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Gait authentication using distributed source coding

Gait authentication using distributed source coding

引用

IEEE International Conference on Image Processing

作者： S. Argyropoulos D. Tzovaras D. Ioannidis M. G. Strintzis Informatics and Telematics Institute Centre for Research and Technology Hellas Greece Department of Electrical and Computer Engineering Aristotle University of Thessaloniki Greece

A novel gait authentication scheme based on distributed source coding principles is proposed. Biometric recognition is formulated as a coding problem with noisy side information at the decoder and error correcting codes are employed for user authentication. The effective exploitation of the noise channel statistics in the decoding process improves performance. It is also shown that the proposed method increases the security of the stored biometric templates. Gait recognition is based on the extraction of depth data from human silhouettes and a set of discriminative features. The experimental results demonstrate the validity of the proposed method.

关键词： Authentication Source coding Biometrics Decoding Error correction codes Statistical distributions Data security Information security Data mining Humans

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Performance validation of microarray analysis methods

Performance validation of microarray analysis methods

引用

IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： M. Zervakis M. E. Blazadonakis A. Banti D. Kafetzopoulos V. Danilatou M. Tsiknakis Department of Electronic and Computer Engineering Technical University of Crete Greece Institute of Molecular Biology and Biotechnology Foundation for Research and Technology Hellas FORTH USA Institute of Computer Science Biomedical Informatics Laboratory Foundation for Research and Technology Hellas FORTH USA

Following the rapid development of gene selection methods, several comparison studies have been reported for ranking methods on various datasets. In order to reduce bias in performance measures, most studies use an evaluation scheme based on cross-validation. In this paper we focus on the methodology of evaluation itself and address methodological problems using three representative algorithms on two public datasets. More specifically, the paper discusses the need of an independent test-set to reduce bias associated with cross-validation, the use of case specific considerations for generalization, as well as other measures that reflect stability and consistency of the result. Such measures reflect the influence of the actual dataset distribution on the performance of gene selection methods.

关键词： Performance analysis Filters Cancer Biomedical measurements Genomics Bioinformatics Stability Humans System testing Decision support systems

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3D facial expression recognition using swarm intelligence

3D facial expression recognition using swarm intelligence

引用

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

作者： Iordanis Mpiperis Sotiris Malassiotis Vassilios Petridis Michael G. Strintzis Informatics and Telematics Institute Centre for Research and Technology Hellas Thessaloniki Greece Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece

In this paper, we present a novel approach for 3D facial expression recognition which is inspired by the advances of ant colony and particle swarm optimization (ACO and PSO respectively) in the field of data mining. Anatomical correspondence between faces is first established using a generic 3D face model which is deformed elastically to match the facial surfaces. Surface points are then used as a basis for classification according to a set of classification rules, which are discovered by an ACO/PSO-based rule discovery algorithm. The performance of the proposed algorithm has been evaluated on the BU-3DFEDB facial expression database where a total recognition rate of 92.3% was achieved.

关键词： Face recognition Particle swarm optimization Deformable models Data mining Ant colony optimization Birds Space technology Psychology Prototypes informatics

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Image frame fusion using 3D anisotropic diffusion

Image frame fusion using 3D anisotropic diffusion

引用

International International Symposium on computer and Information Sciences (ISCIS)

作者： Fatih Kahraman C. Deniz Mendi Muhittin Gokmen Informatics Institute TUBITAK Marmara Research Center Kocaeli Turkey Computer Engineering Department ITU Istanbul Turkey

In this paper, a modified 3D anisotropic diffusion method is proposed to improve the multi-frame image fusion performance. Multi frame image sequence is considered to be composed of aligned and warped images. The goal of this approach is to obtain a restored image from the aligned and warped image sequence, where alignment error and Gaussian noise are reduced. The proposed method consists of medium band stack filter and tree-structured 3D diffusion filter.

关键词： Anisotropic magnetoresistance Image sequences Image restoration Layout Shape Filters Image resolution Filtering informatics Image fusion

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Fast Power-Up Active Link Protection in Autonomous Distributed Transmitter Power Control

Fast Power-Up Active Link Protection in Autonomous Distribut...

