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9th International Conference on Control, Decision and Information Technologies, CoDIT 2023

作者： Gómez, Juan Carlos Sad, Gonzalo Daniel Fceia Universidad Nacional de Rosario Cifasis Lab. for Systems Dynamics and Signal Processing Rosario Argentina

ISBN: (纸本)9798350311402

Recursive identification algorithms for the parameter estimation of linear systems from multilevel quantized outputs are introduced in this paper. The proposed algorithms are proved to be optimal in the sense that they minimize the a posteriori parameter estimation error covariance matrix. Numerical simulations are carried out to illustrate their performance for different quantization steps and signal-to-Noise Ratios, as well as their capability to track time varying parameters. © 2023 IEEE.

关键词： Linear systems

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Optimal Parameter Estimation Algorithms from Quantized Outputs

Optimal Parameter Estimation Algorithms from Quantized Outpu...

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International Conference on Control, Decision and Information Technologies (CoDIT)

作者： Juan Carlos Gómez Gonzalo Daniel Sad Lab. for Systems Dynamics and Signal Processing FCEIA Universidad Nacional de Rosario and CIFASIS Rosario Argentina

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Feature combination based on Belief Function Theory for online signature verification

Feature combination based on Belief Function Theory for onli...

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Conferencia Latinoamericana En Informatica (CLEI)

作者： Marianela Parodi Juan C. Gómez Lab. for System Dynamics & Signal Processing Universidad Nacional de Rosario & CIFASIS Rosario Argentina

ISBN: (纸本)9781509016341

One of the most challenging problems in online signature verification is to select the best features to model the signatures. A widely used technique to address this problem is to combine different feature sets selected by different criteria. In this paper, the combination of three different feature sets, viz., an automatically selected feature set, a feature set relevant to Forensic Handwriting Experts (FHEs), and a global feature set, on the basis of a score level fusion scheme, is proposed. In order to address the problem of conflicting results appearing when several classifiers are being used, the proposed combination is performed within the framework of the Belief Function Theory (BFT). Two different models, namely, the Denoeux and the Appriou models, are used to embed the problem within this framework, where the fusion is performed resorting to two well-known combination rules, namely, the Dempster-Shafer (DS) and the Proportional Conflict Redistribution (PCR5) one. Experimental results on a publicly availab.e database, prove that the proposed fusion scheme allows the system to have a very good trade-off between verification results and reliability.

关键词： Decision support systems Radio frequency

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Binary pattern flavored feature extractors for Facial Expression Recognition: An overview

Binary pattern flavored feature extractors for Facial Expres...

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Proceedings of the International Convention MIPRO

作者： Rasmus Lyngby Kristensen Zheng-Hua Tan Zhanyu Ma Jun Guo Section of Image Analysis and Computer Graphics Technical University of Denmark Kgs. Lyngby Denmark Signal and Information Processing section (SIP) Aalborg University Aalborg Denmark Pattern Recognition and Intelligent System Lab. Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781479981748

This paper conducts a survey of modern binary pattern flavored feature extractors applied to the Facial Expression Recognition (FER) problem. In total, 26 different feature extractors are included, of which six are selected for in depth description. In addition, the paper unifies important FER terminology, describes open challenges, and provides recommendations to scientific evaluation of FER systems. Lastly, it studies the facial expression recognition accuracy and blur invariance of the Local Frequency Descriptor. The paper seeks to bring together disjointed studies, and the main contribution is to provide a solid overview for future research.

关键词： Feature extraction Face Face recognition Databases Three-dimensional displays Accuracy Gold

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Online signature verification: Improving performance through pre-classification based on global features

Online signature verification: Improving performance through...

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17th International Conference on Image Analysis and processing, ICIAP 2013

作者： Parodi, Marianela Gómez, Juan Carlos Lab. for System Dynamics and Signal Processing FCEIA Universidad Nacional de Rosario Argentina

ISBN: (纸本)9783642411892

In this paper, a pre-classification stage based on global features is incorporated to an online signature verification system for the purposes of improving its performance. The pre-classifier makes use of the discriminative power of some global features to discard (by declaring them as forgeries) those signatures for which the associated global feature is far away from its respective mean. For the remaining signatures, features based on a wavelet approximation of the time functions associated with the signing process, are extracted, and a Random Forest based classification is performed. The experimental results show that the proposed pre-classification approach, when based on the apppropriate global feature, is capable of getting error rate improvements with respect to the case where no pre-classification is performed. The approach also has the advantages of simplifying and speeding up the verification process. © 2013 Springer-Verlag.

关键词： Classification (of information)

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Performance Evaluation for Cooperative ADF Relaying V2I Communications with Burst transmission and PSA-CE schemes Over Quasi-Static Rayleigh Fading channels

Performance Evaluation for Cooperative ADF Relaying V2I Comm...

