alexithymic trend, especially the score of SSPS. and some somatic symptoms such as abdominal discomforts and back pain may influence the results of TRH stimulation test in depressed patients.
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