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MIPPR 2009 - Remote Sensing and GIS Data processing and Other Applications: 6th International Symposium on Multispectral image processing and Pattern Recognition

作者： Wang, Zuxi Zhao, Xiangyuan Wang, Wenzong Hu, Hanping Li, Li Institute of Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology China Key Laboratory of Image Processing and Intelligent Control Ministry of Education Wuhan 430074 China

ISBN: (纸本)9780819478092

In this paper, a semi-fragile watermark solution based on quantization index modulation in the wavelet region was proposed. The algorithm employs a compressed halftoned binary image as watermark and embeds it in the wavelet domain through quantization index modulation, which can not only identify the authenticity of the content of digital image, but also recover the tampered image approximately. Because the watermark is a low-resolution original image, which carries the original image information, so the original image is not required when authenticating, and the tampered region can be recovered according to the watermark. The method can tolerate a certain degree of compression distortion or noise. Beside, a secret key is used to select the embedded watermark bits and their embedded positions to increase the security of watermarking. Experimental results show this semi-fragile watermarking algorithm is effective and practical for content authentication. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Binary images

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Integrated bus transit scheduling for the Beijing bus group based on a unified mode of operation

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INTERNATIONAL TRANSACTIONS IN OPERATIONAL RESEARCH 2009年第2期16卷 227-242页

作者： Shen, Yindong Xia, Jiahong Huazhong Univ Sci & Technol Key Lab Image Proc & Intelligent Control Wuhan 430074 Peoples R China Wuhan Our Response Infotech Co Ltd Wuhan 430074 Peoples R China

This paper presents an applied study of scheduling buses and drivers for the Beijing Bus Group (BJBUS), the largest bus company in China. This is pioneering research in China for bus transit scheduling using computers based on a unified mode of operation. It is anticipated that the research fruits and experiences obtained would be of benefit to other bus operators in China. The bus transit scheduling problem in BJBUS is first presented in the paper. The particular characteristics are pointed out, which are different from those in developed countries, while many are common in China. After a brief review and analysis of the appropriateness of some currently successful approaches, the paper focuses on reporting the solution ideas and methods for BJBUS, especially those developed to solve the specific problems of BJBUS, such as scheduling buses with built-in meal periods, multi-type bus scheduling, restricting drivers to one or two particular buses, etc. Finally, the implementation and computational results are reported before the concluding remarks.

关键词： public transport scheduling Beijing Bus Group unified operation mode bus scheduling driver scheduling

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Primary Research on Urban Mass Panic Based on Computational Methods for Experiments

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6th International Symposium on Neural Networks

作者： Chen, Xi Fei, Qi Li, Wei Huazhong Univ Sci & Technol Inst Syst Engn Key Lab Minist Educ Image Proc & Intelligent Control Wuhan 430074 Peoples R China

ISBN: (纸本)9783642015120

Base on the theory of computational methods of experiments and agent modeling technology, combining with sociology and psychology, the paper presents method of computational experiments for research of Urban Mass Panic (UMP). The method proposed a panic-information transmitting, artificial system for computational experiments with agent modeling technology. The system planed two kinds of agents: social individual agents and panic alarming agents. Social individual agents are designed to simulate persons living common human society. These agents which contain the ability of panic information recognition, reflection and making different decision are simulated with some nonlinear methods, Such as fuzzy neural network. Panic alarming agents are designed to simulate circumstance which engenders panic information or panic phenomenon. These agents collect information about panic and release information to social individual agents by different transmitting methods we call image. The paper also discusses how to carry through measurement to check the level of UMP by the information entropy theory dynamically.

关键词： Computational Methods for Experiments (CME) Urban Mass Panic (UMP)

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Constrained Trajectory Optimization Using Migrant Particle Swarm Optimization Algorithm

Constrained Trajectory Optimization Using Migrant Particle S...

