检索结果-内蒙古大学图书馆

Rao-Blackwellised extended Kalman filter with correlated noises

Journal of Information and Computational Science 2013年第10期10卷 3117-3124页

作者： Hu, Zhentao Fu, Chunling Institute of Image Processing and Pattern Recognition Henan University Kaifeng 475004 China Basic Experiment Teaching Center Henan University Kaifeng 475004 China

Aiming at the adverse influence of correlation between measurement noise and process noise for filtering precision in nonlinear system estimation, Firstly, Rao-Blackwellised modeling technique is introduced to disassemble nonlinear and linear component of system state, and then Kalman filter and extended Kalman filter are used to realize estimation for them, respectively. On that basis, we construct the Rao-Blackwellised extended Kalman filter. Secondly, through rearrange the state transition function and make it independent between process noise and measurement noise, we give the decoupling method of correlated noises. Finally, combined with the Rao-Blackwellised extended Kalman filter and the decoupling method of correlated noises, a novel Rao-Blackwellised extended Kalman filter with correlated noises is proposed in this paper. The new method not only improves the filtering precision, but also decreases the calculated amount relative to standard extended Kalman filter, The theoretical analysis and experimental results show the efficiency of the proposed algorithm. Copyright © 2013 Binary Information Press.

关键词： Extended Kalman filters

来源：评论

学校读者我要写书评

暂无评论

Placement and selection algorithm of reference nodes in WSN localization

Placement and selection algorithm of reference nodes in WSN ...

引用

6th China Conference of Wireless Sensor Networks, CWSN 2012

作者： Min, Lin Li, Hui Guo, Zhengwei Network Information Center Office Henan University Kaifeng Henan 475001 China Henan University Minsheng College Kaifeng Henan 475004 China School of Computer and Information Engineering Institute of Image Processing and Pattern Recognition Henan University Kaifeng Henan 475001 China

ISBN: (纸本)9783642362514

Currently, few studies of wireless sensor network node localization algorithm were focused on the reference nodes, but how to choose and place reference nodes has a great influence on the positioning accuracy. In order to quantitatively study this issue, we proved a theorem, which describes the relationship between the placement of reference nodes and whether the node can be located, then the reference nodes placement method was designed. Finally, a reference nodes selection algorithm was proposed based on the condition number of linear equations, so as to improve the accuracy of range-based localization algorithm. © 2013 Springer-Verlag.

关键词： Number theory

来源：评论

学校读者我要写书评

暂无评论

Improved DV-hop localization algorithm based on RSSI value and hop correction

Improved DV-hop localization algorithm based on RSSI value a...

引用

6th China Conference of Wireless Sensor Networks, CWSN 2012

作者： Guo, Zhengwei Min, Lin Li, Hui Wu, Wenjian School of Computer and Information Engineering Institute of Image Processing and Pattern Recognition Henan University Kaifeng Henan 475001 China Network Information Center Office Henan University Kaifeng Henan 475001 China Henan University Minsheng College Kaifeng Henan 475004 China

ISBN: (纸本)9783642362514

On the basis of the analysis of the relation between network's topologyand localization precisionan improved DV-Hop algorithm based on hop correction is put forward. Firstly, RSSI value is used to correct the distance between unknown node and reference nodes in the range of single hop;secondly, a certain amount of correction value is added to the original hop between unknown node and reference nodes to further reduce the distance error between them. Simulation result shows that improved algorithm improves the localization precision. © 2013 Springer-Verlag.

关键词： correction DV-Hop WSN

来源：评论

学校读者我要写书评

暂无评论

GEODESIC SALIENCY PROPAGATION FOR image SALIENT REGION DETECTION

GEODESIC SALIENCY PROPAGATION FOR IMAGE SALIENT REGION DETEC...

