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Efficient Approach for Face Detection in Video Surveillance

Journal of Donghua University(English Edition) 2003年第4期20卷 52-55页

作者：宋红石峰 Department of Computer Science and Engineering Beijing Institute of Technology Beijing 100081 China Department of Computer Science and Engineering Beijing Institute of Technology Beijing 100081 Chinaecurity access control systems and automatic video surveillance systems are becoming increasingly important recently and detecting human faces is one of the indispensable processes. In this paper an approach is presented to detect faces in video surveillance. Firstly both the skin-color and motion components are applied to extract skin-like regions. The skin-color segmentation algorithm is based on the BPNN (back-error-propagation neural network) and the motion component is obtained with frame difference algorithm. Secondly the image is clustered into separated face candidates by using the region growing technique. Finally the face candidates are further verified by the rule-based algorithm. Experiment results demonstrate that both the accuracy and processing speed are very promising and the approach can be applied for the practical use.

Security access control systems and automatic video surveillance systems are becoming increasingly important recently,and detecting human faces is one of the indispensable *** this paper,an approach is presented to detect faces in video ***,both the skin-color and motion components are applied to extract skin-like *** skin-color segmentation algorithm is based on the BPNN (back-error-propagation neural network) and the motion component is obtained with frame difference ***,the image is clustered into separated face candidates by using the region growing ***,the face candidates are further verified by the rule-based *** results demonstrate that both the accuracy and processing speed are very promising and the approach can be applied for the practical use.

关键词： face detection skin-color segmentation BPNN frame difference region growing

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Bilateral teleoperation over the internet: the time varying delay problem

Bilateral teleoperation over the internet: the time varying ...

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American control Conference (ACC)

作者： N. Chopra M.W. Spong S. Hirche M. Buss Coordinated Science Laboratory University of Illinois Urbana-Champaign Urbana IL USA Control Systems Group Faculty of Electrical Engineering and Computer Sciences Technical University Berlin Berlin Germany

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Stability and control of a physical class of 2D continuous-discrete linear systems using an LMI setting

Stability and control of a physical class of 2D continuous-d...

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American control Conference (ACC)

作者： K. Galkowski W. Paszke B. Sulikowski E. Rogers S. Xu J. Lam D.H. Owens Institute of Control and Computation Engineering University of Zielona Góra Poland Institute of Control and Computation Engineering University of Zielona Gόra Poland Department of Electronics and Computer Science University of Southampton UK Department of Mechanical Engineering University of Hong Kong China Department of Automatic Control and Systems Engineering University of Sheffield UK

In this paper we give new results on the analysis and control of differential linear repetitive processes, which are a distinct class of 2D linear systems of both systems theoretic and applications interest. The new results relate to stability and control in the presence of uncertainty in the process state space model. The family of control laws used has a well defined physical basis in terms of the underlying process dynamics.

关键词： control systems Linear systems Stability analysis Algorithm design and analysis automatic control Iterative algorithms Optimal control System testing control engineering computing computer science

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Evaluation of inhabitant's walking habit in intelligent space

Evaluation of inhabitant's walking habit in intelligent spac...

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Annual Conference of Industrial Electronics Society

作者： P.T. Szemes H. Hashimoto E. Voisan F. Dragan Institute of Industrial Science The University of Tokyo Tokyo JAPAN Integrated Intelligent Systems Laboratory Budapest University of Technology and Economics Budapest Hungary PRESTO Japan Science and Technology Agency Japan Faculty of Automation Control and Computer Science “Politehnica” University of Timisoara Timisoara Romania

In this paper, the intelligent space (iSpace) concept is applied for helping disabled or blind persons in crowded environments such as train stations, or airports. The main contribution of this paper is a general mathematical (fuzzy-neuro) description of obstacles avoidance method (walking habit) of moving objects (human beings) in a limited area scanned by the intelligent space. A mobile robot with extended functions is introduced as a mobile assistant robot, which is assisted by the iSpace. The mobile assistant robot (MAR) can guide and protect a blind person in a crowded environment with the help of the iSpace. The iSpace learns the obstacle avoidance method (walking habit) of dynamic objects (human beings) by tracing their movements. The learned walking habit is encoded in a mathematical structure and is sent to the control of MAR. control of MAR estimates the path of dynamical obstacles and helps to the blind person to avoid the collision. The prototype of the mobile assistant robot and simulations of some basic types of obstacle avoidance method (walking habit) are presented.

关键词： Legged locomotion Mobile robots Intelligent robots Intelligent actuators Intelligent sensors Orbital robotics Space technology Humans Robot sensing systems Intelligent agent

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controllability and optimization for differential linear repetitive processes

Controllability and optimization for differential linear rep...

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IEEE Conference on Decision and control

作者： S. Dymkou E. Rogers M. Dymkov K. Galkowski D.H. Owens Lehrstuhl B fur Mathematik RWTH Aachen Germany Department of Electronics and Computer Science University of Southampton Southampton UK Institute of Mathematics National Academy of Sciences of Belarus Minsk Belarus Institute of Control and Computation Engineering University of Zielona Góra Poland Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK

Differential linear repetitive processes are a class of continuous-discrete 2D systems of both systems theoretic and applications interest. The feature which makes them distinct from other classes of such systems is the fact that information propagation in one of the two independent directions only occurs over a finite interval. In this paper we develop an operator theory approach for the study of basic systems theoretic structural and control properties of these processes. In particular, we first develop a characterization of the range space of an operator generated by dynamics of the processes under consideration and use it to characterize a controllability property. Also we extend this operator setting to produce new results for a (again physically relevant) linear-quadratic optimization problem for these processes and the resulting optimal feedback control law.

