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20th IEEE International Conference on Tools with Artificial Intelligence

作者： Saydam, Samer R. El rube', Ibrahim A. Shoukry, Amin A. CS Department Computing and Information Technology College AASTMT Egypt EC Eng. Dept. College of Engineering and Technology AASTMT Egypt Computer Science and Automatic Control Department Faculty of Engineering Alexandria University Egypt

ISBN: (纸本)9780769534404

This paper proposes a robust algorithm for detecting interest points based on the NonsubSampled Contourlet Transform (NSCT). The NSCT provides multiscale decomposition with directional filters at each scale. Furthermore, NSCT is very efficient in extracting the geometric information of images and therefore it has very good feature localization. The NSCT-based point detector is compared to the widely used Harris and Difference of Gaussian (DoG) interest point detectors. The experimental results reveal the robustness of the proposed algorithm to rotation, scale and viewpoint changes.

关键词： Interest point detection corner detector local features nonsubsampled contourlet transform (NSCT)

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Gypsum waste reduction through stabilization for trench backfill

Gypsum waste reduction through stabilization for trench back...

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GeoCongress 2008: Geotechnics of Waste Management and Remediation

作者： Rahman, Md. Waliur Ghataora, Gurmel S. Chapman, D.N. Tyrer, Mark Claisse, Peter Ganjian, Essie Department of Civil Engineering School of Engineering University of Birmingham B15 2TT United Kingdom Centre for Environmental Control and Waste Management Imperial College London United Kingdom Department of Civil Engineering Faculty of Engineering and computing Coventry University United Kingdom

ISBN: (纸本)9780784409701

Conventional backfill for utility trenches often comprises of granular crashed rock, which is Type I subbase material as used in road pavement construction. However, the increasing need to preserve resources and to use recovered and recycled materials led to the consideration of using gypsum as a utility trench backfill material. Thus a range of mixtures containing waste gypsum were investigated. During this study it was found that mixes containing waste gypsum, limestone quarry dust and ordinary Portland cement complied with the existing Specifications for trench backfill in terms of unconfined compressive strength as well as durability in respect of loss of strength on soaking and freeze thaw. Leachate tests showed that sulphate levels were also within acceptable limits. Copyright ASCE 2008.

关键词： Gypsum

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Routing and scheduling in Multi-AGV systems based on dynamic banker algorithm

Routing and scheduling in Multi-AGV systems based on dynamic...

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Mediterranean Conference on control and Automation (MED)

作者： Vedran Bobanac Stjepan Bogdan Department of Control and Computer Engineering Faculty of Electrical Engineering and Computing University of Zagreb Croatia

In this paper we propose modified Banker's algorithm for routing and scheduling in multi-AGV systems. A mission path, determined by string algebra is executed in a way that some unsafe states are allowed in order to achieve better utilization of vehicles. Moreover, a method for splitting a mission path is proposed so that number of resources (arcs) needed for mission execution is gradually reduced which provides less restrictions on availability vector, thus allowing more traveling space for other vehicles. Results shown at the end of the paper demonstrate strength of the proposed method compared with standard Banker's algorithm.

关键词： Automation Conferences

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An Illumination Compensation Method for Images under Variable Lighting Condition

An Illumination Compensation Method for Images under Variabl...

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IEEE Conference on Robotics, Automation and Mechatronics

作者： Haibo Wu Ping Jiang Jin Zhu Department of Information and Control Engineering University of Tongji Shanghai China Department of Computing University of Bradford Bradford UK

This paper presents an illumination compensation method for images under variable lighting condition. The algorithm consists of two processes. First, the camera response function is identified as a nonlinear model of the camera under dynamic illumination. Then an image with a wider dynamic range is obtained online by fusing several images taken under different exposures of the same scene. The algorithm is applied to the four-legged robot soccer competition and is verified to be superior to some traditional schemes.

关键词： Lighting Cameras Layout Robot vision systems Brightness Optical imaging Dynamic range control engineering Image enhancement Face detection

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Wavelet de-noising and gradient enhancement in biomedical image processing

Wavelet de-noising and gradient enhancement in biomedical im...

