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Hand gesture recognition using hidden Markov models

Hand gesture recognition using hidden Markov models

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IEEE international conference on systems, Man and Cybernetics

作者： Byung-Woo Min Ho-Sub Yoon Jung Soh Yun-Mo Yang Toshiaki Ejima Image Processing Division Systems Engineering Research Institute Taejon South Korea Department of Information Engineering Korea University Chochiwon South Korea Department of AI Kyushu Institute of Technology Iizuka Japan

ISBN: (纸本)0780340531

Hand gesture recognition from visual images has a number of potential applications in human-computer interaction, machine vision, virtual reality, machine control in industry, and so on. Most conventional approaches to hand gesture recognition have employed data gloves, but for a more natural interface, hand gestures must be recognized from visual images without using any external devices. Our research is intended to draw and edit graphic elements by hand gestures. As a gesture is a continuous motion on a sequential time series, the HMM (hidden Markov model) must be a prominent recognition tool. The most important thing in hand gesture recognition is what the input features are that best represent the characteristics of the moving hand gesture. We consider a planar hand gesture in front of a camera and use 8-directional chain codes as input vectors. For training an HMM network, a simple context modeling method is embedded for training on a "left-to-right" HMM model. This model is applied to drawing and editing specified graphic elements. The overall objective is to recognize 12 different dynamic gestures. In our experiments, we have had good recognition results on a pre-confined test environment: (1) the spotting time is synchronized at the static state of a hand, (2) limb parts other than the hands are motionless, and (3) the change in the hand posture during movement is meaningless. Our system is to be advanced by adopting more diverse input features representing more dynamic features of hand gestures.

关键词： Hidden Markov models Image recognition Graphics Context modeling Machine vision Virtual reality Machine control Industrial control Data gloves Character recognition

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Experiences with network simulation 96

Experiences with network simulation

引用

1996 ACM SIGMETRICS international conference on Measurement and modeling of computer systems, SIGMETRICS 1996

作者： Brakmo, Lawrence S. Peterson, Larry L. Department Of Computer Science University Of Arizona TucsonAZ85721-0077 United States

ISBN: (纸本)0897917936

simulation is a critical tool in developing, testing, and evaluating network protocols and architectures. This paper describes x-Sim, a network simulator based on the x-kernel, that is able to fully simulate the topologies and traffic patterns of large scale networks. It also illustrates the capabilities and usefulness of the simulator with case studies. Finally, based on our experiences using x-Sim, we identify a set of principles (guidelines) for network simulation, and present concrete examples that quantify the value of these principles, along with the cost of ignoring them. © 1996 ACM.

关键词： Network architecture

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Real-time simulation techniques based on the RTO.k object modeling

Real-time simulation techniques based on the RTO.k object mo...

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Proceedings of the 1996 IEEE 20th Annual international computer Software & Applications conference, COMPSAC'96

作者： Kim, K.H. Nguyen, Cuong Park, Chanmo Univ of California Irvine United States

Real-time simulation is an advanced mode of simulation in which the simulation objects are designed to show the same timing behavior that the simulation targets do. A new approach to real-time simulation which is based on the RTO.k object modeling is discussed in this paper. The RTO.k object, which is a real-time extension of the well-established object structure, is capable of uniformly and accurately representing both real-time embedded computer systems and application environments. This simulation approach has many attractive features, e.g., expandability, modifiability, adaptability for efficient parallel processing, etc. In spite of its promising nature, the approach is an immature one in many respects and some desirable directions for future work aimed toward maturing the technology are also discussed.

关键词： computer simulation

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modeling the parallel execution profile of a CFD simulation on a cluster of workstations

Modeling the parallel execution profile of a CFD simulation ...