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4th International Conference on Bio-Inspired Computing

作者： Xie, Fuqiang Wang, Yongji Zheng, Zongzhun Zhang, Da Huazhong Univ Sci & Technol Dept Control Sci & Engn Key Lab Minist Educ Image Proc & Intelligent Cont Wuhan 430074 Peoples R China

ISBN: (纸本)9781424438655

A novel PSO algorithm, the Migrant Particle Swarm Optimization (Migrant PSO), is presented to solve the trajectory optimization problem in the presence of constraints such as dynamic pressure and overload. Imitating the behaviour of a flock of migrant birds, the Migrant PSO algorithm employs stochastic search method and adaptive linear search method respectively for PSO search spaces including both continuous space and discrete space. In the example of the minimum peak heat rate reentry trajectory optimization for X-33 vehicle model with free terminal time, some key problems such as parameterized method are argued in detail. The simulation results indicate that the Migrant PSO algorithm proves to be able to generate a complete and optimal 3DOF reentry trajectory rapidly.

关键词： Trajectories

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Perceptual ringing metric to evaluate the quality of images restored using blind deconvolution algorithms

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OPTICAL ENGINEERING 2009年第3期48卷 037004-1-037004-9页

作者： Zuo, Bo-Xin Ming, De-Lie Tian, Jin-Wen Huazhong Univ Sci & Technol Inst Pattern Recognit & Artificial Intelligence State Key Lab Image Proc & Intelligent Control Wuhan 430074 Hubei Province Peoples R China Huazhong Univ Sci & Technol Inst Recognit & Artificial Intelligence State Educ Commiss Lab Image Proc & Intelligence Wuhan 430074 Hubei Province Peoples R China

Linear space-invariant image restoration algorithms often introduce ringing effects near sharp intensity transitions. A ringing metric to evaluate the quality of images restored using iterative deconvolution algorithms is presented. According to the types of ringing artifacts, two ringing metrics are used to assess the restored images based on the analysis of ringing artifacts. An overall ringing metric is presented based on the two ringing metrics. The experimental results validate that the proposed method performs well over a wide range of restoration image ringing level assessments. Consequently, the proposed model has a good agreement with the ratings from an observer in subjective experiments. (C) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3095766]

关键词： image quality assessment metric ringing restoration cooccurrence matrix

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A New Quantization Improvement of SPIHT for Wavelet image Coding

A New Quantization Improvement of SPIHT for Wavelet Image Co...

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6th International Symposium on Neural Networks

作者： Wang, Wentao Wang, Guoyou Zhang, Tianxu Huazhong Univ Sci & Technol Key Lab Educ Minist Image Proc & Intelligent Control Inst Pattern Recognit & Artificial Intelligence Wuhan 430074 Peoples R China

ISBN: (纸本)9783642015090

The SPIHT (set partitioning in hierarchical trees) algorithm has attracted great attention in recent years as a technique for image coding. Not only does it give good objective and subjective performance, it is also simple and efficient. In this paper, we investigate the problem Of how to quantize the wavelet coefficients in the lowest frequency subband with multi-scalar method. A novel wavelet image coding algorithm using multi-scalar quantization based oil SPIHT is proposed. First, in the higher bit plane, this algorithm only quantizes the wavelet coefficients in the lowest frequency subband. Then it quantizs other ones by uniform scalar. Experiment results have shown the proposed scheme improves the performance of wavelet image coders. In particular. it will get better coding gain in the low bit rates image coding.

关键词： Wavelet transform multi-scalar quantization SPIHT bit plane

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A point-pattern matching method based on maximal subset of one-to-one mapping

A point-pattern matching method based on maximal subset of o...

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MIPPR 2009 - Pattern Recognition and Computer Vision: 6th International Symposium on Multispectral image processing and Pattern Recognition

作者： Hu, Jing Zhang, Tian-Xu Institute for Pattern Recognition and AI Hua Zhong University of Science and Technology Wuhan 430074 China Key Lab. of Education Ministry for Image Processing and Intelligent Control Hua Zhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819478078

This paper presents a new affine registration approach for planar point pattern matching. A process of parameter space clustering is implemented to confirm a one-to-one mapping between the maximal subsets of feature point sets in images. For a best performance, a coarse parameter space and a fine parameter space are used for vectors comparison. Experiments show that the method can produce positive results from a small number of feature points and intensive noise. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Affine transforms

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Age-dependent changes in skin surface assessed by a novel two-dimensional image analysis

