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Scene change detection by audio and video clues

Scene change detection by audio and video clues

引用

2002 IEEE International Conference on Multimedia and Expo, ICME 2002

作者： Chen, Shu-Ching Shyu, Mei-Ling Liao, Wenhui Zhang, Chengcui Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33 199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)0780373049

Automatic video scene change detection is a challenging task. Using audio or visual information alone often cannot provide a satisfactory solution. However, how to combine audio and visual information efficiently still remains a difficult issue since there are various cases in their relationship due to the versatility of videos. We present an effective scene change detection method that adopts the joint evaluation of the audio and visual features. First, video information is used to find the shot boundaries. Second, the audio features for each video shot can be extracted. Lastly, an audio-video combination schema is proposed to detect the video scene boundaries. © 2002 IEEE.

关键词： Pattern recognition

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Affecting the accuracy of an active vision head 2nd

引用

2nd Hellenic Conference on Artificial Intelligence, SETN 2002

作者： Gasteratos, Antonios Sandini, Giulio Laboratory of Electronics Section of Electronics and Information Systems Technology Department of Electrical and Computer Engineering Democritus University of Thrace XanthiGR-671 00 Greece Laboratory for Integrated Advanced Robotics Department of Communication Computer and System Sciences University of Genoa Viale Causa 13 GenoaI-16145 Italy

ISBN: (纸本)3540434720

In any measuring system the categorization of the error generation factors leads to simplification of complex error problems and to higher suppression of the error. In this paper we categorize, quantify and analyze the errors that affect a binocular active vision head. Simulations have been made and experimental results on a high resolution pan-tilt-vergence mechanism are also proposed. As a conclusion it can be said that the system performs optimal when it is initialized so that the two cameras are perfectly aligned and perpendicular to the baseline. Small variations in the vergence angle or small horizontal deviations of the principal point alters the measurement dramatically. On the other hand, variations in pan and tilt and vertical deviations of the principal point, affect the measurement insignificantly. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Errors

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Pragma: An infrastructure for runtime management of grid applications 16

Pragma: An infrastructure for runtime management of grid app...

引用

16th International Parallel and Distributed Processing Symposium, IPDPS 2002

作者： Parashar, M. Hariri, S. Applied Software System Laboratory Rutgers the State University of New Jersey PiscatawayNJ08854 United States Dept. of Electrical and Computer Engineering University of Arizona TucsonAZ85721 United States

ISBN: (纸本)0769515738

This paper presents an overview of Pragma, an adaptive runtime infrastructure capable of reactively and proactively managing and optimizing application execution using current system and application state, predictive models for system behavior and application performance, and an agent based control network. The overarching motivation for this research is to enable the next generation of very largescale dynamically adaptive scientific and engineering simulations on widely distributed and highly heterogeneous and dynamic execution environments such as the computational "grid". Pragma combines 4 key components: system characterization and abstraction component, application characterization component, active network control, and policybase. The design of Pragma is driven by three astrophysical simulations chosen to be representative of a wide variety of important simulations and to expose many of the problems presently encountered (and currently unsolved) by computational physicists. The design, prototype implementation, and preliminary evaluations of Pragma components are presented. © 2002 IEEE.

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IFSIMS - Internet Framework Service for Intelligent Medical systems

IFSIMS - Internet Framework Service for Intelligent Medical ...

引用

Annual IEEE Symposium on computer-Based Medical systems

作者： M. Lenic P. Kokol R. Yamamoto Laboratory for system design Faculty of electrical engineering and computer science University of Maribor Slovenia

Modern medicine generates huge amounts of sensitive data. Data mining and knowledge discovery systems can be used to extract useful information/knowledge in order to to improve future diagnoses and reduce costs. On the other hand, when analysing data, the most recent methods, that extract the most accurate knowledge and decision models, should be used. This can be established with a service enabling quick access to newly developed methods. In this paper, a service for doing this, named IFSIMS (Internet Framework Service for Intelligent Medical systems), is presented.

