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Real-time facial patterns mining and emotion tracking 3rd

3rd International Conference on Advances in Web-Age Information Management, WAIM 2002

作者： Xiang, Zhenggui Yao, Tianxiang Li, Jiang Yu, Keman State Key Laboratory of Intelligent Technology and Systems Dept of Computer Science and Tech Tsinghua University Beijing China Dept of Information System and Electrical Engineering Zhejiang University Zhejiang China Internet Media Group Microsoft Research Asia Beijing China

ISBN: (纸本)9783540440451

In this paper, we present a real-time method for mining the facial patterns and tracking the facial emotion. We first recognize the facial patterns based on a nonsupervised idea of pattern mining from video. To raise the mining speed, we adopt some simple and rapid filters called Gabor-like filters to mine individual feature patterns. To evaluate the facial patterns, we match deformable templates and analyze the histogram of local region. To track the mouth contour, we model dynamically the color distribution of lip and skin by EM algorithm and segment lip color by the Bayes classification rule. Finally, we represent the facial emotion with an avatar by transferring some parameters. Through experiments, our method can rapidly mine the facial patterns and track different facial expressions of different people whether they wear glasses or not. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Template matching

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Sub-10 cm/sup 3/ interferometric accelerometer with nano-g resolution

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Journal of Microelectromechanical Systems 2002年第3期11卷 182-187页

作者： N.C. Loh M.A. Schmidt S.R. Manalis Media Laboratory Massachusetts Institute of Technology Cambridge MA USA Zyomyx Inc. Hayward CA USA Microsystems Technology Laboratories Department of Electrical Engineering and Computer Science Massachsuetts lnstitute of Technology Cambridge MA USA Media Laboratory MIT Cambridge MA USA

A high-resolution accelerometer with a bulk-micromachined silicon proof mass and an interferometric position sensor was developed for measuring vibratory accelerations. The interferometer consists of interdigitated ringers that are alternately attached to the proof mass and support substrate. Illuminating the fingers with coherent light generates a series of diffracted beams. The intensity of a given beam depends on the out-of-plane separation between the proof mass fingers and support fingers. Proof masses with mechanical resonances ranging from 80 Hz to 1 kHz were fabricated with a two mask process involving two deep reactive ion etches, an oxide etch stop, and a polyimide protective layer. The structures were packaged with a laser diode and photodiode into 8.6-cm/sup 3/ acrylic housings. The 80-Hz resonant proof mass has a noise equivalent acceleration of 40 ng/rt Hz and a dynamic range of 85 dB at 40 Hz.

关键词： Fingers Optical interferometry Acceleration Resonance Etching Accelerometers Silicon Position measurement Vibration measurement Diffraction

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A multi-signature scheme with signers’ intentions secure against active attacks 4th

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4th International Conference on Information Security and Cryptology, ICISC 2001

作者： Kawauchi, Kei Minato, Hiroshi Miyaji, Atsuko Tada, Mitsuru Asahidai 1-1 Tatsunokuchi Nomi Ishikawa923-1292 Japan Department of Electrical Engineering and Computer Science Tufts University Halligan Hall 161 College Avenue MedfordMA02155-5528 United States Institute of Media and Information Technology Chiba University Japan

ISBN: (纸本)3540433198

In this paper, we propose a multi-signature scheme, in which each signer can express her intention associating with the message to be signed. Signers’ intentions mean a kind of information which can be newly attached to a signature in signers’ generating it. However, we have been introduced no multi-signature scheme dealing with intentions without loss of its efficiency. First, we consider a multi-signature scheme realizing the concept of signers’ intentions by utilizing existing schemes, and name it primitive method. After that, we introduce the proposed multi-signature scheme which is more efficient than the primitive method in view of the computational cost for verification and in view of the signature size. The proposed multi-signature scheme is shown to be secure even against adaptive chosen message insider attacks. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Authentication

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Unit-Cell Modeling of High-Speed Interconnect with Adjacent Metal-Filled Via Array using FDTD method

Unit-Cell Modeling of High-Speed Interconnect with Adjacent ...

