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24th Annual ACM Symposium on Applied Computing, SAC 2009

作者： Liu, Hong Dai, Siguang Song, Enmin Yang, Cihui Hung, Chih-Cheng School of Computer Science Huazhong University of Science and Technology Wuhan China School of Computing and Software Engineering Southern Polytechnic State University Marietta GA 30060 United States

ISBN: (纸本)9781605581668

This paper proposes a new K-View algorithm for texture image classification using rotation-invariant features. These features are statistically derived from characteristic view sets for each texture. Unlike the existing K-View algorithm, all the views used are transformed into rotation-invariant features and the K views are selected randomly. In contrast, the existing K-View algorithm uses the K-means algorithm for choosing the K views. In this new algorithm the decision of determining a pixel to which texture class it belong to, is made by considering all the views which consist of the pixel being classified. In order to preserve the primitive information of a texture class as much as possible, the proposed algorithm randomly selects k views of the view set from each sample sub-image as the characteristic view set. Experimental results show that the proposed algorithm is more robust and accurate compared with the results of the existing K-View algorithm. Copyright 2009 ACM.

关键词： Pixels

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A prototype of H.264-based remote video surveillance system

A prototype of H.264-based remote video surveillance system

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2nd International Conference on Intelligent Networks and Intelligent Systems, ICINIS 2009

作者： Yuan, Chunmiao Jin, Zhigang Yang, Qingyong School of Computer Science and Tech. Tianjian University Tianjin China Tianjin Polytechnic University Tianjin China School of Electroic and Info. Engineering Tianjian University Tianjin China Tiandy Digital Tech. Co. Ltd. Tianjin China

ISBN: (纸本)9780769538525

The paper proposes a prototype of H.264-based remote network video surveillance system. H.264 is adopted as encoding/decoding technology which has the higher compression rate than other technologies such as MPEG serials and therefore decreases the requirements of network bandwidth in a great extent. The architecture of system and design of hardware are described and the QoS mechanisms of the system also are given. The running data show the system saves the network bandwidth effectively and input the smooth data flow into the network. © 2009 IEEE.

关键词： Bandwidth

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A adaptive frame rate QoS control in wireless video surveillance system

A adaptive frame rate QoS control in wireless video surveill...

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5th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2009

作者： Chunmiao, Yuan Zhigang, Jin Qingyong, Yang School of Computer Science and Tech. Tianjian University Tianjin China Tianjin Polytechnic University Tianjin China School of Electronic and Info. Engineering Tianjian University Tianjin China Tiandy Digital Tech. Co. Ltd. Tianjin China

ISBN: (纸本)9781424436934

A novel prototype QoS control scheme AFRS for wireless video surveillance system is proposed. AFRS means adaptive frame rate scheme which is terminal-centric and will dynamically adjust the frame rate according to the real time wireless network bandwidth. Experiments show when the network bandwidth changes, AFRS can efficiently decline the network flow, decrease the probability of packet loss rate and assure the quality of video. The scheme has been applied into reality and worked well. ©2009 IEEE.

关键词： Quality of service

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Applying LBP operator to Gabor response for palmprint identification

Applying LBP operator to Gabor response for palmprint identi...

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2009 International Conference on Information engineering and computer science, ICIECS 2009

作者： Shen, Linlin Ji, Zhen Zhang, Lei Guo, Zhenhua School of Computer Science and Software Engineering Shenzhen University Shenzhen China Biometrics Research Centre Department of Computing Hongkong Polytechnic University HongKong Hong Kong

ISBN: (纸本)9781424449941

We proposed in this paper an accurate and efficient approach for palmprint identification. In this method, a Gabor wavelet is first convolved with the palmprint image to produce a response image, where LBP is then applied to code the relation among the magnitude of wavelet response at central pixel with that of its neighbors. The method is fully tested using the public PolyU palmprint database. In the experiment, 3864 test images are identified by the proposed method against the 1158 templates. While palm code achieves only about 89% accuracy, over 96% accuracy is achieved by the proposed G-LBP approach. Our approach could identify a palmprint image within 200 ms. ©2009 IEEE.

