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Detection methods improving reliability of automatic human tracking system

Detection methods improving reliability of automatic human t...

引用

4th International conference on Emerging Security Information, Systems and Technologies, SECURWARE 2010

作者： Kakiuchi, Hiroto Kawamura, Takao Sasama, Toshihiko Sugahara, Kazunori System Engineering Department Melco Power Systems Co.Ltd Kobe Japan Graduate School of Engineering Tottori University Tottori Japan

ISBN: (纸本)9780769540955

Much recent research is concerned with overcoming limitations of existing video surveillance systems, particularly for use in automatic human tracking systems. This paper presents detection methods which detect a lost target person during track in automatic human tracking system. The detection methods utilize an algorithm which determines the position of neighbors in a system of video cameras. By utilizing this deployed position and the view distance of video cameras, this algorithm also determines the interrelationship cameras in such a network must have in an automatic human tracking system. The system is enhanced by a video monitoring system utilizing mobile agent technologies. Mobile agents are suitable for distributed processing and parallel processing, since they can monitor their own behavior and run on distributed computers. Multiple mobile agents in the system can track numerous people using information gathered from several neighboring video cameras at the same time. Searching a target person at random is irrational when a system is losing the target;additionally, difficulty of detection can arise if the deployed position and/or the view distance of video cameras vary due to other circumstances. Therefore, a robust computation not influenced by these circumstances is needed, and detection methods utilizing the above algorithm were developed to solve these concerns and to improve reliability of this system by re-detecting the lost target. © 2010 IEEE.

关键词： Video cameras

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An accurate crosstalk noise estimation method for two simultaneously switched on-chip VLSI distributed RLCG global interconnects

An accurate crosstalk noise estimation method for two simult...

引用

3rd IEEE International conference on Signal and image processing, ICSIP 2010

作者： Kar, R. Maheshwari, V. Choudhary, A. Singh, A. Mal, A.K. Bhattacharjee, A.K. Department of Electronics and Communication Engg National Institute of Technology Durgapur-9 West Bengal 713209 India

ISBN: (纸本)9781424485949

On-chip inductive effects are becoming predominant in deep submicron (DSM) interconnects due to increasing clock speed, circuit complexity and decreasing interconnect lengths. Inductance causes noise in the signal waveforms, which could adversely affect the performance of the circuit and signal integrity. The traditional analysis of crosstalk in a transmission line begins with a lossless LC representation, yielding a wave equation governing the system response. This paper proposes a difference model approach to derive crosstalk in the transform domain. A closed form solution for crosstalk is obtained by incorporating initial conditions using difference modal approach for distributed RLCG interconnects. We have derived the crosstalk metric for two parallel lines when both are switching simultaneously. A raw evaluation of the crosstalk could be at the origin of a malfunction of the circuit. Cross talk can be analyzed by computing the signal linkage between aggressor or attacker nets and victim nets. The attacker net carries a signal that couples to the victim net through the mutual inductance. In order to determine the effects that this cross talk will have on circuit operation, the resulting voltage expressions at the victim and aggressor must be calculated. This paper proposes a difference model approach for the effective voltages at the victim and aggressor using superposition theorem. The accuracy of our approach is justified by the results obtained from SPICE simulation. ©2010 IEEE.

关键词： Crosstalk

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IMPROVEMENT OF TIMBER CODE READING methods 7

IMPROVEMENT OF TIMBER CODE READING METHODS

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7th International conference of DAAAM Baltic Industrial Engineering

作者： Juurma, M. Tamre, M. Tallinn Univ Technol Dept Mechatron EE-19086 Tallinn Estonia

ISBN: (纸本)9789985599822

In this paper the code marking and reading system is discussed that was created for tracing logs as a part of the EU 6(th) Framework project Indisputable Key. A set of images of codes on logs was acquired in SK Rolpin (SKRP) sawmill in France and an automatic code reading software was developed and initial readability analysis was performed. Machine vision and decoding algorithms were developed and implemented. Code reading algorithm consists mainly of four distinct steps: image preprocessing, image orientation and compression, particle analysis and decoding of the code. This marking and decoding system was created to prove of values that can be gained thorough marking individual logs in sawmill. In parallel two different log code marking schemes were used and compared. Efficiency analysis of the image processing algorithm reveals clear advantages of distinct and application specific algorithms which are analyzed and demonstrated in the paper. In spite of efficiency of the algorithm there exist several methods to increase artificially code contrast and visibility in different conditions. One of code visibility enhancing methods is using externally activated paints for code marks, especially infrared or ultraviolet light activated inks. Performance of this kind of markings is analyzed. Respective code marks are applied to logs and readability is tested. The test results are discussed in this paper and future directions for high effective code marking are given.

