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IEEE Annual International computer Software and Applications Conference (COMPSAC)

作者： Xiuqi Li Shu-Ching Chen Mei-Ling Shyu B. Furht NSF/FAU Multimedia Laboratory Florida Atlantic University Boca Raton FL USA Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL USA Department of Electrical and Computer Engineering University of Miami Coral Gables FL USA

An effective content-based visual image retrieval system is presented. This system consists of two main components: visual content extraction and indexing, and query engine. Each image in the image database is represented by its visual features: color and spatial information. The system uses a color label histogram with only thirteen bins to extract the color information from an image in the image database. A unique unsupervised segmentation algorithm combined with the wavelet technique generates the spatial feature of an image automatically. The resulting feature vectors are relatively low in dimensions compared to those in other systems. The query engine employs a color filter and a spatial filter to dramatically reduce the search range. As a result, queue processing is speeded up. The experimental results demonstrate that our system is capable of retrieving images that belong to the same category.

关键词： Image retrieval Content based retrieval Feature extraction Data mining Indexing Engines Histograms Shape Multimedia systems Image databases

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A multimedia semantic model for RTSP-based multimedia presentation systems

A multimedia semantic model for RTSP-based multimedia presen...

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International Symposium on Multimedia Software engineering

作者： Shu-Ching Chen Sheng-Tun Li Mei-Ling Shyu Chengjun Zhan Chengcui Zhang Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL USA Department of Information Management National Kaohsiung First University of Science and Technology Kaohsiung Taiwan Department of Electrical and Computer Engineering University of Miami Coral Gables FL USA

ISBN: (纸本)0769518575

An abstract multimedia semantic model called the multimedia augmented transition network (MATN) model is proposed to model the RTSP-based (real-time streaming protocol) multimedia presentation systems. RTSP provides a set of methods to support the functionality of "VCR-like" remote control on the client side so that users are allowed to control playback of the streaming media. The MATN model is used to model RTSP actions as well as temporal relations and synchronization control of the media streams. The advantages of using the MATN model are its simplicity, effectiveness, and ease of modification. Furthermore, a formal definition of the MATN model and modeling of RTSP actions using the MATN model are presented in detail.

关键词： Multimedia systems Streaming media Protocols Power system modeling Real time systems Quality of service Management information systems Laboratories computer science Information management

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Trial modeling of the hemodynamic response using event-related fMRI

Trial modeling of the hemodynamic response using event-relat...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： S.F. Cauley G. Tamer T.M. Talavage J.L. Ulmer School of Electrical & Computer Engineering Purdue University West Lafayette IN USA Purdue University System West Lafayette IN US Sch. of Electr. & Comput. Eng. Purdue Univ. West Lafayette IN USA Department of Radiology Medical College Milwaukee WI USA

Investigates the modeling of the intra-run trials within auditory event-related fMRI experiments. Building upon previously accepted techniques and models, a new, less rigid model is presented that allows for the estimation of the hemodynamic response across a much larger set of timepoints. This is accomplished by avoiding the reduction of timepoints that occurs when using trial averaging techniques. Instead, variations between trials are incorporated into a new model while still preserving the general characteristics of the response. The addition of a trial-dependent proportionality factor in the model significantly increases the accuracy of the coefficients estimated through a nonlinear least squares regression.

关键词： Hemodynamics Brain modeling Equations Biomedical engineering Biomedical measurements Biomedical computing Radiology Biomedical imaging Educational institutions Fluid flow measurement

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Video scene change detection method using unsupervised segmentation and object tracking

Video scene change detection method using unsupervised segme...

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2001 IEEE International Conference on Multimedia and Expo, ICME 2001

作者： Chen, Shu-Ching Shyu, Mei-Ling Zhang, Cheng-Cui Kashyap, R.L. Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States School of Electrical and Computer Engineering Purdue University West LafayetteIN47907 United States

ISBN: (纸本)0769511988

In order to manage the growing amount of video information efficiently, a video scene change detection method is necessary. Many advanced video applications such as video on demand (VOD) and digital library also require the scene change detection to organize the video content. In this paper, we present an effective scene change detection method using an unsupervised segmentation algorithm and the technique of object tracking based on the results of the segmentation. Our results have shown that this method can perform not only accurate scene change detection, but also obtain object level information of the video frames, which is very useful for video content indexing and analysis.

关键词： Image segmentation

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An adaptive optimal multimedia network transmission control scheme 2nd

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2nd IEEE Pacific-Rim Conference on Multimedia, IEEE-PCM 2001

作者： Shyu, Mei-Ling Chen, Shu-Ching Luo, Hongli Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States Distributed Multimedia System Laboratory Florida International University School of Computer Science MiamiFL33199 United States

ISBN: (纸本)3540426809

In this paper, we present a sender-driven adaptive optimal multimedia network transmission control scheme, which takes into account the buffer occupancy and network delay to maximize the utilization of network resources. For this purpose, adaptive network resource optimization with quadratic costs is used in the proposed scheme to provide the minimal allocation of the bandwidth and achieve the maximal utilization of the client buffer. Simulation results show that the transmission rate can be dynamically adjusted at the server according to the changing network delays and buffer packet sizes at the client to avoid the loss of packets, and at the same time to achieve the minimal bandwidth allocation at maximal utilization of the client buffer. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Bandwidth

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Optimal resource utilization in multimedia transmission

Optimal resource utilization in multimedia transmission

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2001 IEEE International Conference on Multimedia and Expo, ICME 2001

作者： Shyu, Mei-Ling Chen, Shu-Ching Luo, Hongli Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States

ISBN: (纸本)0769511988

Efficient utilization of network resources is essential in the provision of quality multimedia services. Different approaches have been proposed to shape the multimedia streams as a transmission schedule with smoothed traffic burst. In this paper, we concentrate on the problem of efficient use of bandwidth and client buffer. For this purpose, an optimal transmission schedule is proposed to provide the minimal allocation of the bandwidth and maximal utilization of the client buffer. Simulation results show that the shaping results obtained can dynamically adjust the transmission rate according to the buffer packet sizes and playback rates at the client to avoid the loss of packets, and at the same time achieve the minimal bandwidth allocation and maximal utilization of the client buffer.