关键词： Local binary pattern

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Research on sharing platform of urban spatial information service

Research on sharing platform of urban spatial information se...

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International Symposium on Spatial Analysis, Spatial-Temporal Data Modeling, and Data Mining

作者： Wang, Gang Hu, Ruipeng School of Resource and Environmental Science Wuhan University China Computer and Information Engineering Department Wuhan Polytechnic University China Tianjin Institute of Surveying and Mapping China

ISBN: (纸本)9780819478030

With the development of GIS, intelligent management and networking, sharing the urban spatial information is becoming more and more important. This paper researches four important aspects of building the sharing platform of urban spatial information service, such as data organization, platform structure, application modes and key technologies used. Spatial data, as the dissemination vector of the spatial information, have a very important position in sharing the urban information services. In this paper, two main spatial data models are used to organize the required data. One is the multi-scale Pyramid model with sole element to deal with the vector data, the other is the tile Pyramid model to deal with the raster data. Taking into account the characteristics of the sharing platform such as multi-user, multi-demand, multi-purpose, and multi-functional, two modes namely Browser/Server (B/S) and Client/Server (C/S) are used to construct the entire sharing platform structure. The ultimate goal of building this sharing platform is to apply it in the urban construction to satisfy peoples' needs. So we must to select the suitable application mode. Finally, this paper introduces some key technologies used and the realized sharing platform of tianjin urban spatial information service. © 2009 SPIE.

关键词： Information services

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Generating test case from functional requirement of Web applications

Generating test case from functional requirement of Web appl...

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2nd International Symposium on Electronic Commerce and Security, ISECS 2009

作者： Zhu, Bin Miao, Huaikou Zeng, Hongwei Chen, Shengbo School of Computer Engineering and Science Shanghai University Shanghai 200072 China School of Computer and Information Shanghai Second Polytechnic University Shanghai 201209 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai China

ISBN: (纸本)9780769536439

E-commerce has been developing rapidly around the world. We run Web application to support e-commerce. Quality of Web applications influences the functionalities and security of e-commerce. Modeling and testing are important to Quality of Web applications. Many researchers are still to find effective ways to model and test Web applications. Formal methods can improve the quality of Web applications. This paper suggests utilizing a formal language (object-z to) describe functional requirement of Web applications. An approach to generating test sequence is introduced in this paper. We analyze formal specification to find out atomic operations and then identify the environment precondition of the operation (EPRE) for each atomic operation. We use EPREs to build an environment Transition Graph (ETG). The steps of transforming an ETG into environment transition sequences are also addressed. Two test adequacy criteria are defined as a guideline for the selection of the test sequences. © 2009 IEEE.

关键词： Formal languages

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A Fast Algorithm for Improving the Visual Distance in Fog

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Semiconductor Photonics and Technology 2009年第4期15卷 241-246页

作者： YANG Wei XIAO Zhi-tao YU Jian YAN Zhi-jie School of Information and Communication Engineering Tianjin Polytechnic University Tianjin 300160 CHN School of Computer Science and Technology Tianjin University Tianjin 300072 CHN

Images captured outdoor usually degenerate because of the bad weather conditions,among which fog,one of the widespread phenomena,affects the video quality *** physical features of fog make the video blurred and the visible distance shortened,seriously impairing the reliability of the video *** order to satisfy the requirement of image processing in real-time,the normal distribution curve fitting technology is used to fit the histogram of the sky part and the region growing method is used to segment the region of *** for the non-sky part,a method of self-adaptive interpolation to equalize the histogram is adopted to enhance the contrast of the *** results show that the method works well and will not cause block effect.

关键词： fog image interpolation region growing histogram equalization fast algorithm normaldistribution

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A directed signature scheme and its application to group key initial distribution 09

A directed signature scheme and its application to group key...