关键词： timber coding computer vision fluorescent traceability wood industry

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Variational computing based image inpainting methods by using cellular neural networks

Variational computing based image inpainting methods by usin...

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作者： Gacsádi, Alexandru Department of Electronics University of Oradea Universitatii Str. 1 Oradea 410087 Romania

ISBN: (纸本)9789604741939

image inpainting is an interpolation problem where an image with missing or damaged parts is restored. The most often used image inpainting applications are for pictures or films known or damaged partially. Discarding some unwanted parts, text or objects from the whole image space, special effects can be carried out using image restoration. Complex mathematical models based on partial differential equations (PDE) or variational computing was proposed as techniques for restoring damaged or partially known images. Those methods are computational expensive and difficult to implement, even when a large serial processing computing power is available. The Cellular Neural Networks (CNN) based parallel processing ensures computing-time reduction if the processing algorithm can be implemented on a continuous-time analogue CNN-UM (Cellular Neural/Nonlinear Networks Universal Machine) or using FPGA (Field Programmable Gate Array) implemented emulated digital CNN-UM. Even if variational computing methods are used, the design of CNN templates ensuring the desired processing of the gray-scale image remains an important step. In the present paper, some variational based CNN methods are presented and analyzed that can be used for the reconstruction of damaged or partially known images. Efficiency of these impanting methods can be enhanced by combining them with nonlinear template that ensures the growth of the local properties spreading area along with regional ones.

关键词： image reconstruction

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CUDA based fast implementation of very large matrix computation

CUDA based fast implementation of very large matrix computat...

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11th International conference on parallel and distributed Computing, Applications and Technologies, PDCAT 2010

作者： Sun, Yinghong Tong, Yuanman Department of Computer Science and Technology Hunan International Economics University Changsha Hunan China School of Computer Science National University of Defense Technology Changsha Hunan China

ISBN: (纸本)9780769542874

CUDA(Compute Unified Device Architecture) acceleration of very large scale matrix-vector and matrix-matrix multiplication is presented in this paper. The intrinsic parallelism in the matrix computations are exploited thoroughly. By dividing the entire matrix computation to multiple sub-groups, scalable performance improvement can be achieved using multiple GPUs. The key operations are accelerated by GPU. And the CUDA related data storage, threads hierarchy, and kernel implementation are proposed. Several optimization methods including coalesced global memory access, on-the-fly reduction, bank conflict free shared memory usage, loop unrolling, removing unnecessary synchronization, and concurrent execution on the device through streams are also employed. Experiment results show that about 8.5 times speedup can be achieved for CUDA accelerated matrix multiplication maximally. © 2010 IEEE.

关键词： Graphics processing unit

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parallel frequent patters mining algorithm on GPU

Parallel frequent patters mining algorithm on GPU

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2010 IEEE International conference on Systems, Man and Cybernetics, SMC 2010

作者： Zhou, Jiayi Yu, Kun-Ming Wu, Bin-Chang Depament of Computer Science National Tsing Hua University Hsinchu 300 Taiwan Deparment of Computer Science and Information Engineering Chung Hua University Hsinchu 300 Taiwan

ISBN: (纸本)9781424465880

Extraction of frequent patterns from a transactional database is a fundamental task in data mining. Its applications include association rules, time series, etc. The Apriori approach is a commonly used generate-and-test approach to obtain frequent patterns from a database with a given threshold. Many parallel and distributed methods have been proposed for frequent pattern mining (FPM) to reduce computation time. However, most of them require a Cluster system or Grid system. In this study, a graphic processing unit (GPU) was used to perform FPM with a GPU-FPM to speed-up the process. Because of GPU hardware delimitations, a compact data structure was designed to store an entire database on GPU. In addition, MemPack and CLProgram template classes were also designed. Two datasets with diferent conditions were used to verify the performance of GPU-FPM. The experimental results showed that the speed-up ratio of GPU-FPM can achieve 14.857 with 16 times of threads. ©2010 IEEE.

关键词： Graphics processing unit

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2010 2nd International conference on image processing Theory, Tools and Applications, IPTA 2010

2010 2nd International Conference on Image Processing Theory...

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2010 2nd International conference on image processing Theory, Tools and Applications, IPTA 2010

ISBN: (纸本)9781424472482

The proceedings contain 94 papers. The topics discussed include: indexing of compressed video: methods, challenges, applications;multidimensional particle swarm optimization and applications in data clustering and image retrieval;distributed video coding: status, challenges and outlook;augmented reality: issues, trends and challenges;fusion and classification of multi-source images by SVM with selected features in a kernel space;feature subspaces selection via one-class SVM: application to textured image segmentation;adaptive feature selection for heterogeneous image databases;comparison of feature selection schemes for color texture classification;connectivity feature extraction for spatio-functional clustering of fMRI data;audio-video surveillance system for public transportation;people re-identification by classification of silhouettes based on sparse representation;and a benchmark for background subtraction algorithms in monocular vision: a comparative study.