关键词： Intelligent systems Data mining Medical diagnostic imaging Data analysis Web and internet services Laboratories Electrical engineering computer science Biomedical informatics Educational institutions

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A stochastic model for content-based image retrieval 3rd

A stochastic model for content-based image retrieval

引用

3rd IEEE Pacific Rim Conference on Multimedia, PCM 2002

作者： Shyu, Mei-Ling Chen, Shu-Ching Luo, Lin Shu, Chi-Min Department of Electrical and Computer Engineering University of Miami Coral GablesFL United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL United States Department of Environmental and Safety Engineering National Yunlin University of Science and Technology Touliu Yunlin Taiwan

ISBN: (纸本)3540002626

Multimedia data, typically image data, is increasing rapidly across the Internet and elsewhere. To keep pace with the increasing volumes of image information, new techniques need to be investigated to retrieve images intelligently and efficiently. Content-based image retrieval is always a challenging task. In this paper, a stochastic model, called Markov Model Mediator (MMM) mechanism, is used to model the searching and retrieval process for content-based image retrieval. Different from the common methods, our stochastic model carries out the searching and similarity computing process dynamically, taking into consideration not only the image content features but also other characteristics of images such as their access frequencies and access patterns. Experimental results demonstrate that the MMM mechanism together with the stochastic process can assist in retrieving more accurate results for user queries. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Stochastic models

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Non-adiabatic losses in fused fiber couplers-experimental findings

Non-adiabatic losses in fused fiber couplers-experimental fi...

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2002 5th IEEE International Conference on Semiconductor Electronics, ICSE 2002

作者： Shaarj, Ahmad Zaki Abdullah, Mohd. Khazani Shaarj, Sahbudin Photonics Technology Laboratory Department of Electrical Electronics and System Engineering Universit i Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia Photonics Laboratoiy Department of Computer and Communication Systems Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia

ISBN: (纸本)0780375785

Bi-conically tapered single-mode couplers are fabricated using a fiber fusion coupler workstation. Losses found during fabrication are analyzed for a range of elongation. It is found that longer elongations will lower the losses. Theoretically, the losses are due to the taper paths crossing delineating curves. These losses which occur during tapering process are not really adiabatic if part of the signal power is not guided at the end of tapering process. In other words, taper path will not be inside adiabatic region of cladding guidance. It will cross from core-guidance region into lossy region or non-adiabatic region of cladding guidance.

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Evolutionary algorithms and rough sets-based hybrid approach to classificatory decomposition of cortical evoked potentials 3rd

Evolutionary algorithms and rough sets-based hybrid approach...

引用

3rd International Conference on Rough Sets and Current Trends in Computing, RSCTC 2002

作者： Smolinski, Tomasz G. Boratyn, Grzegorz M. Milanova, Mariofanna Zurada, Jacek M. Wrobel, Andrzej Computational Intelligence Laboratory Department of Electrical and Computer Engineering University of Louisville LouisvilleKY40292 United States Department of Computer Science University of Arkansas at Little Rock Little RockAR72204 United States Laboratory of Visual System Department of Neurophysiology Nencki Institute of Experimental Biology 3 Pasteur Street Warsaw02-093 Poland

ISBN: (纸本)9783540442745

This paper presents a novel approach to decomposition and classification of rat’s cortical evoked potentials (EPs). The decomposition is based on learning of a sparse set of basis functions using Evolutionary Algorithms (EAs). The basis functions are generated in a potentially overcomplete dictionary of the EP components according to a probabilistic model of the data. Compared to the traditional, statistical signal decomposition techniques, this allows for a number of basis functions greater than the dimensionality of the input signals, which can be of a great advantage. However, there arises an issue of selecting the most significant components from the possibly overcomplete collection. This is especially important in classification problems performed on the decomposed representation of the data, where only those components that provide a substantial discernibility between EPs of different groups are relevant. In this paper, we propose an approach based on the Rough Set theory’s (RS) feature selection mechanisms to deal with this problem. We design an EA and RS-based hybrid system capable of signal decomposition and, based on a reduced component set, signal classification. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Hybrid systems

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Sparse correlation kernel analysis and evolutionary algorithm-based modeling of the sensory activity within the rat’s barrel cortex 1st

Sparse correlation kernel analysis and evolutionary algorith...