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8th IASTED International Conference on Visualization, Imaging, and Image Processing, VIIP 2008

作者： Procházka, Aleš Hošťálková, Eva Vyšata, Oldřich Department of Computing and Control Engineering Institute of Chemical Technology in Prague Technická 6 166 28 Prague 6 Czech Republic Neurocenter Caregroup Jiráskova 1389 516 01 Rychnov nad Kněžnou Czech Republic

ISBN: (纸本)9780889867598

Detection of specific image components, their visualization and classification belong to main topics of biomedical image processing. The paper is devoted to problems related to the use of discrete wavelet transform (DWT) and the dual-tree complex wavelet transform (DTCWT) for image denoising and to selected methods of its enhancement. The study presents the analysis of results achieved for different wavelet functions and the following application of gradient methods for specific image components detection. The information content of final images is followed both from the medical point of view using the previous experience and numerically through the analysis of image spectral components. The proposed methods indicate the efficiency of the dual-tree complex wavelet transform use in this area.

关键词： Image denoising

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Multi-channel signal segmentation and classification

Multi-channel signal segmentation and classification

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8th IASTED International Conference on Visualization, Imaging, and Image Processing, VIIP 2008

作者： Procházka, Aleš Bartošová, Veronika Vyšata, Oldřich Department of Computing and Control Engineering Institute of Chemical Technology in Prague Technická 6 166 28 Prague 6 Czech Republic Neurocenter Caregroup Jiráskova 1389 516 01 Rychnov nad Kněžnou Czech Republic

ISBN: (纸本)9780889867598

Multi-channel sensors and multi-channel signal analysis form a specific area of general digital signal processing methods with applications in medicine, environmental signal analysis or technology. The paper is devoted to general mathematical methods related to initial signal de-noising, detection of its principal components and segmentation to find its specific parts. Feature detection includes the use of discrete wavelet transform (DWT) and discrete Fourier transform (DFT) for estimation of features invariant to signal shift to form clusters of close data segments. The selforganizing neural networks are then used for signal segments classification. Results are numerically evaluated by statistical analysis of distances of individual feature vector values from the corresponding cluster centers. Proposed methods are used for electroencephalogram (EEG) signal segmentation based upon detection of changes of signal spectral components applied to its first principal component, signal segments feature extraction and their classification. Results achieved are compared for different data sets and different mathematical methods used to detect signal segments features. Numerical results are compared with experience of experts specialized to EEG data analysis to allow further correlation with MR images. Proposed methods are accompanied by the appropriate graphical user interface (GUI) designed in the MATLAB environment.

关键词： Principal component analysis

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Improvement of a fixed point transformations and svd-based adaptive controller

Improvement of a fixed point transformations and svd-based a...

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9th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics, CINTI 2008

作者： Tar, József K. Rudas, Imre J. Bitó, János F. Machado, José A. Tenreiro Kozlowski, Krzysztof R. Institute of Intelligent Engineering Systems Budapest Tech Bécsi út 96/B H-1034 Budapest Hungary Department of Electrotechnical Engineering Institute of Engineering of Porto Rua Dr. Antonio Bernardino de Almeida 4200-072 Porto Portugal Control and Systems Engineering Computing Science and Management Poznan University of Technology ul. Piotrowo 3a 60-965 Poznan Poland

In this paper some refinement of a novel control approach is reported that fits to the "traditional line of thinking" according to which in the most practical cases neither very precise, nor even complete system model is needed for obtaining precise control for dynamical systems. The validity of this statement is briefly pointed out in the most popular approaches as the main idea of the "Robust Sliding Mode / Variable Structure controllers", in the Adaptive Inverse Dynamics and in the Slotine-Li Adaptive controllers based on Lyapunov's 2nd Method, and in a recently published problem tackling using the simple geometric interpretation of the Singular Value Decomposition (SVD). In the present approach the originally proposed convergent, iterative Cauchy sequences are nonlinearly moderated to adaptively control a coupled nonlinear system, the cart plus double pendulum serving as popular paradigm of dynamicall not very well conditioned systems. It is shown that the proposed moderation removes the small sharp fluctuation in the control torque that inherently belonged to the original solution without significantly degrading the control quality. This statement is substantiated by simulation results.