引用

IEEE International Conference on image processing

作者： Keren Fu Chen Gong Irene Y.H. Gu Jie Yang Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University China Department of Signals and Systems Chalmers University of Technology Gothenburg Sweden

ISBN: (纸本)9781479923427

This paper proposes a novel geodesic saliency propagation method where detected salient objects may be isolated from both the background and other clutter by adding global considerations in the detection process. The method transmits saliency energy from a coarse saliency map to all image parts rather than from image boundaries in conventional cases. The coarse saliency map is computed using the combination of global contrast and Harris convex hull. Superpixels from pre-segmented image are used as pre-processing to further enhance the efficiency. The proposed propagation is geodesic distance assisted and retains the local connectivity of objects. It is capable of rendering a uniform saliency map while suppressing the background, leading to salient objects being popped out. Experiments were conducted on a benchmark dataset, visual comparisons and performance evaluations with 9 existing methods have shown that the proposed method is robust and achieves the state-of-the-art performance.

关键词： Saliency detection Geodesic distance Saliency propagation Saliency map images Geodesic Performance Evaluation MAPPING(MATHEMATICAL) maps imagery (Psychotherapy) image propagation

来源：评论

学校读者我要写书评

暂无评论

Patching Method for Coverage Holes with Distance-Assistant in Wireless Sensor Networks

Patching Method for Coverage Holes with Distance-Assistant i...

引用

2013 International Conference on Computer,Networks and Communication Engineering(ICCNCE 2013)

作者： Zhengwei Guo Lin Zhu Department of Computer and Information Engineering Institute of Image Processing and Pattern Recognition Henan University Department of Computer and Information Technology Shangqiu Normal University

ISBN: (纸本)9781629932170

An effective approach for coverage holes was proposed, called Distance-assistant Coverage Hole Parching (DACHP) strategy. DACHP strategy would achieve the purpose of patching coverage holes using redundant sensor nodes within the wireless sensor networks. Simulation results show, compared with DFNFP and random algorithm, for the same size and shape coverage hole, DACHP can awaken five redundant nodes to patch 92.19% of hole, yet DFNFP needs awaken nine redundant nodes and just patch 90.28%. It can be seen that DFNFP not only awaken four extra nodes, but also is lower 1.19% in patching rate of hole than DACHP. In addition, DACHP is more stable in utilization of redundant nodes and does not produce additional cost.

关键词： wireless sensor networks coverage holes patching holes nodes utiliza

来源：评论

学校读者我要写书评

暂无评论

Automatic detection of slab surface defects base on the machine vision

Automatic detection of slab surface defects base on the mach...

引用

第五届宝钢学术年会

作者： CHEN Ziyi LAN Shouren FANG Zhihong XIA Yong WANG Lisheng YAN Jingqi Institute of Image Processing & Pattern Recognition Department of AutomationShanghai Jiaotong Unive Research Institute Baoshan Iron & Steel Co.Ltd.Shanghai 201900China

The surface quality of the steel slab directly affects the performance and quality of the final steel *** to the raw material,rolling equipment and processing technology,however,different types of surface defects might exist on the steel slab surface,such as scarring,crack,roll marks,scratches,pinholes,phosphorus leather,holes,pitting,*** defects not only affect the appearance of the steel products,but also reduce the performances of steel products,such as the corrosion resistance,wear resistance and fatigue strength of the ***,it is very important to detect and identify automatically surface defects of steel slab products on-line and to control and improve the surface quality of the steel *** is a very complex *** this paper,we introduce some machine vision techniques to detect and identify defects from the steel slab *** adaboost based machine leaming method is proposed to detect defects from steel slab *** is usually able to remove pseudo-defects.A directional detector based on wavelet transformation is used to detect directional structural crack feature from the complex steel slab surface.A saliency based method combining elastic threshold method and Gabor wavelet filter is used to detect crack from the steel slab *** results show the effectiveness of these methods.

关键词： the steel slab surface defect surface detection machine vision

来源：评论

学校读者我要写书评

暂无评论

Publishing rdf from relational database based on d2R improvement

引用

WSEAS Transactions on Information Science and Applications 2013年第8期10卷 241-248页

作者： Chen, Ying Zhao, Xiaoming Zhang, Shiqing Department of Computer Science Taizhou University 605 Dongfang Avenue Linhai Taizou Zhejiang China Institute of Image Processing and Pattern Recognition Taizhou University 605 Dongfang Avenue Linhai Taizou Zhejiang China