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SKIN RESEARCH AND TECHNOLOGY 2009年第4期15卷 399-406页

作者： Zou, Yaobin Song, Enmin Jin, Renchao Huazhong Univ Sci & Technol Coll Comp Sci & Technol Wuhan 430074 Peoples R China Minist Educ Grp Biomed Image Proc & Analyzing Key Lab Image Proc & Intelligent Control Wuhan Peoples R China Jiangxi Univ Tradit Chinese Med Coll Comp Sci & Technol Nanchang Peoples R China

Background/purpose Skin microrelief has been studied using various methods and devices. However, the long duration of time needed to process one sample or the expensive equipment hampered the use of those systems for routine diagnosis. Today, the emergence of new software and hardware technologies may allow this issue to be resolved. Methods To characterize objectively the skin surface, we introduced a new parameter SPm, namely, the area mean of superficial skin texture block formed by primary and secondary lines crossing each other. Based on the skin detector produced by the Boseview Technology Company, we developed a software for acquiring automatically skin images and calculating SPm. The relationship between SPm and age was studied on the dorsal and ventral midway of the forearm (sun-exposed and sun-protected areas) of 94 healthy volunteers without a history of smoking. Results The skin surface topography can be conveniently quantified with the new parameter SPm. The value of SPm of both sites increases with age, independent of sex, with the site more exposed to light being more affected. Conclusion With the software developed, the details of the skin surface can be observed. SPm appears to be a new valid parameter for characterizing the property of the skin surface. Our method, alone or in combination with other technologies of skin topography analysis may be applied in routine diagnosis for a quantified evaluation of skin aging.

关键词： skin surface topography skin image processing skin aging skin routine diagnosis

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An automatic seed selection in infrared image based on mountain clustering

An automatic seed selection in infrared image based on mount...

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MIPPR 2009 - Multispectral image Acquisition and processing: 6th International Symposium on Multispectral image processing and Pattern Recognition

作者： Li, Tao Liu, Jian Lei, Kaibin College of Computer Science and Technology Southwest University for Nationalities Chengdu 610041 China Key Laboratory of Education Ministry for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819478054

Because of noise and clutter, the infrared target detection even becomes more difficult. In this paper, we present an automatic seed selection method based on an improved mountain cluster algorithm to be employed in infrared target segmentation. The original image was projected to x and y coordination firstly. Then the modified mountain clustering algorithm is employed on the projection data to obtain the cluster center which is applied as the seed point for region growing. This approach has been performed on a field infrared image. The experimental results show that the proposed method can provide satisfactory segmentation result. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Clustering algorithms

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Robust stability conditions for remote SISO DMC controller in networked control systems

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JOURNAL OF PROCESS control 2009年第5期19卷 743-750页

作者： Huang, Jian Wang, Yongji Yang, Shuang-Hua Xu, Qi Huazhong Univ Sci & Technol Dept Control Sci & Engn Wuhan 430074 Peoples R China Educ Minist China Key Lab Image Proc & Intelligent Control Wuhan Peoples R China Univ Loughborough Dept Comp Sci Loughborough LE11 3TU Leics England

A two level hierarchy is employed in the design of networked control systems (NCSs) with bounded random transmission delay. At the lower level a local controller is designed to stabilize the plant. At the higher level a remote controller with the dynamic matrix control (DMC) algorithm is implemented to regulate the desirable set-point for the local controller. The conventional DMC algorithm is not applicable due to the unknown transmission delay in NCSs. To meet the requirements of a networked environment, a new remote DMC controller is proposed in this study. Two methods, maximum delayed output feedback and multi-rate sampling, are used to cope with the delayed feedback sensory data. Under the assumption that the closed-loop local system is described by one FIR model of an FIR model family, the robust stability problem of the remote DMC controller is investigated. Applying jury's dominant coefficient lemma and some stability results of switching discrete-time systems with multiple delays;several stability criteria are obtained in the form of simple inequalities. Finally, some numerical simulations are given to demonstrate the theoretical results. (C) 2008 Elsevier Ltd. All rights reserved.

关键词： Model predictive control (MPC) Dynamic matrix control (DMC) Stability Delay Multi-rate sampling Networked control systems (NCSs)

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