关键词： Bandwidth

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Supporting Information Reuse for Video Data Indexing by Using Color Information 3

Supporting Information Reuse for Video Data Indexing by Usin...

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3rd International Conference on Information Reuse and Integration, IRI 2001

作者： Zhang, Chengcui Luo, Lin Chen, Shu-Ching Shyu, Mei-Ling Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States

ISBN: (纸本)9781618398390

In this paper, an object tracking framework assisted by image segmentation and color indexing techniques to support information reuse for video data is proposed. In order to obtain more accurate results of object tracking, a color indexing method called Color Label Criteria (CLC) is adopted to relax some of the restrictions and assumptions in object tracking in our previous work with low additional cost. Our experiment results on a real video sequence show that the CLC color indexing method is very helpful to achieve more robust object tracking. © (2001) by the International Society for computers and Their Applications All rights reserved.

关键词： Image segmentation

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Influence of inter-electrode distance on EMG

Influence of inter-electrode distance on EMG

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： A. Melaku D.K. Kumar A. Bradley School of Electrical and Computer System Engineering RMIT University Melbourne VIC Australia

This paper reports experimental research undertaken to study the effect of variation of inter-electrode distance on the electromyogram (EMG). The experiments were conducted on ten healthy subjects and they performed isometric contraction of their biceps of the right arm at 20, 50 and 80% of their maximal voluntary contraction (MVC). EMG was recorded using surface electrodes with the distance between the two active electrodes being 18 and 36mm. It has been observed that at low levels of muscle contraction there was no significant variation due to the change in the distance between the electrodes while at 50 and 80% of MVC there was a significant change in the amplitude of the EMG. Using time-frequency analysis of EMG, the study demonstrates a variation of the spectral content of the EMG with change in the IED. The study also has shown that there is a variation of the EMG with muscle contraction but that the comparison should be done if the distance between the electrodes has been kept constant.

关键词： Electromyography Electrodes Muscles Biological control systems Fatigue Time frequency analysis Electric variables Root mean square Stochastic processes Prosthetics

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A new incremental rerouting for handoff in wireless ATM networks 1

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1st International Conference on Human.Society@Internet, 2001

作者： Youn, Hee Yong Kim, Hee-Suk Choo, Hyunseung Kim, Keecheon School of Electrical and Computer Engineering Sungkyunkwan University Suwon440-746 Korea Republic of Media Communications Dept Digital Network System Lab LG Electronics Inc Korea Republic of Dept. Of Computer Science and Engineering Konkuk University Seoul143-701 Korea Republic of

ISBN: (数字)9783540477495

ISBN: (纸本)3540423133

Whenever a handoff occurs in wireless ATM network, the connection for mobile user must be reestablished in the new area. This paper proposes a new path re-routing scheme based on the incremental re-establishment approach, which decides the crossover node by comparing the distances between each node in the existing path and the new location, while traversing the path backward. This scheme allows us to efficiently decide a new path close to the shortest path. In order to realistically evaluate and compare the proposed scheme, we model the distance a mobile user makes for the given mobile speed and call duration statistics and propose a new approach for generating realistic random network. Comprehensive computer simulation for various random networks shows that the proposed scheme outperforms previous schemes in terms of path efficiency and handoff delay. We also obtain path reuse efficiency of more than 80%. The proposed scheme can be implemented by making use of the information in the routing table in the existing network structure. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Efficiency

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IDENTIFYING OVERLAPPED OBJECTS FOR VIDEO INDEXING AND MODELING IN MULTIMEDIA DATABASE systemS

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International Journal on Artificial Intelligence Tools 2001年第4期10卷 715-734页

作者： SHU-CHING CHEN MEI-LING SHYU CHENGCUI ZHANG R. L. KASHYAP Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL 33199 USA Department of Electrical and Computer Engineering University of Miami Coral Gables FL 33124 USA School of Electrical and Computer Engineering Purdue University West Lafayette IN 47907 USA

The identification of the overlapped objects is a great challenge in object tracking and video data indexing. For this purpose, a backtrack-chain-updation split algorithm is proposed to assist an unsupervised video segmentation method called the "simultaneous partition and class parameter estimation" (SPCPE) algorithm to identify the overlapped objects in the video sequence. The backtrack-chain-updation split algorithm can identify the split segment (object) and use the information in the current frame to update the previous frames in a backtrack-chain manner. The split algorithm provides more accurate temporal and spatial information of the semantic objects so that the semantic objects can be indexed and modeled by multimedia input strings and the multimedia augmented transition network (MATN) model. The MATN model is based on the ATN model that has been used in artificial intelligence (AI) areas for natural language understanding systems, and its inputs are modeled by the multimedia input strings. In this paper, we will show that the SPCPE algorithm together with the backtrack-chain-updation split algorithm can significantly enhance the efficiency of spatio-temporal video indexing by improving the accuracy of multimedia database queries related to semantic objects.

关键词： Multimedia Augmented Transition Network (MATN) Multimedia Input String Backtrack-Chain-Updation Split Algorithm Multimedia Database systems

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