关键词： Singular value decomposition

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Stabilizing Interconnection Characterization for Multi-Agent Systems with Dissipative Properties

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IFAC Proceedings Volumes 2008年第2期41卷 1571-1577页

作者： Sandra Hirche Shinji Hara Institute of Automatic Control Engineering Technische Universität München D-80290 Munich GERMANY Department of Information Physics and Computing The University of Tokyo Tokyo 113-8656 JAPAN

This paper addresses the problem of stabilization and output-synchronization for a network of interconnected nonlinear agents, where each agent is assumed to be dissipative with respect to a specified quadratic supply rate which may differ among the agents. Main results concern the characterization and design of the information exchange structure for stabilization. Applying a linear protocol here, the associated interconnection matrix is characterized based on LMI's, as well as on spectral properties. Additionally a synthesis based on LMI's under structural constraints is proposed. The results are validated in simulations.

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IEEE Transactions on Haptics: Editorial

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IEEE Transactions on Haptics 2008年第1期1卷 2-8页

作者： Edward Colgate, J. Lederman, Susan Prattichizzo, Domenico Barbagli, Federico Basdogan, Cagatay Buss, Martin Ernst, Marc Frisoli, Antonio Gillespie, Brent Grant, Danny Harders, Matthias Hayward, Vincent Jones, Lynette Kajimoto, Hiroyuki Kappers, Astrid Kheddar, Abderrahmane Lin, Ming C. MacLean, Karon Miller, Brian Noma, Haruo Okamura, Allison M. O'Malley, Mareia Ryu, Jeha Tan, Hong Z. Yokokohji, Yasuyoshi Department of Psychology School of Computing Queen's University Canada IEEE Robotics and Automation Society Tübingen Germany Stanford University's Computer Science Department Tübingen Germany Institute of Automatic Control Engineering Technische Universität München Germany Independent Research Group Multisensory Perception and Action Max Planck Institute for Biological Cybernetics Tübingen Germany Department of Applied Mechanics SSSA Japan Research Division Virtual Reality and Telerobotic Systems PERCRO Laboratory Japan Department of Mechanical Engineering Japan Department of Robotics McGill University Canada Computer Vision Lab ETH Zurich Japan Virtual Reality in Medicine Group Japan IEEE CS/RAS Technical Committee on Haptics Japan Department of Electrical and Computer Engineering McGill University Canada Department of Mechanical Engineering MIT Japan University of Electro-Communications Japan Department of Physics and Astronomy Utrecht University Netherlands University of Evry France Chapel Hill United States Department of Computer Science University of British Columbia Canada ATR Knowledge Science Lab United Kingdom Department of Mechanical Engineering Denmark Johns Hopkins University United States Laboratory for Computational Sensing and Robotics United Kingdom Engineering Research Center for Computer-Integrated Surgical Systems and Technology United States Mechanical Engineering and Materials Science Department Rice University United States Korea Republic of Department of Electrical and Computer Engineering Mechanical Engineering and Psychological Sciences Purdue University United States Department of Mechanical Engineering and Science Graduate School of Engineering Kyoto University Japan

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Simple efficient techniques for creating effective 3D impressions from 2D original images

Simple efficient techniques for creating effective 3D impres...

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Signal Processing Algorithms, Architectures, Arrangements and Applications (SPA)

作者： Julian Balcerek Adam Dąbrowski Adam Konieczka Department of Computing Science and Management Chair of Control and System Engineering Division of Signal Processing and Electronic Systems Poznan University of Technology Poznan Poland

In this paper simple techniques based on nonlinear geometric transformations are presented for creating an effective 3D impression (stereovision or illusion of depth) from a single 2D original. Our aim is to propose semi-automatic ways to transform 2D images into their suggestive but plausible 3D anaglyph versions. Three conversion methods based on a binary depth map are proposed and the influence of various RGB component shifts on the 3D impression quality is studied.

关键词： Image color analysis Three dimensional displays Materials Cameras Image segmentation Convergence

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