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International Conference on Control, Automation, Robotics and Vision (ICARCV)

作者： Dakshina Ranjan Kisku Ajita Rattani Massimo Tistarelli Phalguni Gupta Department of Computer Science and Engineering Asansol Engineering College Asansol India Department of Electrical and Electronics Engineering University of Cagliari Cagliari Italy Department of Architecture and Planning University of Sassari Alghero Italy Department of Computer Science and Engineering Indian Institute of Technology Kanpur Kanpur India

This paper presents a novel face recognition technique with graph topology drawn on scale invariant feature transform (SIFT) features and is compared with all the available well known techniques on SIFT features, and elastic bunch graph matching (EBGM) technique drawn on gabor wavelet feature. IITK face database is used for evaluation purpose. Test results show that the proposed graph matching technique will be an appropriate one for face recognition. Finally, the test results have been compared with the results found on BANCA face database following MC protocol only.

关键词： Authentication Face recognition Spatial databases Biometrics Face detection Robotics and automation Application software computer science Testing Lighting

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Study on campus wireless mobile model based on AOC modeling

Study on campus wireless mobile model based on AOC modeling

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IET 2nd International Conference on Wireless, Mobile and Multimedia Networks (ICWMMN 2008)

作者： Chun-xiao Zhao Ning Ding Lu Gao Li-jun Wang Department of Computer Beijing University of Civil Engineering and Architecture China School of Computer Science and Engineering University of Science and Technology Liaoning Anshan 114051 China School of Information Science and Engineering Bohai University Jinzhou 121000 China

With regard to the fundamental problem of the MANET routing protocols, this paper according to the campus mobile node behaviour, aims to establish a campus wireless mobile model based on AOC system. Through NS-2 simulation platform extensive simulate result and analysis of different mobile fashion which effect on the MANET routing protocol performance: in the aspect of Packet Delivery Ratio,DSR and AODV both surpass 95%, were not greatly affected by the changes of node mobile rate; DSDV and DSR closed to the Path Optimality.

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Editorial: Dependability and security

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IEEE Transactions on Dependable and Secure Computing 2008年第1期5卷 1-3页

作者： Iyer, Ravishankar K. Gligor, Virgil D. Kalbarczyk, Zbigniew T. Kanoun, Karama Katzenbeisser, Stefan Mukherjee, Shubu Shieh, Shiuhpyng Zorian, Yervant Department of Electrical and Computer Engineering Carnegie Mellon University Microsoft's Trusted Computing Academic Advisory Board Center for Reliable and High-Performance Computing Coordinated Science Laboratory University of Illinois Urbana-Champaign United States IEEE IEEE Computer Society LAAS CNRS IFIP Working Group 10.4 on Dependable Computing and Fault Tolerance Special Interest Group on Dependability Benchmarking IFIP Working Group 10.4 French SEE Technical Committee on Trustworthy Computer Systems SEE Working Group Design and Validation for Dependability Technical University Munich Germany Darmstadt University of Technology ACM IACR Intel's SER Tech Council Intel's Architecture Patent Committee Taiwan Information Security Center NCTU IEEE Reliability Society Taipei and Tainan IACR United States Virage Logic Corp. AT and T Bell Laboratories Logic Vision Inc. University of British Columbia IEEE Test Technology Technical Council

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The feeling of color: A haptic feedback device for the visually disabled

The feeling of color: A haptic feedback device for the visua...

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IEEE Biomedical Circuits and Systems (BIOCAS)

作者： Jonathan Tapson Javier Diaz David Sander Netta Gurari Elisabetta Chicca Philippe Pouliquen Ralph Etienne-Cummings Electrical Engineering University of Cape Town Rondebosch South Africa Department of Mechanical Engineering Johns Hopkins University Baltimore MD USA Department of Computer Architecture and Technology Universidad de Granada Granada Spain Institute of Neuroinformatics University ETH Zurich Zurich Switzerland Electrical and Computer Engineering University of Maryland College Park USA Department of Electrical and Computer Engineering Johns Hopkins University Baltimore MD USA

We describe a sensory augmentation system designed to provide the visually disabled with a sense of color. Our system consists of a glove with short-range optical color sensors mounted on its fingertips, and a torso-worn belt on which tactors (haptic feedback actuators) are mounted. Each fingertip sensor detects the observed objectpsilas color. This information is encoded to the tactor through vibrations in respective locations and varying modulations. Early results suggest that detection of primary colors is possible with near 100% accuracy and moderate latency, with a minimum amount of training.

