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Improved blind watermarking of 3D objects based on partition

Improved blind watermarking of 3D objects based on partition

引用

5th International Conference on Natural Computation, ICNC 2009

作者： Yao, Zhiqiang Chen, Liping Pan, Rijing Yang, Shanchao Curran, Kevin Faculty of Software Fujian Normal University China Key Lab. of Network Security and Cryptology Fujian Normal University China School of Computing and Intelligent Systems University of Ulster United Kingdom

ISBN: (纸本)9780769537368

With the development of architecture design, virtual reality, entertainment, mechanical engineering and cultural heritage, digital watermarking has played an important role in copyright protection of 3-D objects. However, due to the problems such as computational complexity and capturing local geometrical feature of 3D mesh, watermarking of 3D objects has not reached the same level of maturity as that of still images and video. In order to alleviate them, mesh partition is applied in the algorithm. This paper presents a novel mesh partition approach which can predict the partition boundary ofstego-mesh with some additional information instead of the presence of the cover-mesh. The canonical positions of meshes are determined by employing the face normal principal component analysis. So the additional information is picked up scatteredly from the elevation of the cover-mesh in canonical coordinate systems and used to match the elevation of the stego-mesh. After matching the elevation, the deflected degree of coordinate system is estimated to realign the stego-mesh approximately and plot out the partition boundary. Finally, an improved watermarking is proposed and a group of experiment results are presented to verify the stability of the proposed partition scheme against some attach imposed on meshes. © 2009 IEEE.

关键词： Virtual reality

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Noise removal using edge-preserving fourth-order partial differential equations

Noise removal using edge-preserving fourth-order partial dif...

引用

2009 2nd International Congress on Image and Signal Processing, CISP'09

作者： Yuanquan, Wang Yunting, Zhang Tielian, Yu Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Dept. of Radiology General Hospital of Tianjin Medical University Tianjin 300052 China

ISBN: (纸本)9781424441310

Over the last decade, partial differential equations (PDEs) have been justified as effective tools for image smoothing;they are able to achieve a good trade-off between noise removal and edge-preserving. Among various methods, the second-order PDEs provide better results than other conventional methods, but staircasing effect can always be observed;the fourth-order PDEs can alleviate this staircasing effect, but its edge-preserving ability is not satisfactory. In this paper, a class of novel fourth-order PDEs are proposed, which seek to approximate the noisy image with an almost harmonic image and simultaneously preserve the edges. The properties of the proposed method are demonstrated with numerical examples and compared with that of a popular one. ©2009 IEEE.

关键词： Partial differential equations

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An efficient image processing method based on web services for mobile devices

An efficient image processing method based on web services f...

引用

2009 2nd International Congress on Image and Signal Processing, CISP'09

作者： Yi, Liang Yingyuan, Xiao Jing, Huang Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin China

ISBN: (纸本)9781424441310

The resource limitation of mobile devices causes the problem that the existing image processing software based on the centralized computing mode had difficulty running in mobile devices. A solution is given in the paper by adopting web service-based image processing method. For one thing, image processing tasks were distributed to service providers' service registry and service requesters. For another, what the service providers should do was only to invocate the specific image processing services provided by service providers. Consequently, web service-based solution reduces the resource consumption of mobile devices by redistributing image processing tasks. Compared with traditional methods of image processing, Web service-based image processing method has the advantages of loose coupling and component oriented and can take full advantage of the computing resources in heterogeneous network. Thus web service-based image processing method can effectively solve the resource bottle-neck that traditional image processing software had. ©2009 IEEE.

关键词： Web services

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A fast thinning algorithm for fingerprint image

A fast thinning algorithm for fingerprint image

引用

1st International Conference on Information Science and engineering, ICISE2009

作者： Xiang, Ming Wu, Xiaopei Hua, Quanping Key Lab. of Intelligent Computing and Signal Processing Anhui University Hefei230039 China Department of Information Engineering Zhejiang Textile and Fashion College Ningbo315211 China

ISBN: (纸本)9780769538877

Thinning algorithms can be classified into two general types: serial and parallel algorithms. Several algorithms have been proposed, but they have limitations. A new thinning algorithm based on the centroid of the block is presented. The new algorithm checks the 9*9 local neighborhoods around the pixel to find out the centroid pixel of the block, and other pixels are removed. The process is performed iteratively until less than ten pixels are deleted in one loop. To ensure the ridge is one pixel wide, a post-processing loop is designed and the pixels are deleted from the image if they satisfy some conditions. Experimental results are used to compare this new algorithm to other algorithms and their relative performances are assessed. The new algorithm is fast than other algorithms and the ridges are one pixel wide after thinned. ©2009 IEEE.

关键词： Pixels

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Research on unified network access control architecture

Research on unified network access control architecture

引用

IEEE 9th International Conference on Computer and Information Technology, CIT 2009

作者： Liu, Yabin Zhang, Huanguo Zhang, Liqiang Zhao, Bo Computer School Wuhan University Wuhan Hubei China Key Lab. of Aerospace Information Security and Trusted Computing MOE Wuhan Hubei China State Key Lab. of Software Engineering Wuhan University Wuhan Hubei China

ISBN: (纸本)9780769538365

Border access control, network security mechanism and system access control are three separately access control procedures when user accessing the resource on network. Network access control mechanism, which adding the authentication of endpoint's platform besides the classical identity-based border access control, enhances the level of protection for network resources to some extent. In the existing network access control mechanisms, TNC has been trying to integrate the network access control mechanism and network security mechanism to add dynamic characteristics, but still can not cover the whole resource access control process. Once a user passes the authentication, he can still make damage to the system. This paper proposes a Unified Network Access Control (UNAC) architecture which effectively integrates the network access control, network security mechanism and system access control through the trust degree, and it can achieve dynamically user control during the resource accessing period. © 2009 IEEE.