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Proceedings of the 1996 IEEE 2nd international conference on Algorithms & architectures for Parallel Processing, ICA3PP

作者： Walker, Edward Jianjian, Song Natl Supercomputing Research Cent Singapore

This paper describes the derivation of a model which elucidates the asymptotic parallel execution profile of a real CFD application parallelized over a cluster of workstations connected via the ethernet. The CFD simulation studies the formation of trailing vortices around a wing with no twist, no taper, no sweep and a rounded wing-tip during subsonic flight conditions. The simulation solves the conservation Navier-Stokes equations over a computational grid surrounding the wing of dimensions 61 × 71 × 41;177,571 grid points. modeling the execution of the parallelized version of such an application, before embarking on the actual parallel implementation, is important for two reasons. Firstly, it enables a better understanding of the intrinsic parallel structure and communication patterns of the chosen computational solution procedures. Secondly, it allows the scalability of the solution procedures, parallelized over a chosen parallel computer, to be analysed. We encourage parallel application developers to perform such modeling because it is our experience that better quality first time correct parallel programs can be derived more quickly when this is done.

关键词： Parallel processing systems

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Benchmarking and modeling: pick your favorite

Benchmarking and modeling: pick your favorite

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Proceedings of the 1996 22nd international conference for the Resource Management & Performance Evaluation of Enterprise Computing systems, CMG. Part 2 (of 2)

作者： Houtekamer, Gilbert E. Consul Risk Management B.V. Delft Netherlands

The advent of modern disk controller architectures has revived the debate on how to model this complex equipment. At the CMG95 conference a panel session was held on the topic of predicting performance for modern I/O controllers, and on what could be expected from those predictions. One of the topics of the discussion was whether or not new controllers rendered modeling useless because of their complexity. When analyzing complex equipment like a computer system or a disk I/O subsystem, it is apparent that the performance that one observes is the result of a very complex interaction between the hardware design and workload. It is tempting to state that the system is so complex that modeling or simulation will not work, and that a benchmark is the only way to get a performance prediction. In this paper we will show the contrary to be true, explaining how analytical modeling can be used successfully, even with limited information about the subsystem internal operation.

关键词： computer simulation

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simulation and modeling of a simultaneous multithreading processor

Simulation and modeling of a simultaneous multithreading pro...

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Proceedings of the 1996 22nd international conference for the Resource Management & Performance Evaluation of Enterprise Computing systems, CMG. Part 2 (of 2)

作者： Tullsen, Dean M. Univ of California San Diego La Jolla United States

Simultaneous multithreading is a processor architecture technique that combines the multiple-instruction-issue features of modern superscalar CPUs with the latency-hiding ability of multithreaded architectures. SMT permits multiple threads (e.g., multiple programs) to execute instructions on a superscalar processor's multiple functional units in a single cycle. The objective of simultaneous multithreading is to substantially increase processor utilization in the face of both long instruction latencies and limited available parallelism per thread. Measurement and analysis of such a processor requires a simulator that is powerful and flexible. This paper discusses the simulator and some of its unique features.

关键词： computer simulation

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Adaptive resource allocation for embedded parallel applications

Adaptive resource allocation for embedded parallel applicati...

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Proceedings of the 1996 3rd international conference on High Performance Computing, HiPC

作者： Jha, Rakesh Muhammad, Mustafa Yalamanchili, Sudhakar Schwan, Karsten Ivan-Rosu, Daniela de Castro, Chris Honeywell Technology Cent Minneapolis United States

Parallel and distributed computer architectures are increasingly being considered for application in a wide variety of computationally intensive embedded systems. Many such applications impose highly dynamic demands for resources (processors, memory, and communication network), because their computations are data-dependent, or because the applications must constantly interact with a rapidly changing physical environment, or because the applications themselves are adaptive. This paper presents a set of dynamic resource allocation techniques aimed at maintaining high levels of application performance in the presence of varying resource demands. It focuses on a class of applications structured as multiple pipelines of data-parallel stages, as this structure is common to many sensor-based applications. We discuss the issues involved in resource management for such applications, and present preliminary results from our implementations on Intel Paragon. Our approach uses feedback control - a real-time monitoring system is used to detect significant performance shortfalls, and resources are reallocated among the application components in an attempt to improve performance. The main contribution of this work is that it combines real-time monitoring of an application's performance with dynamic resource allocation, and focuses on practical implementations rather than simulation and analysis.