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1st International Workshop on Pattern Recognition with Support Vector Machines, SVM 2002

作者： Milanova, Mariofanna Smolinski, Tomasz G. Boratyn, Grzegorz M. Zurada, Jacek M. Wrobel, Andrzej Department of Computer Science University of Arkansas at Little Rock Little RockAR72204 United States Computational Intelligence Laboratory Department of Electrical and Computer Engineering University of Louisville LouisvilleKY40292 United States Laboratory of Visual System Department of Neurophysiology Nencki Institute of Experimental Biology 3 Pasteur Street Warsaw02-093 Poland

ISBN: (纸本)354044016X

This paper presents a new paradigm for signal decomposition and reconstruction that is based on the selection of a sparse set of basis functions. Based on recently reported results, we note that this framework is equivalent to approximating the signal using Support Vector Machines. Two different algorithms of modeling sensory activity within the barrel cortex of a rat are presented. First, a slightly modified approach to the Independent Component Analysis (ICA) algorithm and its application to the investigation of Evoked Potentials (EP), and second, an Evolutionary Algorithm (EA) for learning an overcomplete basis of the EP components by viewing it as probabilistic model of the observed data. The results of the experiments conducted using these two approaches as well as a discussion concerning a possible utilization of those results are also provided. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Evolutionary algorithms

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GHz twisted differential line structure on printed circuit board to minimize EMI and crosstalk noises

GHz twisted differential line structure on printed circuit b...

引用

Electronic Components and Technology Conference (ECTC)

作者： Dong Gun Kam Heeseok Lee Seungyong Baek Bongcheol Park Joungho Kim Terahertz Media and System Laboratory Division of Electrical Engineering Department of Electrical Engineering and Computer Science KAIST Taejon South Korea

The concept of twisted pair on the cable interconnection can be readily applied to the differential lines on printed circuit board (PCB), which enables enhanced immunity against crosstalk and radiated emission. In this paper, twisted differential line (TDL) is implemented on PCB and fully characterized. First, the transmission characteristics of TDL including propagation constant and differential impedance are extracted by using 3D full-wave analysis. The potential of TDL for the transmission of over GHz signal and enhanced immunity against crosstalk and radiated emission is clearly shown. Second, the measurement results reconfirm TDL's capability as a good transmission line structure over several GHz. Also, it is modeled by a simple equivalent circuit, based on measurement results. Third, the enhanced immunity of TDL against crosstalk and radiated emission is clearly demonstrated by measurement results. TDL is compared with other transmission line structures showing its superiority. Finally, several ideas to improve TDL's performance are suggested and verified to be useful.

关键词： Printed circuits Electromagnetic interference Crosstalk Transmission line measurements Distributed parameter circuits Power cables Integrated circuit interconnections Propagation constant Impedance Equivalent circuits

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Reinforcement learning algorithms for robotic navigation in dynamic environments

Reinforcement learning algorithms for robotic navigation in ...

引用

International Joint Conference on Neural Networks (IJCNN)

作者： G. Yen T. Hickey Intelligent System and Control Laboratory School of Electrical and Computer Engineering Oklahoma State University Stillwater OK USA

An issue of primary importance in the field of reinforcement learning (RL) is the tradeoff between exploration and exploitation. Balancing exploration and exploitation becomes even more crucial in an intelligent agent designed to operate in dynamic environments. Three methods are proposed to improve the performance of traditional RL methods such as Q-learning. The proposed improvements are: the addition of a forgetting mechanism, the use of feature-based state inputs, and the addition of a hierarchical structure to an RL agent. Experimental results are presented and utilized in evaluation of the proposed methods. The proposed algorithms are compared to established methods and to theoretically optimal solutions.

关键词： Navigation Robot sensing systems Automatic control Control systems Mobile robots Intelligent robots Machine learning algorithms Optimal control Orbital robotics Robot control

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