关键词： Authentication

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Knowledge discovery approach based on closeness relationship of FC

Knowledge discovery approach based on closeness relationship...

引用

6th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2009

作者： Zhang, Degan Li, Miao Zhang, Xiaoli Wang, Jinhui Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9780769537351

A fuzzy clustering is one of important and valid methods to knowledge discovery. One of problems in fuzzy clustering is to determine a certain fuzzy sample classification in given limited sample space. Another is its validity, that is to say, if the sample is resemble in sample space, its fuzzy type will be resemble too. In our research, firstly, using triangle arithmetic operator and triangle transference, we extend fuzzy equivalence relationship to fuzzy closeness relationship, and cluster. Secondly, importing fuzzy coverage based on fuzzy closeness relationship, we judge resemble type of resemble sample. Thirdly, we introduce the clustering method based on fuzzy closeness relationship and fuzzy coverage. The method can overcome information more loss in fuzzy equivalence. Finally, evaluating its validity, we test its feasibility. The method above is applied to knowledge discovery for electronic commerce on Internet, we have got good result. © 2009 IEEE.

关键词： Fuzzy clustering

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An efficient web service composition approach based on improved particle swarm optimization model

An efficient web service composition approach based on impro...

引用

International Conference on Management and Service Science, MASS 2009

作者： Yi, Liang Yingyuan, Xiao Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9781424446391

Along with the rapid growth of the number of the availab.e web services over the internet, the quality of services (Qos) becomes an imperative concern for service consumers and providers. How to differentiate their quality based on Qos criteria at web service level is a challenging issue. Considering that evolutionary algorithm has powerful ability of searching information, a new web service composition model under improved particle swarm optimization (IPSO) algorithm is presented in this paper. According to the non-functional attributes Qos of services, the model can select web services with optimal Qos and compose them into value-added web services. Furthermore, IPSO model not only can find the service with optimal Qos immediately but also can overcome the bottleneck of the standard PSO model. It can balance the exploitation and exploration and avoid premature convergence to some extent. As a result, web services can be invocated dynamically and be composed automatically and efficiently. The preliminary experimental results indicate that the web service composition approach based on IPSO model is applicable and feasible to the optimization of general service compositions. ©2009 IEEE.

关键词： Quality of service

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A hybrid efficient short-term traffic flow forecast technology

A hybrid efficient short-term traffic flow forecast technolo...

引用

6th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2009

作者： Lin, Xin Wang, Xiaoye Xiao, Yingyuan Zhang, Degan Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9780769537351

This paper presents a hybrid short-term traffic flow forecast technology. For the uncertainty, the short-term traffic flow forecast is complicated, and the accuracy is not high. This strategy combines the RBF neural network and ant colony clustering algorithm to forecast the traffic flow. It used ant colony clustering algorithm to get the centers of hidden layer neurons. To find the best clustering result, local search is used in ant colony algorithm. The model has strong local generalization abilities and high accuracy. The simulation experiment results illuminate that the application is fairly effective. © 2009 IEEE.

关键词： Forecasting

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Research on multi-dimensional association rules mining in distributed environments based on advanced SQL query

Research on multi-dimensional association rules mining in di...

引用

6th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2009

作者： Zhang, Lei Qiao, Mei Zhang, Degan Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9780769537351

This paper proposes the MDMA (Multi-dimensional Distributed Mining Association rules) algorithm based on advanced SQL query. The algorithm works on star-style structure networks. It uses CUBE operator in new standard SQL and combines with SQL powerful query function. So there is no need for the proposed algorithm to conduct a great deal of iterations to generate frequent itemsets in the process of mining association rules. Therefore, no matter what the number of the site in the distributed environments and the scale of the local database in the local site is, the algorithm always needs only two times of scanning the database and only three times of network communications to generate all the global frequent itemsets. Consequently, this algorithm has the merits of light network traffic, low time cost, better scalab.lity and more simplicity. © 2009 IEEE.

关键词： Association rules

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A novel two-step-deformation active contour with application to facial features extraction

A novel two-step-deformation active contour with application...

引用

2009 2nd International Congress on Image and Signal Processing, CISP'09

作者： Hua, Zhang Yuanquan, Wang Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9781424441310

In allusion to the boundary leaking problem of traditional active contours when used to extract facial features, two kinds of local information are introduced to enhance the weak boundary, then to build new external force for active contours. The prior knowledge of the local shape of the facial features is incorporated into the evolution of active contour. The snake contour in each evolution step just serves as prediction, and then is ruled by the prior local shape;this way, the snake contour deforms via prediction-correction two steps. This two-step-deformation (TSD) snake can utilize the a priori shape of objects effectively. The proposed strategies are evaluated on several images and the experimental results validate the high performance of this TSD snake for facial features segmentation. ©2009 IEEE.

关键词： Deformation

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