关键词： Parallel processing systems

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5th international Workshop on computer Aided systems Theory- EUROCAST 1995

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5th international Workshop on computer Aided systems Theory, EUROCAST 1995

ISBN: (纸本)9783540607489

The proceedings contain 42 papers. The special focus in this conference is on systems Theory and Design Environments and Tools. The topics include: On the structure of discrete systems;identification and recognition through shape in complex systems;a logical approach to system construction;task management system;toward a unified theory of discrete event systems;general systems description and implications;proving system properties by means of trigger-graph and petri nets;refinement mapping for general (discrete event) systems theory;a system-theoretic approach to planning and programming;equality of functions in CAST;basins of attraction estimation through symbolic graphical computing techniques;temporal and functional verification of a symbolic representation of complex systems;modelling differential equations by basic information technology means;system theoretic aspects of software architectures;a language for describing complex-evolutive software systems;an architecture for process modeling and execution support;a formal semantics for a graphical model representation in system design;a user-interface for a microsystems high-level simulator;CAST extensions to DASME to support generalized information theory;symbolic computing aided design of nonlinear PID controllers;discrete event simulation in an environment for temporal expert systems;TOMSPIN - a tool for modeling with stochastic petri nets;hybrid evolutionary programming;automatic induction of DEVS structures;systems engineering and infrastructures for open computer based systems;object-oriented high level modeling of complex systems;multifacetted, object oriented modeling in the transportation domain;a tool environment for the design of complex, real-time systems;systems level specification and modelling of reactive systems and control through deliberative and reactive planning.

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Design and evaluation of automated checks for signal processing applications 6

Design and evaluation of automated checks for signal process...

引用

conference on Advanced Signal Processing Algorithms, architectures, and Implementations VI

作者： Nair, VSS Kim, HC Krishnamurthy, N Abraham, JA SO METHODIST UNIV DEPT COMP SCI & ENGNDALLASTX 75275

ISBN: (纸本)0819422347

Most of the signal processing application programs involve computationally intensive iterative steps. In such programs, various failures in the underlying hardware manifest as control-flow errors that affect the reliability of the computed results. Various techniques have been proposed in the past to detect and recover from such control-flow errors. Unfortunately, all these techniques need either additional hardware or modification of the hardware and are not portable across various platforms. To circumvent these limitations, recently we have developed a high-level control-flow checking approach using assertions (CCA). In CCA, branch-free intervals in a given high-level language program are identified and the entry and exit points of the intervals are fortified through pre-inserted assertions. In this paper we describe an implementation of CCA through a pre-processor that will automatically insert the necessary assertions into a high-level language program. Based on the implementation we study the fault detection capabilities of CCA with the help of fault injection experiments using FERRARI.

关键词： simulation of CCA and DLA aggregates Switches Signal processing Reliability Computing systems computer engineering Data modeling Error analysis Error control coding computer science

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4th international Workshop on computer Aided systems Theory, CAST 1994

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4th international Workshop on computer Aided systems Theory, CAST 1994

ISBN: (纸本)3540614788

The proceedings contain 31 papers. The special focus in this conference is on Foundations of Cast and Methods. The topics include: systems science and systems technology;soft computer-aided system theory and technology;the configuration of complex systems;on the expressibility of discrete event specified systems;an object-oriented architecture for possibilistic models;fuzzy expert system technology;deciding boundedness for systems of two linear communicating finite state machines;a framework for knowledge intensive engineering;a development methodology for systems engineering of computer-based systems and its environmental support;an approach to the design of complex, heterogeneous hardware/software systems;a strategy for realizing traceability in an object-oriented design environment;towards a CAST method for a systematic generation of non-orthogonal complete transformations;tuning fuzzy logic controllers by classical techniques;computer aided design of protocol converters;modelling, analysis and evaluation of systems architectures;systematic strategy for performance prediction in improvement of parallel programs;design and implementation of multimedia environment for simulation;a neural network with direct learning based on linear or non-linear threshold logics;an evolutionary recurrent neural network designer and trainer;an environment for system level telecommunication design exploration and modelling;a tool for visual object modeling;a computer aided system for developing graphical telematic applications and a simple approach to improve the abstraction level of object representation.

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