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2nd International Conference on Interaction sciences: Information Technology, Culture and Human, ICIS 2009

作者： Wei, Qian He, Jingsha Shao, Huiying College of Computer Science and Technology Beijing University of Technology Beijing China School of Software Engineering Beijing University of Technology Beijing China Information Engineering Department Xingtai Polytechnic College Xingtai China

ISBN: (纸本)9781605587103

Each member entering into a confidential group is unwilling to make the private information, i.e., which group he wants to join, who is the group manager and who issues the admission token, available to the general public and hence to any adversary. The group key initial distribution based on basic signature can not efficiently protect the privacy of the entering member since the basic signature can be verified by anyone using the corresponding public key. In this paper, we propose a directed signature scheme based on the elliptic curve ElGamal cryptosystems and apply it to the group key initial distribution for a confidential group communication. Through comparing to the elliptic curve ElGamal digital signature scheme in terms of computational cost using statistical hypothesis t-test two samples for means and Wilcoxon rank sum test, the results of the experiment show that our directed signature scheme is not significantly different from the digital signature scheme in statistics so that the group key initial distribution based on our directed signature scheme not only efficiently protects the privacy of the entering member but also saves the computation resources. Copyright © 2009 ACM.

关键词： Authentication

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Location security in geographic ad hoc routing for VANETs

Location security in geographic ad hoc routing for VANETs

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2009 International Conference on Ultra Modern Telecommunications and Workshops

作者： Ren, Ziwei Li, Wenfan Yang, Qing Wu, Shaoen Chen, Lei Computer Science and Software Engineering Southern Polytechnic State University Marietta GA 30060 United States Computer Science and Software Engineering Auburn University Auburn AL 36849 United States School of Computing University of Southern Mississippi Hattiesburg MS 39406 United States Department of Computer Science Sam Houston State University Huntsville TX 77341 United States

ISBN: (纸本)9781424439416

Vehicle-to-vehicle communication among vehicular ad hoc networks (VANETs) plays an important role in providing a high level of safety and convenience to drivers. Geographic routing protocol has been identified to be suitable for VANETs because of the special nature of such networks, e.g., frequently changed network topology and high dynamic mobility. There is considerable functional research about geographic routing, but the node location security issues have not been vastly concentrated on so far. While selecting every hop, the performance and security can be impacted severely by false position because of the position information importance for geographic routing. Making use of directional antennas, we propose a novel detection mechanism capable of recognizing nodes faking about their positions in beacon message. By checking through which directional antenna beacon messages are received, ones' neighborhood can be easily divided into two groups. In addition, combined with the three malicious node detection rules, nodes can efficiently detect malicious nodes around them after exchanging neighbors grouping information with each others. As the evaluation based on simulations shows, our position verification system can detect malicious nodes successfully and can prevent attacks on geographic routing by false position. ©2009 IEEE.

关键词： Vehicular ad hoc networks

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Scheduling for Uncertain Data Broadcast in Mobile Networks

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Journal of Southwest Jiaotong university(English Edition) 2009年第3期17卷 192-198页

作者：许华杰李国徽胡小明余艳玮 School of Computer and Information Shanghai Second Polytechnic University School of Computer Science and Technology Huazhong University of Science and Technology School of Software Engineering University of Science and Technology of China

With the increasing popularity of wireless sensor network and GPS （ global positioning system）, uncertain data as a new type of data brings a new challenge for the traditional data processing methods. Data broadcast is an effective means for data dissemination in mobile networks. In this paper, the def＇mition of the mean uncertainty ratio of data is presented and a broadcasting scheme is proposed for uncertain data dissemination. Simulation results show that the scheme can reduce the uncertainty of the broadcasted uncertain data effectively at the cost of a minor increase in data access time, in the case of no transmission error and presence of transmission errors. As a result, lower uncertainty of data benefits the qualifies of the query results based on the data.

关键词： Mobile networks Uncertain data Broadcast Scheduling

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