引用

International Wireless Communications and Mobile Computing Conference, IWCMC

作者： Savvas Gitzenis Nicholas Bambos The Center of Research and Technology Informatics and Telematics Institute Greece Department of Computer & Communication Engineering University of Thessally Greece Electrical Engineering Department and Management Science and Engineering Department University of Stanford USA

ISBN: (纸本)9781424422012

In this work, we propose an enhancement to the DPC/ALP (distributed power control with active link protection) algorithm that allows fast power ramp-up without compromising the ALP guarantee. The original DPC algorithm was first augmented with ALP to provide absolute performance guarantees. The basis of active link protection lies on constraining the rate of the new links' transmission power increase during the admission process, inducing a trade-off between the duration of the admission process and the network capacity reserved for absorbing the SINR fluctuations. Thus, to minimize the capacity loss, power-up should be slow, prolonging admission delay. In the new scheme, the power-up is accelerated when congestion is low, via test transmissions. Specifically, pairs of mini slots are interleaved between payload-carrying slots. In the first mini- slot, a link has the opportunity to carry out a test transmission in the wireless channel at an arbitrarily high power level, greater than what DPC/ALP allows. The purpose of this test transmission is to communicate the desired transmission power to the other links in the network neighborhood. The latter respond in the second mini-slot, indicating their distress if the first mini-slot transmissions generated excessive interference to their receivers. The absence of transmission at the second mini-slot signifies that no link has opposed, thus the link is free to use the first mini-slot's high power level in their subsequent slots, realizing the fast power ramp up. In contrast, if a transmission is sensed in the second mini-slot (emanating from one or more links in distress - typical under network congestion, when links are closely packed), the power ramp up will revert to the standard increase of DPC/ALP.

关键词： Interference Signal to noise ratio Receivers Noise Gain Wireless sensor networks Transmitters

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Optimal pheromone distribution for ANCOR

Optimal pheromone distribution for ANCOR

引用

IEEE Swarm Intelligence Symposium, SIS

作者： Deniz Demiray D. Turgay Altilar Research assistant at Informatics Institute Istanbul Technical University Maslak Istanbul Turkey Informatics Institute and Department of Department of Computer Engineering İstanbul Technical University Maslak Istanbul Turkey

This work investigates the utilization of a new pheromone distribution model for ANCOR. ANCOR is a novel routing algorithm for sensor networks. The main idea behind the algorithm is imitating the real acts of ants for finding new food resources and bringing them to their nests. A new pheromone distribution model for ANCOR, i.e. optimal pheromone distribution model will be presented, and its performance profits over the existing model will be discussed.

关键词： Routing Broadcasting Ant colony optimization Roads Particle swarm optimization USA Councils Algorithm design and analysis Capacitive sensors Stochastic processes Optimization methods

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The GALILEA program new curricula for engineering and natural sciences 36

The GALILEA program new curricula for engineering and natura...

引用

36th SEFI Annual Conference 2008

作者： Jeschke, Sabina Dahlmann, Nina Elsner, Maria Natho, Nicole Schröder, Christian Wilke, Marc University of Stuttgart Department for Computer Science Electrical Engineering and Information Technology Center of Information Technologies and Institute of Information Technology Services Stuttgart70553 Germany Berlin University of Technology School of Mathematics and Natural Sciences Center for Multimedia in Education and Research Berlin10623 Germany

ISBN: (纸本)9789087905712

academic education of engineers and natural scientists has to be adapted to today's social and economic needs. One of the goals of the project GALILEA [1] is to design and implement innovative new undergraduate courses that attract a gender-balanced ratio of students at the Berlin institute of technology. In this article we describe the design and implementation of an exemplary new course. The bachelor course of "Natural Sciences in the Information Society" was the first of the GALILEA courses starting in winter term 2007/08. Its goals and innovations are illustrated in detail.