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17th International IEEE Conference on Intelligent Transportation systems & The Asia-Pacific Council on systems Engineering Conference 2014

作者： Gilwon Seo Min Baek Chungha Bong Kyunbyoung Ko the ConvergenceInformation Technology Research Center for Next-Generation Intelligent Transport System (C-ITRC for NGITS) the Communication and Signal Processing Lab.(CSPL)the Department of IT ConvergenceKorea National University of Transportation50 Daehak-roChungju-siChungbuk380-702 Korea the Department of Control and Instrumentation Engineering Korea National University of Transportation50 Daehak-roChungju-siChungbuk380-702 Korea

In this paper,we propose the analytical approach for adaptive decode-and-forward(ADF) relaying vehicle-toinfrastructure(V2I) schemes consisting of ND-symbol burst data transmission based on pilot symbol assisted-channel estimation(PSA-CE) methods over quasi-static Rayleigh fading *** first,we focus on the error-event at relaying on board equipments(OBEs) for ND-symbol burst data transmission,whereas previous researches considered one data symbol transmission so that they showed the best performance *** considering ND-symbol burst for ADF relaying schemes,we derive an exact bit error rate(BER) expression which can be the performance of practical ***,the practical channel estimation(CE) process is considered by pilot symbols ***,we investigate the effects of both a CE error and an estimated noise variance,which can be obtained by pilot symbol assisted(PSA)-CE methods,on the received signal-to-noise ratio(SNR) and ***,the average BER is derived in approximated closed-form expression for an arbitrary link *** derived analytical approach is verified based on the number of relaying OBEs,pilots,and data *** accuracy is confirmed by comparison with simulation results.

关键词： SNR Performance Evaluation for Cooperative ADF Relaying V2I Communications with Burst transmission and PSA-CE schemes Over Quasi-Static Rayleigh Fading channels Rayleigh ADF

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Performance Analysis of Cooperative HADF Relaying V2I Communication systems for ND-symbol Burst Transmission using PSA-CE methods Over Quasi-Static Rayleigh Fading channels

Performance Analysis of Cooperative HADF Relaying V2I Commun...

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17th International IEEE Conference on Intelligent Transportation systems & The Asia-Pacific Council on systems Engineering Conference 2014

作者： Min Baek Gilwon Seo Chungha Bong Kyunbyoung Ko the Convergence-Information Technology Research Center for Next-Generation Intelligent Transport System (C-ITRC for NGITS) the Communication and Signal Processing Lab.(CSPL)the Department of IT ConvergenceKorea National University of Transportation50 Daehak-roChungju-siChungbuk380-702 Korea the Department of Control and Instrumentation Engineering Korea National University of Transportation50 Daehak-roChungju-siChungbuk380-702 Korea

In this paper,we derive the average symbol error rate(SER) for the ND-symbol burst hybrid adaptive decodeor-amplify-forward(HADF) relaying vehicle-to-infrastructure(V2I) communication systems over quasi-static independent and non-identical distributed(INID) Rayleigh fading *** proposed analytical approach includes channel estimation(CE)errors generated by practical pilot symbol assisted-CE(PSACE) ***,based on the error-events at relaying on board equipments(OBEs) for ND-symbol burst data transmission,the conditional SER expression has been derived as an exact ***,the approximated average SER(ASER)expressions are presented as the closed-forms and their accuracy is confirmed by the comparison with simulation ***,we can conclude that our analytical expressions are tractable forms,and can be used as a tool to verify effects of an erroneous detection and hybrid transmission at each relaying OBE on the combined signal-to-noise ratio(SNR) and ASER for cooperative HADF relaying communication systems.

关键词： SNR ADF Performance Analysis of Cooperative HADF Relaying V2I Communication systems for ND-symbol Burst Transmission using PSA-CE methods Over Quasi-Static Rayleigh Fading channels Rayleigh

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Novel scheme of real-time direction finding and tracking of multiple speakers by robot-embedded microphone array

Novel scheme of real-time direction finding and tracking of ...

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1st International Conference on Robot Intelligence Technology and Applications, RiTA 2012

作者： Su, Daobilige Sekikawa, Masashi Nakazawa, Kazuo Hamada, Nozomu Signal Processing Lab. School of Integrated Design Engineering Keio University Hiyoshi 3-14-1 Yokohama 223-8522 Japan Department of System Design Engineering Keio University Hiyoshi 3-14-1 Yokohama 223-8522 Japan

ISBN: (纸本)9783642373732

Recently, interest on artificial robot audition is growing for developing human-robot interaction. The main purposes of an artificial audio system mounted on mobile robot are localizing sound sources, separating speech signal that is relevant to a particular speaker such as robot's master, and processing speech sources to extract useful information such as master's uttering commands. This paper reports a novel proposed method of a speaker's direction tracking algorithm, and a realization of the real tracking system on a mobile robot. Basic approach of this study belongs to a category of direction finding known as sparseness-based one which employs time-frequency decomposition and disjoint property between different speech signals. The novel points in the proposed source tracking exist on a reliable data selection from time-frequency cells and the application of mean shift tracking to the kernel density estimator derived from these reliable time-frequency components. A wheel-based mobile robot is developed and built-in audio processing system. Experiments are conducted and demonstrate the ability to localize in real environments. © 2013 Springer-Verlag.

关键词： Mobile robots

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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On the use of vocal-tract approximations for instrumental quality assessment 10

On the use of vocal-tract approximations for instrumental qu...

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10th ITG Symposium on Speech Communication, ITGspeech 2012

作者： Norrenbrock, Christoph R. Heute, Ulrich Hinterleitner, Florian Digital Signal Processing and System Theory Christian-Albrechts-Universität zu Kiel Kiel24143 Germany Quality and Usability Lab. Telekom Innovation Laboratories TU Berlin Berlin10587 Germany

ISBN: (纸本)9783800734559

The nature of linear prediction becomes most vivid through the relation between predictor and reflection coefficients in the context of the source-filter model of speech production. In particular, an approximation of the vocal-tract shape can be recursively calculated using the reflection coefficients only. To date, it is not fully clear to what extent such an approximation can be exploited for a perception-related quality analysis of connected speech signals. In this paper, we will review known approaches from literature and elab.rate on a novel extension towards instrumental quality assessment of synthesized speech signals. © VDE VERLAG GMBH • Berlin • Offenbach.

关键词： Reflection

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