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International Conference on Image Analysis and Processing Workshops (ICIAPW)

作者： Efstathios Onasoglou Athanasios Mademlis Dimitrios Katsikas Petros Daras Michael Strintzis Informatics and Telematics Institute Centre for Research and Technology Hellas Greece Altanet SA Thessaloniki Greece Information Processing Labaratory Department of Electrical & Computer Engineering Aristotle University of Thessaloniki Greece

In this paper a working multimedia asset management system is presented which provides the means for storage, annotation, retrieval and re-use of any multimedia data such as 3D objects, images, sound, video and text. The working prototype is modular, customizable, secure, offers intranet and Internet connectivity and also software inter-operability as it can be compatible with various well- known, established database and ontology standards. The main innovative aspects of the proposed system are the efficient combination of the semantic aspects with multimedia data and the retrieval engine of the system which combines state-of-the-art 3D content-based algorithms and novel semantic driven, relevance feedback methods.

关键词： Prototypes Documentation Multimedia systems Image storage Information retrieval Multimedia databases Asset management Image retrieval Software prototyping Internet

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Speckle noise reduction in SAR imaging using lattice filters based subband decomposition

Speckle noise reduction in SAR imaging using lattice filters...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Gokhan Karasakal I. Erer Informatics Institute Advanced Technologies in Engineering.Computer Science and Eng Istanbul Technical University Istanbul Turkey Electronics and Communication Department I.T.U. Faculty of Electrical and Electronic Engineering Istanbul Turkey

A new speckle reduction algorithm based on lattice filters for SAR imaging is presented. In the new method, the subband decomposition of the speckled image is performed using lattice filters. The noisy image is decomposed into subband images using high-pass and low-pass filters having lattice structure, then a threshold value is estimated according to noise variance in each subband and soft-thresholding is applied on the subband images. The despeckled image is obtained from the thresholded subband images using the inverse lattice filter. The proposed speckle reduction method is applied to RADARSAT/SAR images. The performance of the proposed method has also been compared with median filtering, and discrete and stationary wavelet transform based speckle reduction methods. Results show that the proposed method may be used efficiently for speckle noise reduction in SAR images.

关键词： Speckle Noise reduction Radar polarimetry Lattices Discrete wavelet transforms Filter bank Low pass filters Channel bank filters Image reconstruction Filtering

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A systematic approach to quantifying evolutionary functional trends across the universal tree of life

A systematic approach to quantifying evolutionary functional...

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7th IEEE International Conference on Bioinformatics and Bioengineering, BIBE

作者： Alterovitz, Gil Muso, Taro Malalur, Paresh Ramoni, Marco F. Division of Health Sciences and Technology Harvard Medical School Massachusetts Institute of Technology Boston MA United States Children's Hospital Informatics Program Boston MA United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA United States Harvard Partners Center for Genetics and Genomics Harvard Medical School Boston MA United States

ISBN: (纸本)1424415098

The accumulation of genomic and proteomic data of many organisms presents an opportunity to analyze entire phylogenetic trees in a systematic, quantified manner. The universal tree of life, constructed by genomic data, provides an evolutionary context for proteomic data of individual organisms. Using proteomic information mapped to biological functions, we survey the tree of life for evolutionary trends, where trends are low p-value linear regressions of relative protein diversity against an evolutionary timeline. These trends provide quantified perspectives across evolution that would be otherwise difficult to discern from the large amount of available bioinformatic data. We analyzed 22,762 functions across 167 proteomes for approximately 3.8 million information content calculations. Of particular interest is the rise of protein-protein interactions along the path of mammalian evolution. Of general interest are the numerous uncovered trends that open the door to future queries of focused scope. ©2007 IEEE.

关键词： Information theory

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Self-tuning PD+I fuzzy logic controller with minimum number of rules

Self-tuning PD+I fuzzy logic controller with minimum number ...

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IEEE International Conference on Systems, Man and Cybernetics

作者： F. C. Teng A. Lotfi A. C. Tsoi Department of Electrical & Computer Engineering Polytechnic University of Puerto Rico USA School of Computing & Informatics Nottingham Trent University Nottingham UK Monash e-Research Centre Monash University VIC Australia

A novel 9 rules self-tuning PD+I fuzzy logic controller applicable for a class of nonlinear plants is proposed in this paper. The controller comprises of three separate fuzzy logic controllers with each uses minimum number of rules and the output scaling factor is tuned automatically depending on the tracking error dynamic conditions. The controller is applied to a two-link revolute robot for the tracking control. Simulation results show that the robustness and tracking performance of the proposed controller is comparable to standard PD+I fuzzy logic controller at low and medium speed motions. However, the performance of the proposed new design far exceeds the standard design at high speed motions.