关键词： controllability Optimal control control systems computer science Mathematics automatic control control engineering computing systems engineering and theory Character generation Feedback control

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Suppressing shock waves on the A1 in The Netherlands - Model calibration and model-based predictive control

Suppressing shock waves on the A1 in The Netherlands - Model...

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2003 IEEE International Conference on Intelligent Transportation systems, ITSC 2003

作者： Hegyi, A. Duy, D.N. De Schutter, B. Hellendoorn, J. Hoogendoorn, S.P. Stramigioli, S. Delft Center for Systems and Control Delft Univ. of Technology Mekelweg 2 Delft2628 CD Netherlands Transportation Planning and Traffic Engineering Section Fac. Civil Eng. and Geosciences Delft Univ. of Technology P.O. Box 5048 Delft2600 GA Netherlands Control Laboratory EL/CE Fac. of Electrical Eng. Mathematics and Computer Science Univ. of Twente P.O. Box 217 Enschede7500 AE Netherlands

ISBN: (纸本)0780381254

We now apply the model predictive control (MPC) of speed limits that we have presented in previous publications to a calibrated METANET model of a 19 km stretch of the real-world freeway A1 in The Netherlands. This freeway regularly suffers from shock waves originating mainly from on-ramps, and speed limits are now used to suppress these shock waves. First, we calibrate and validate the extended METANET model with data from the A1 freeway, and we use the Delft OD method to estimate the origin-destination patterns that are needed for the simulation of the destination oriented traffic. Next, we verify from data whether the necessary conditions for applying speed limits against shock waves are satisfied. We show that the MPC controller performs well even under the assumption that the traffic demand is not known on the on-ramps and is known for only a few kilometers upstream and downstream of the controlled stretch. This approach results in an improvement of the total time spent in the network with about 15%. © 2003 IEEE.

关键词： Shock waves

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Evolutionary multi-criterion optimization

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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2003年 2632卷

作者： Fonseca, Carlos M. Fleming, Peter J. Zitzler, Eckart Deb, Kalyanmoy Thiele, Lothar University of the Algarve Centre for Intelligent Systems Campus de Gambelas Faro Portugal University of Sheffield Department of Automatic Control and Systems Engineering Mappin Street Sheffield United Kingdom Swiss Federal Institute of Technology Department of Electrical Engineering Computer Engineering and Networks Laboratory Gloriastrabe 35 Zurich Switzerland Indian Institute of Technology Department of Mechanical Engineering Kanpur Genetic Algorithms Laboratory Kanpur India

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A delay systems approach to linear differential repetitive processes: controllability and optimization

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IFAC Proceedings Volumes 2003年第19期36卷 333-338页

作者： S. Dymkou E. Rogers M. Dymkov K. Gałkowski D.H. Owens School of Information Technology and Mathematical Sciences University of Ballarat Victoria 33353 Australia Department of Electronics and Computer Science University of Southampton Southampton SO 17 1BJ UK Institute of Mathematics National Academy of Sciences of Belarus Surganov 11 220072 Minsk Belarus Institute of Control and Computation Engineering Technical University of Zielona Góra Poland Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD. UK

Differential linear repetitive processes are a class of continuous-discrete 2D linear systems of both systems theoretic and applications interest. The feature which makes them distinct from other classes of such systems is that information propagation in one of the two independent directions only occurs over a finite interval. Applications areas include iterative learning control and iterative solution algorithms for classes of dynamic nonlinear optimal control problems based on the maximum principle. In this paper, we investigate further the structural links between differential linear repetitive processes and a special class of time delay systems. This leads to some significant new controllability and optimal control results for these processes.

关键词： Repetitive processes time delay approaches controllability optimization

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Panel Discussion Witherto Robust control

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IFAC Proceedings Volumes 2003年第11期36卷 591-597页

作者： Roberto Tempo Tamer Başar Pramod P. Khargonekar Petar V. Kokotovic Carsten W. Scherer IEIIT-CNR Politecnico di Torino Italy Coordinated Science Laboratory University of Illinois at Urbana-Champaign USA College of Engineering University of Florida Gainesville USA Department of Electrical and Computer Engineering University of California at Santa Barbara USA Mechanical Engineering Systems and Control Group Delft University of Technology The Netherlands

A panel discussion with the title Whitherto Robust control was held during the IEEE Conference on Decision and control in Honolulu, HI, in December 1990. Organizers and Chairs were B.R. Barmish and P.P. Khargonekar, while the panelists were D.S. Bernstein, S.P. Bhattacharyya, S.P. Boyd, J.C. Doyle, I.M. Horowitz and R.E. Skelton. Today, the goals of researchers working on robust control are probably quite different than thirteen years ago. This seems true both in the progress of novel theoretic paradigms as well as in the developments of new tools required by emerging applications. This panel discussion addresses classical issues and outlines future directions within robust control. We hope that it will contribute to its growth in the years to come. The panelists’ viewpoint are presented in the next pages.

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Suppressing shock waves on the A1 in The Netherlands-model calibration and model-based predictive control

Suppressing shock waves on the A1 in The Netherlands-model c...

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International Conference on Intelligent Transportation

作者： A. Hegyi D.N. Duy B. De Schutter J. Hellendoorn S.P. Hoogendoorn S. Stramigioli Delft Center for Systems and Control Delft University of Technnology Delft Netherlands Transponation Planning and Traffic Engineering Section Fac. Civil Engineering & Geosciences Delft University of Technnology Delft Netherlands Control Laboratory. EUCE. Fac. of Electrical Engineering Mathematics & Computer Science University of Twente Enschede Netherlands

关键词： Predictive models Shock waves Calibration Predictive control Traffic control Pollution measurement Artificial intelligence Communication system traffic control Optimal control Vehicle dynamics

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