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IEEE Workshop on Signal Propagation on Interconnects (SPI)

作者： Heeseok Lee Charlie Park Derek Kam Joungho Kim Terahertz Media and System Laboratory Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Taejon South Korea

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A reconfigurable digital signal processor architecture for high-efficiency MPEG-4 video encoding

A reconfigurable digital signal processor architecture for h...

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IEEE International Conference on Multimedia and Expo (ICME)

作者： Li-Hsun Chen Wei-Lung Liu O.T.-C. Chen Ruey-Liang Ma Signal and Media Laboratories Department of Electrical Engineering National Chung Cheng University Chiayi Taiwan Computer System Development Department Computer & Communications Research Labs Industrial Technology and Research Institute Hsinchu Taiwan

In this work, the instruction-level and function-level profile analyses of a MPEG-4 video encoder are performed to design a reconfigurable digital signal processor (DSP) architecture. According to the result from the instruction-level profile analysis, the proposed DSP architecture would be lined up with 5 arithmetic logic units (ALUs), 1 multiplier, and 2 load/store units. Such a line-up in the computation units would allow the proposed DSP architecture to have a better parallel processing capability and a higher hardware usage rate in realizing the MPEG-4 video encoder. The result from the function-level profile analysis reveals that the function of motion estimation requires the most computation power. Hence, the proposed DSP architecture reconfigures 4 ALUs and a multiplier to become a functional unit for high parallel processing of motion estimation. This hardware design of motion estimation is primarily dependent on the adders and multiplier of the proposed DSP architecture, plus a few control circuits to convert the computation units. Such arrangement would have less hardware cost than in conventional video processors with specialized functional units for motion estimation. Lastly benchmark analysis and comparison are done between the proposed DSP architecture and TI TMS320C64x architecture. In processing the MPEG-4 video encoder, the proposed DSP architecture is as much as 80% more efficient in computation than the TI TMS320C64x architecture.

关键词： Digital signal processors MPEG 4 Standard Encoding computer architecture Digital signal processing Motion estimation Hardware Parallel processing Signal analysis Performance analysis

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A low-power, fixed-point, front-end feature extraction for a distributed speech recognition system

A low-power, fixed-point, front-end feature extraction for a...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Brian Delaney Nikil Jayant Mat Hans Tajana Simunic Andrea Acquaviva Georgia Institute of Technology Multimedia Communications Lab School of Electrical and Computer Engineering Atlanta GA USA Client and Media Systems Lab Hewlett Packard Laboratories Palo Alto CA USA

This work describes the optimization of a signal processing front-end for a distributed speech recognition system with the goal of reducing power consumption. Two categories of source code optimizations were used, architectural and algorithmic. Architectural optimizations reduce the power consumption for a particular system, in this case, the HP Labs Smartbadge IV prototype portable system. Algorithmic optimizations are more general and involve changes in the algorithmic implementation of the source code to run faster and consume less power. A cycle accurate energy simulation shows a reduction in power usage by 83.5% with these optimizations. The optimized source code runs 34 times faster than the original code, therefore it can run at lower processor clock speeds and voltages for further reductions in power consumption. This technique, known as dynamic voltage scaling, was implemented on the Smartbadge IV hardware for an overall reduction in power usage of 89.2%.

关键词： Biological system modeling Cepstrum Heuristic algorithms Optimization Feature extraction Artificial neural networks Radio access networks

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Fast k-nn image search with self-organizing maps

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International Conference on Image and Video Retrieval, CIVR 2002

作者： Oh, Kun Seok Aghbari, Zaher Kim, Pan-Koo Department of Digital Media Division of Information Technology Kwangju Health College 683-3 Shinchang-dong Kwangsan-ku Gwangju506-701 Korea Republic of Department of Intelligent Systems Graduate School of Information Science and Electrical Engineering Kyushu University 6-10-1 Hakozaki Higashi-Ku Fukuoka812-8581 Japan Department of Computer Engineering Chosun University 375 Seosuk-dong Dong-ku Gwangju501-759 Korea Republic of