关键词： Fuzzy logic Automatic control Robotics and automation Three-term control Motion control Nonlinear control systems Control systems Manipulators Industrial control Adaptive control

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Eikonomia-An Integrated Semantically Aware Tool for Description and Retrieval of Byzantine Art Information

Eikonomia-An Integrated Semantically Aware Tool for Descript...

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International Conference on Tools for Artificial Intelligence (ICTAI)

作者： Konstantinos N. Vavliakis Andreas L. Symeonidis Georgios T. Karagiannis Pericles A. Mitkas Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece Intelligent Systems and Software Engineering Laboratory Informatics and Telematics Institute CERTH Thessaloniki Greece Sacred Convent of the Annunciation ORMYLIA Art Diagnosis Centre Chalkidiki Greece

ISBN: (纸本)9780769530154;076953015X

Semantic annotation and querying is currently applied on a number of versatile disciplines, providing the added-value of such an approach and, consequently the need for more elaborate - either case-specific or generic - tools. In this context, we have developed Eikonomia: an integrated semantically-aware tool for the description and retrieval of Byzantine artwork Information. Following the needs of the ORMYLIA Art Diagnosis Center for adding semantics to their legacy data, an ontology describing Byzantine artwork based on CIDOC-CRM, along with the interfaces for synchronization to and from the existing RDBMS have been implemented. This ontology has been linked to a reasoning tool, while a dynamic interface for the automated creation of semantic queries in SPARQL was developed. Finally, all the appropriate interfaces were instantiated, in order to allow easy ontology manipulation, query results projection and restrictions creation.

关键词： Information retrieval Art Ontologies Cultural differences Data mining Artificial intelligence Documentation Relational databases Intelligent systems Software engineering

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On A Web-Graph-Based Micronetwork Architecture for SoCs

On A Web-Graph-Based Micronetwork Architecture for SoCs

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50th IEEE International Midwest Symposium on Circuits and Systems (MWSCAS'07), vol.3

作者： Ling Wang Shouye Piao Yingtao Jiang Juyeon Jo Lihong Zhang Department of Computer Science Harbin Institute of Technology Harbin Heilongjiang China Department of Electrical and Computer Engineering University of Nevada Las Vegas NV USA School of Informatics University of Nevada Las Vegas NV USA Engineering and Applied Science Memorial University of Newfoundland Saint John's NEW Canada

From System-on-chip to Network-on-chip, the main dissimilarity is replacing the bus with the network. How connect, how formative network function is related to topology structure. In this paper we propose a topology structure for NoC, and compare it with mesh, torus, the fat tree, octagon, spidergon topology networks by five kinds of mainly properties: node degree, network diameter, connectivity, the average most short-circuit path and the average shortest wire length. Experiment results show that this topology has better performance on cost/performance layout.

关键词： Network-on-a-chip Network topology Integrated circuit interconnections System-on-a-chip Delay effects Wiring Power system interconnection Protocols computer architecture computer science

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$N{\ast}$Nakagami: A Novel Stochastic Model for Cascaded Fading Channels

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IEEE Transactions on Communications 2007年第8期55卷 1453-1458页

作者： George K. Karagiannidis Nikos C. Sagias P. Takis Mathiopoulos Division of Telecommunications Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece National Centre for Scientific Research Demokritos Agia Paraskevi Institute of Informatics and Telecommunications Athens Greece Institute for Space Applications and Remote Sensing National Observatory of Athens Athens Greece

A generic and novel distribution, referred to as Nakagami, constructed as the product of N statistically independent, but not necessarily identically distributed, Nakagami- m random variables (RVs), is introduced and analyzed. The proposed distribution turns out to be a very convenient tool for modelling cascaded Nakagami- m fading channels and analyzing the performance of digital communications systems operating over such channels. The moments-generating, probability density, cumulative distribution, and moments functions of the N * Nakagami distribution are developed in closed form using the Meijer's G -function. Using these formulas, generic closed-form expressions for the outage probability, amount of fading, and average error probabilities for several binary and multilevel modulation signals of digital communication systems operating over the N * Nakagami fading and the additive white Gaussian noise channel are presented. Complementary numerical and computer simulation performance evaluation results verify the correctness of the proposed formulation. The suitability of the N * Nakagami fading distribution to approximate the lognormal distribution is also being investigated. Using Kolmogorov--Smirnov tests, the rate of convergence of the central limit theorem as pertaining to the multiplication of Nakagami- m RVs is quantified.