关键词： Haptic interfaces Torso Optical feedback Optical sensors Sensor systems Actuators Hardware Cities and towns Africa Mechanical engineering

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Redundant optical data transmission using semiconductor lasers

Redundant optical data transmission using semiconductor lase...

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ACS/IEEE International Conference on computer Systems and Applications

作者： H. D. Wacker J. Borcsok H. Hillmer Development HIMA Paul Hildebrandt GmbH + Co KG Bruehl GERMANY Department of Electrical Engineering and Computer Science Chair for Computer Architecture and System Programming Kassel GERMANY University of Kassel Institute of Nanostructure Technologies and Analytics (INA) and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT) Kassel GERMANY

This paper is dealing with redundant optoelectronic data transmission with special respect to laser channels. The concept of the generalized erasure channel (GEC) is used to determine the probability of undetected error for some binary symmetric and non-symmetric channels protected by appropriate codes. In detail, communication via different binary symmetric channels (BSCs), generalized erasure channels and symmetrized binary non symmetric channels (BNSCs) is investigated. Simple upper bounds are given, relating the new formulas to that one of the BSC Finally the results in connection with an inequality for proper codes are applied to multi wavelength optical transmission through channels generated by semiconductor lasers.

关键词： Data communication Semiconductor lasers Error probability Optical transmitters Protection Safety Wavelength division multiplexing Laser theory Upper bound Linear code

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A Synchronized Variable Frequency Clock Scheme in Chip Multiprocessors

A Synchronized Variable Frequency Clock Scheme in Chip Multi...

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2008 IEEE International Symposium on Circuits and Systems (ISCAS 2008), vol.10

作者： Qifei Fan Ge Zhang Weiwu Hu Department of Computer Science and Technology University of Science and Technology Hefei China Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing China

Dynamic voltage/frequency scaling (DVFS) has been widely applied to reduce the power dissipation of multi-cores processor. However, when applying DVFS, signals need to be synchronized between asynchronous clock domains with overhead of several cycles, which will result in performance penalty, and during frequency scaling the circuit cannot work. This paper proposes a novel variable frequency clock scheme in chip multiprocessors. In our scheme, processor cores running at different frequency can communicate with each other without the overhead of synchronizing signals. The results of simulation show that our scheme can achieve EDP improvement by 16.8percent, with only 3.6percent performance degradation.

关键词： Frequency synchronization Clocks Phase locked loops Circuits Frequency conversion Multicore processing Voltage control Degradation Dynamic voltage scaling Network-on-a-chip

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Automatic computer aided diagnosis tool using component-based SVM

Automatic computer aided diagnosis tool using component-base...

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IEEE Symposium on Nuclear Science (NSS/MIC)

作者： J. M. Gorriz J. Ramirez A. Lassl D. Salas-Gonzalez E. W. Lang C. G. Puntonet I. Alvarez M. Lopez M. Gomez-Rio Department of Signal Theory Networking and Communications University of Granada Spain Department of Computational Intelligence and Machine Learning University of Regensburg Germany Department of Computer Architecture and Technology University of Granada Spain Servicio de Medicina Nuclear Hospital Universitario Granada Spain

Alzheimer type dementia (ATD) is a progressive neurodegenerative disorder first affecting memory functions and then gradually affecting all cognitive functions with behavioral impairments and eventually causing death. Functional brain imaging including single-photon emission computed tomography (SPECT) is commonly used to guide the clinician’s diagnosis. However, conventional evaluation of these scans often relies on manual reorientation, visual reading and semiquantitative analysis of certain regions of the brain. These steps are time consuming, subjective and prone to error. This paper shows a fully automatic computer-aided diagnosis (CAD) system for improving the accuracy in the early diagnosis of the Alzheimer’s disease. The proposed approach is based on a first automatic feature selection, and secondly a combination of component-based support vector machine (SVM) classification and a pasting votes technique of ensemble SVM classifiers.