ISBN: (纸本)9783540438991

Feature-based similarity retrieval became an important research issue in image database systems. The features of image data are useful in image discrimination. In this paper, we propose a fast k-Nearest Neighbor (k-NN) search algorithm for images clustered by the Self-Organizing Maps algorithm. Self-Organizing Maps (SOM) algorithm maps feature vectors from high dimensional feature space onto a two-dimensional space. The mapping preserves the topology (similarity) of the feature vectors by clustering mutually similar feature vectors in neighboring nodes (clusters). Our k-NN search algorithm utilizes the characteristics of these clusters to reduce the search space and thus speed up the search for exact k-NN answer images to a given query image. We conducted several experiments to evaluate the performance of the proposed algorithm using color feature vectors and obtained promising results. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Nearest neighbor search

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Discovering recurrent events in video using unsupervised methods

Discovering recurrent events in video using unsupervised met...

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IEEE International Conference on Image Processing

作者： M.R. Naphade T.S. Huang Pervasive Media Management Group IBM Thomas J. Watson Research Center Hawthorne NY USA Department of Electrical & Computer Engineering Coordinated Sciences Laboratory Beckman Institute for Advanced Science & Technology University of Illinois Urbana-Champaign Urbana-Champaign IL USA

Production videos such as news, sports and movies have a definitive structure that involves short term interaction as well as long term correlation. This structure in video can be captured by models that take into consideration the short term statistics as well as long term recurrence. We investigate the application of probabilistic models that capture this structure. The novel approach is to characterize the short term events in video by models that can account for temporal support in terms of piecewise stationary signals with transitions, These short term events can then be embedded within another temporal model that accounts for transitions between these event and thus characterizes long term history. This also leads to the detection of recurring events in video using a monolithic model. The proposed approach is an unsupervised algorithm for event detection and it can be used for summarization, similarity based matching and enhanced browsing.

关键词： Motion pictures Event detection Hidden Markov models Clustering algorithms Production Layout TV Gunshot detection systems Statistics Broadcasting

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Model management facilities for cyber DSS 3

Model management facilities for cyber DSS

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3rd International Conference on Enterprise Information Systems, ICEIS 2001

作者： Jais, Jamilin Selamat, H. Ghani, M. Azim A. Mamat, A. Rahman, Zarina A. Hussein, H. Department of Computer Science and Information Technology College of Engineering University Tenaga Nasional Jalan Kajang-Puchong Kajang Selangor43009 Malaysia Faculty of Computer Science and Information Technology University Putra Malaysia Selangor Malaysia Faculty of Media Arts Multimedia University Putra Jaya Selangor Malaysia

ISBN: (纸本)9729805024

Model management in cyber decision support systems (Cyber DSS) is a new approach to problem-solving. This is because professional judgement and insight are critical in decision-making. DSS is designed to support a manager's skill at all stages of decision-making such as problem identification, choosing relevant data to work with, picking an appropriate approach to be used in making the decision and evaluating the alternative course of action. In complex decision situations, it will often be necessary to coordinate the application of multiple decision models for solving a problem. DSS need a model management component that handles the tasks of identifying appropriate models from a problem description, sequencing their application, and in substantiating them with the necessary data.

关键词： Decision support systems

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Volumetric warping for voxel coloring on an infinite domain 2

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2nd European Workshop on 3D Structure from Multiple Images of Large-Scale Environments, SMILE 2000

作者： Slabaugh, Gregory G. Malzbender, Thomas Bruce Culbertson, W. School of Electrical and Computer Engineering Georgia Institute of Technology AtlantaGA30332 United States Client and Media Systems Lab Hewlett-Packard Laboratories Palo AltoCA94306 United States

ISBN: (纸本)9783540418450

Starting with a set of calibrated photographs taken of a scene, voxel coloring algorithms reconstruct three-dimensional surface models on a fnite spatial domain. In this paper, we present a method that warps the voxel space, so that the domain of the reconstruction extends to an fnnite or semi fnnite volume. Doing so enables the reconstruction of objects far away from the cameras, as well as reconstruction of a background environment. New views synthesized using the warped voxel space have improved photo-realism. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Image enhancement

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