关键词： Stochastic processes Fading Nakagami distribution Digital communication Random variables Performance analysis Closed-form solution Error probability Digital modulation Additive white noise

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Adaptive Frame Interpolation for Wyner-Ziv Video Coding

Adaptive Frame Interpolation for Wyner-Ziv Video Coding

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IEEE Workshop on Multimedia Signal Processing

作者： Savvas Argyropoulos Nikolaos Thomos Nikolaos V. Boulgouris Michael G. Strintzis Centre for Research and Technology Informatics and Telematics Institute Thessaloniki Greece Electrical and Computer Engineering Department University of Thessaloniki Thessaloniki Greece Signal Processing Institute-ITS Ecole Polytechnique Federale de Lausanne Lausanne Switzerland Department of Electronic Engineering Division of Engineering King''s College UK

ISBN: (纸本)9781424412730

This paper addresses the problem of frame interpolation for Wyner-Ziv video coding. A novel frame interpolation method based on block-adaptive matching algorithm for motion estimation is presented. This scheme enables block size adaptation to local activity within frames using block merging and splitting techniques. The efficiency of the proposed method is evaluated in transform domain Wyner-Ziv video coding. The experimental results demonstrate the superiority of the proposed method over existing frame interpolation techniques.

关键词： Interpolation Video coding Motion estimation Decoding Motion analysis Codecs Automatic voltage control Source coding Smoothing methods Signal processing

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Investigations of the Use of PosEye for Position Measurements

Investigations of the Use of PosEye for Position Measurement...

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Student Conference on Research and Development (SCOReD)

作者： D. V. Viswacheda P. Surireddy M. S. Arifianto M. Y. Hamid E. M. Husni L. Barukang School of Engineering and Information Technology Universiti Malaysia Sabah Kota Kinabalu Sabah Malaysia Department of Technology Mathematics and Computer Science University West Trollhattan Sweden School of Electrical Engineering and Informatics Institute of Technology at Bandung Jawa Barat Indonesia

The PosEye system is basically a position measurement system which takes images of the reference. The infra-red LEDs which emits IR lights is captured by the CCD and is used as the reference. In this system the absolute positioning and orientation were made with the help of a PosEye. The PosEye is normally fixed on a robot arm or the object which requires orientation of its own position in correspondence to its reference points in the working area. This paper discusses general ideas about reference markers, set-up procedures, and issues behind the sensor. This mainly includes the principles of PosEye sensor, basics of vision and cameras. The paper details the experiments in which results were obtained through the PosEye system with the help of electronics and PosEye camera. In the experimental setup, the connection of PosEye with the electronic application is presented, the usage of PosEye and the robot control system communication with the PosEye system using coordinate system. The working of the PosEye system is observed by taking images on the reference plate and finding the co-ordinates (x, y, z). The manipulation of the obtained images to the robot for a movement is also studied.

关键词： Position measurement Cameras Robot vision systems Robot control Charge coupled devices Robot sensing systems Robot kinematics Educational institutions Light emitting diodes Virtual reality

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An Adaptive Multiresolution Approach to Fingerprint Recognition

An Adaptive Multiresolution Approach to Fingerprint Recognit...

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IEEE International Conference on Image Processing

作者： Amina Chebira Luis P. Coelho Aliaksei Sandryhaila Stephen Lin William G. Jenkinson Jeremiah MacSleyne Christopher Hoffman Philipp Cuadra Charles Jackson Markus Puschel Jelena Kovacevic Department of Biomedical Engineering and Center for Bioimage Informatics Carnegie Mellon University Pittsburgh PA USA Carnegie Mellon University Pittsburgh PA USA Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA USA Department of Material Sciences and Engineering Carnegie Mellon University Pittsburgh PA USA Dept. of Biomedical Eng. and Center for Bioimage Informatics Carnegie Mellon University Pittsburgh PA USA Dept. of Electrical and Computer Eng. Carnegie Mellon University Pittsburgh PA USA

We propose an adaptive multiresolution (MR) approach to the classification of fingerprint images. The system adds MR decomposition in front of a generic classifier consisting of feature computation and classification in each MR subspace, yielding local decisions, which are then combined into a global decision using a weighting algorithm. In our previous work on classification of protein subcellular location images, we showed that the space-frequency localized information in the MR subspaces adds significantly to the discriminative power of the system. Here, we go one step farther; We develop a new weighting method which allows for the discriminative power of each subband to be expressed and examined within each class. This, in turn, allows us to evaluate the importance of the information contained within a specific subband. Moreover, we develop a pruning procedure to eliminate the subbands that do not contain useful information. This leads to potential identification of the appropriate MR decomposition both on a per class basis and for a given dataset. With this new approach, we make the system adaptive, flexible as well as more accurate and efficient.

关键词： Fingerprint recognition Image matching Energy resolution Image resolution Biometrics Biology computing Wavelet packets Biomedical informatics Biomedical computing Biological materials

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