关键词： Support vector machines Support vector machine classification Dementia Brain Computed tomography computer errors computer aided diagnosis Coronary arteriosclerosis Alzheimer's disease Voting

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A comparison of nonlinear least-square optimization methods in affine registration of SPECT images

A comparison of nonlinear least-square optimization methods ...

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IEEE Symposium on Nuclear Science (NSS/MIC)

作者： D. Salas-Gonzalez J. M. Gorriz J. Ramirez A. Lassl C. G. Puntonet E. W. Lang M. Gomez-Rio Department of Signal Theory Networking and Communication University of Granada Spain Department of Computer Architecture and Technology University of Granada Spain Department of Computational Intelligence and Machine Learning University of Regensburg Germany Servicio de Medicina Nuclear Hospital Universitario Virgen de las Nieves Granada Spain

The complexity of brain structures and the differences between brains of different subjects or across image modalities make necessary the normalization of the images with respect to a common template. The general affine model, with 12 parameters, is usually chosen as the first normalization algorithm before to proceed with a more complex non-rigid spatial transformation model. Usually, a cost function which presents an extreme value when the template and the image are matched together is optimized. In this work, the objective function is chosen to be the mean squared difference between both images, and the performance of different optimization procedures are compared. Namely, the Levenberg-Marquardt and four Gauss-Newton algorithms.

关键词： Optimization methods Newton method Least squares methods Recursive estimation Brain Cost function Image registration Nuclear and plasma sciences Single photon emission computed tomography Computed tomography

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Use of Kohonen Maps as feature selector for selective attention brain-computer interfaces

Use of Kohonen Maps as feature selector for selective attent...

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2nd International Work-Conference on the Interplay Between Natural and Artificial Computation, IWINAC 2007

作者： Lopez, Miguel Angel Pomares, Hector Damas, Miguel Prieto, Alberto De La Hernandez, Eva Maria Plaza Department of Computer Architecture and Computer Technology University of Granada

ISBN: (纸本)3540730524

Selective attention to visual-spatial stimuli causes decrements of power in alpha band and increments in beta. For steady-state visual evoked potentials (SSVEP) selective attention affects electroencephalogram (EEG) recordings, modulating the power in the range 8-27 Hz. The same behaviour can be seen for auditory stimuli as well, although for auditory steady-state response (ASSR), it is not fully confirmed yet. The design of selective attention based braincomputer interfaces (BCIs) has two major advantages: First, no much training is needed. Second, if properly designed, a steady-state response corresponding to spectral peaks can be elicited, easy to filter and classify. In this paper we study the behaviour of Kohonen Maps as feature selector for a selective attention to auditory stimuli based BCI system. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Feature extraction

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Surface modelling with radial basis functions neural networks using virtual environments

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9th International Work-Conference on Artificial Neural Networks, IWANN 2007

作者： Loápez, Miguel Aángel Pomares, Heáctor Damas, Miguel Diáaz-Estrella, Antonio Prieto, Alberto Pelayo, Francisco De La Plaza Hernaández, Eva Mariáa Department of Computer Architecture and Computer Technology University of Granada Department of Electronic Technology University of Maálaga

ISBN: (纸本)9783540730064

Modelling capabilities of Radial Basis Function Neural Networks (RBFNNs) are very dependent on four main factors: the number of neurons, the central location of each neuron, their associated weights and their widths (radii). In order to model surfaces defined, for example, as y = f(x,z), it is common to use tri-dimensional gaussian functions with centres in the (X,Z) domain. In this scenario, it is very useful to have visual environments where the user can interact with every radial basis function, modify them, inserting and removing them, thus visually attaining an initial configuration as similar as possible to the surface to be approximated. In this way, the user (the novice researcher) can learn how every factor affects the approximation capability of the network, thus gaining important knowledge about how algorithms proposed in the literature tend to improve the approximation accuracy. This paper presents a didactic tool we have developed to facilitate the understanding of surface modelling concepts with ANNs in general and of RBFNNs in particular, with the aid of a virtual environment. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Neural networks

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