关键词： Curricula

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Fuzzy Fusion for Affective State Assessment in Distance Learning Based on Image Detection

Fuzzy Fusion for Affective State Assessment in Distance Lear...

引用

2008 International Conference on Audio，Language and Image Processing(2008国际声音、语言、图像过程大会)

作者： Kuoan Hwang Chiahao Yang Department of Computer Science and Information Engineering & Graduate Institute of Networking and Co Graduate Institute of Informatics Doctoral program Chaoyang University of Technology

Distance learning is a learning style that can overcome the limitation of time and space. Because of the distance, teachers can not handle the student's learning situation, and they do not know whether the student is attentive, drowsy or absent. If teachers can know the student's affective state, they can overcome the difficult. The research applies the image recognition technologies to capture the face images of students when they are learning and analyzes their face features to evaluate the student's affective state by Fuzzy Integral. Finally, teachers can monitor the student's behavior by the detection results on the system interface.

关键词： Distance learning Skin computers Distance measurement Face Image color analysis Education

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Supporting end-to-end resource virtualization for web 2.0 applications using service oriented architecture

Supporting end-to-end resource virtualization for web 2.0 ap...

引用

2008 IEEE Globecom Workshops, GLOBECOM 2008

作者： Papagianni, C. Karagiannis, G. Tselikas, N.D. Sfakianakis, E. Chochliouros, I.P. Kabilafkas, D. Cinkler, T. Westberg, L. SjÖdin, P. Hidell, M. De Groot, S. Heemstra Kontos, T. Katsigiannis, C. Pappas, C. Antonakopoulou, A. Venieris, I.S. School of Electrical and Computer Engineering National Technical University of Athens Greece CTIT and Department of Electrical Engineering Mathematics and Computer Science University of Twente Enschede Netherlands Department of Telecommunications Science and Technology University of Peloponnese Greece Research Programs Section Labs and New Technologies Division ellenic Telecommunications Organization S.A. Switching and Services Laboratory Labs and New Technologies Division Hellenic Telecommunications Organization S.A. Greece Department of Telecommunications and Media Informatics Budapest University of Technology and Economics Hungary Ericsson Research Stockholm Sweden School of Information and Communication Technology Royal Institute of Technology Stockholm Sweden Twente Institute for Wireless and Mobile Communication Enschede Netherlands Siemens IT Solutions and Services Athens Greece

ISBN: (纸本)9781424430628

In recent years, technologies have been introduced offering a large amount of computing and networking resources. New applications such as Google AdSense and BitTorrent can profit from the use of these resources. An efficient way of discovering and reserving these resources is by using the Service Oriented Architecture (SOA) concept. SOA can be considered as a philosophy or paradigm in organizing and utilizing services and capabilities that may be under the control of different ownership domains. This paper presents an architecture that can be used to support end-to-end resource virtualization for Web 2.0 applications and in particular for peer-to-peer applications by using the Service Oriented Architecture concept. © 2008 IEEE.

关键词： Information services

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Expression-Compensated 3D Face Recognition with Geodesically Aligned Bilinear Models

Expression-Compensated 3D Face Recognition with Geodesically...

引用

IEEE International Conference on Biometrics: Theory, Applications, and Systems (BTAS)

作者： Iordanis Mpiperis Sotiris Malassiotis Michael G. Strintzis Informatics and Telematics Institute Centre for Research and Technology Hellas Thessaloniki Greece Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece

In this paper, we present a technique for addressing 3-dimensional face recognition in presence of facial expressions using a bilinear model. The bilinear model allows decoupling the impact of identity and expression on face appearance and encoding their contribution in separate control parameters. This is achieved by first representing faces as parametric surface models described by a fixed length parameter vector. A generic face model is fitted to each face based on a novel technique that relies on geodesic distances to find implicitly corresponding facial landmarks between the model and the face in hand. Model parameters are then used for bilinear decomposition. The experimental results on the publicly available BU-3DFE face database demonstrate the effectiveness of our technique.

关键词： Face recognition Deformable models Face detection Databases Iterative closest point algorithm Surface fitting Encoding Wavelet coefficients Nose Skin

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