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Optical image encryption with a polarization-selective diffractive optical element based on interference

Optical image encryption with a polarization-selective diffr...

引用

conference on Information Optics and Optical Data Storage

作者： Zhu, Nan Wang, Yongtian Liu, Juan Xie, Jinghui Tianjin Polytech Univ Engn Res Ctr Solid State Lighting Tianjin Peoples R China Beijing Inst Technol Sch Optoelect Beijing Peoples R China

ISBN: (纸本)9780819483812

Data security techniques based on optical theories and methods have been proposed and widely developed in recent years. Compared with conventional mathematical encryption methods optical security system provides higher processing speed, more information volume, more encryption free-degree as well as its multi-dimension and parallel processing abilities. In this paper we proposed a novel architecture for optical image encryption with polarization-selective diffractive optical element (PDOE) based on interference theory. A target image is firstly encoded into two phase-only distributions and then these phase distributions are encrypted into the etched surface-relief pattern of a single PDOE mask. In the process of optical image decryption, when the working wavelength and the system configuration are correct, the PDOE mask with the encoded information for the target image can generate two desired polarized wavefronts by modulating the incident light beam. These two wavefronts interfere and then generate the decrypted image. The encoding algorithm to generate the phase-only distributions is simple and it does not need iterative process. The optical realization for image decryption also has the advantages of easier installation and collimation since all the optical elements are in a same optical axis. The employment of the PDOE mask in this optical security system will highly increase the information security and still maintain the parameter sensitivity in an acceptable region. Numerical simulation is performed to demonstrate the validity of this new proposed method.

关键词： Optical security polarization-selective diffractive optical element interference

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A REVERSIBLE-JUMP MCMC ALGORITHM FOR ESTIMATING THE NUMBER OF ENDMEMBERS IN THE NORMAL COMPOSITIONAL MODEL. APPLICATION TO THE UNMIXING OF HYPERSPECTRAL imageS

A REVERSIBLE-JUMP MCMC ALGORITHM FOR ESTIMATING THE NUMBER O...

引用

2010 IEEE International conference on Acoustics, Speech, and Signal processing

作者： Eches, Olivier Dobigeon, Nicolas Tourneret, Jean-Yves Univ Toulouse IRIT INP ENSEEIHT TeSA F-31071 Toulouse 7 France

ISBN: (纸本)9781424442966

In this paper, we address the problem of unmixing hyperspectral images in a semi-supervised framework using the normal compositional model recently introduced by Eismann and Stein. Each pixel of the image is modeled as a linear combination of random endmembers. More precisely, endmembers are modeled as Gaussian vectors whose means belong to a known spectral library. This paper proposes to estimate the number of endmembers involved in the mixture, as well as the mixture coefficients (referred to as abundances) using a trans-dimensional algorithm. Appropriate prior distributions are assigned to the abundance vector (to satisfy constraints inherent to hyperspectral imagery), the noise variance and the number of components involved in the mixture model. The computational complexity of the resulting posterior distribution is alleviated by constructing an hybrid Gibbs algorithm which generates samples distributed according to this posterior distribution. As the number of endmembers is unknown, the sampler has to jump between spaces of different dimensions. This is achieved by a reversible jump Markov chain Monte Carlo method that allows one to handle the model order selection problem. The performance of the proposed methodology is evaluated thanks to simulations conducted on synthetic data.

关键词： Bayesian inference Monte Carlo methods reversible jump spectral unmixing hyperspectral images normal compositional model

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Formation constrained coordinated motion control methods for the crustal movement simulation system

Formation constrained coordinated motion control methods for...

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2010 International conference on Intelligent Control and Information processing, ICICIP 2010

作者： Fan, Changchun Yang, Guodong Li, En Liang, Zize Institute of Automation Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781424470488

Crustal movement modeling and analysis is one of the major tasks in the earth system science. In this paper, a distributed system for simulating the crustal movement was developed. The crustal movement simulation system (CMSS) is designed based on multi-agent system (MAS). Such a simulation system is composed by a number of independently controlled parallel robots, and each robot represents a crustal plate. To achieve smooth and accurate motion without slipping and sliding, realtime coordinate control of the multi-agent system is essential. Based on the MAS, a general approach for formation constrained coordinated motion control scheme is proposed. The feasibility and effectiveness of the network-based MAS control method is verified through simulation. © 2010 IEEE.

关键词： Multi agent systems

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