As a key technology to implement Semantic Web, linked data have gradually been an academic and industrial concern. Linked data represents a practice of technologies on the web and linked structure data. The goal of linked data is to enable people to share structured data on the web as easily as they can share documents today. On the Web of data structured with linked data, users can jump from one dataset to another. Compared with the Web of document which enables one to jump from one document to another, data Web provides much more links and has semantics. Mapping relational databases to RDF is a fundamental problem for the development of linked data. This paper firstly makes an improvement with R2RML to open source software named D2R which can publish linked data, and then takes an example of the data concerning a college enrollment in Sichuan of China in 2011, demonstrating that we can publish the data in RDB into RDF as linked data through the new approach more efficient and make it browsable.

关键词： Linked data

来源：评论

学校读者我要写书评

暂无评论

COST-SENSITIVE BACKGROUND SUBTRACTION

COST-SENSITIVE BACKGROUND SUBTRACTION

引用

IEEE International Conference on image processing

作者： Xiang Zhang Jian Cheng Zhi Liu Jie Yang School of Communication University of Electronic Science and Technology China School of Communication and Information Engineering Shanghai University China Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University China

ISBN: (纸本)9781479923427

Foreground and background are treated without distinction at classification stage in most background subtraction algorithms. However, correct classification of foreground is the primary requirement, and thus misclassification costs of the t-wo classes should be different. Based on this fact, we present a new method to introduce cost sensitivity into background subtraction, where a cost matrix is created to represent the costs of misclassification. Some items in the cost matrix are not constants, but functions of foreground occurence at each pixel location. By the use of such non-constant costs, detection rate of foreground is improved while increase of false alarms is prevented at the same time. Experiments demonstrate the effectiveness of the proposed algorithm.

关键词： background subtraction moving object segmentation cost-sensitive learning video surveillance video monitoring Subtraction Misclassification Object segmentation sort phase BACKGROUND False alarms centerpiece detection rate (DR)

来源：评论

学校读者我要写书评

暂无评论

AFFINE SOFTASSIGN WITH BIDIRECTIONAL DISTANCE FOR POINT MATCHING

AFFINE SOFTASSIGN WITH BIDIRECTIONAL DISTANCE FOR POINT MATC...

引用

IEEE International Conference on image processing

作者： Peng-peng Zhang Sheng-zheng Wang Yu Qiao Jie Yang Yong-hui Gao The Key Laboratory of Ministry of Education for System Control and Information Processing Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University China 200240 Merchant Marine College Shanghai Maritime University China 200235

ISBN: (纸本)9781479923427

This paper proposes a new affine registration algorithm for 2D point matching. It is a two-step iterative registration algorithm by soft weight assignment based on bidirectional distance. At each iteration, the affine transformation is updated by two optimization steps, in which the model data and the test data are matched from each other respectively. By the optimization of registration at separate steps during each iteration, the proposed algorithm can provide a good estimate of the accurate affine transformation in condition of poor initialization and lack of geometric assumptions on point sets. Some experiments about comparison with the current state-of-the art approaches, demonstrate the robustness and accuracy of our method.

关键词： affine soft assignment bidirectional distance point matching In-law Affine transformation Bidirectional Affine Registration observational data iterative methods

来源：评论

学校读者我要写书评

暂无评论

Feature points matching algorithm in DSA image registration

引用

Journal of Computational Information Systems 2013年第1期9卷 113-120页

作者： Zhang, Fan Hou, Yabin Cui, Yanbin Zhang, Xinhong Institute of Image Processing and Pattern Recognition Henan University Kaifeng 475001 China Equipment Management Department Henan University Kaifeng 475001 China College of Computer and Information Engineering Henan University Kaifeng 475001 China

Motion artifacts of digital subtraction angiography (DSA) are usually corrected by image registration. image registration is the process of transforming different sets of feature points into one coordinate system. Mismatches between the two sets of feature points will directly affect the image registration, and thus cause a lot of artifacts in the subtraction images. In this paper, a feature points matching algorithm is proposed. The similarity measure of feature point neighborhood is used to find the corresponding feature points, and delete a large number of non-existent corresponding feature points. It will improve image registration of DSA effectively. © 2013 Binary Information Press.

关键词： image registration

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：