检索结果-内蒙古大学图书馆

International Journal of Database Theory and Application 2014年第6期7卷 29-44页

作者： Chen, Ying Xu, Zhuoming Ni, Yuyan Cao, Guangxu Zhang, Shiqing College of Computer and Information Hohai University Nanjing Jiangsu China Institute of Image Processing and Pattern Recognition Taizhou University Taizhou Zhejiang China

Mapping RDB to RDF (i.e., RDB2RDF) is the key to constructing the Semantic Web, hence has been an active research field during the last decade. Many technically heterogeneous RDB2RDF tools resulted in non-interchangeable and unreusable RDB2RDF mapping descriptions. In 2009, the W3C RDB2RDF Incubator Group Report once strongly suggested that the RDB2RDF mapping language be expressed in rules as defined by the W3C Rule Interchange Format (RIF) Working Group, because rules are an effective way to express mappings between information models, and RIF, as part of the infrastructure for the Semantic Web, is now a standard for exchanging rules among Web rule systems. This paper addresses the issue of RIF-based RDB2RDF mapping and proposes a database semantics-driven, RIF Production Rule Dialect (RIF-PRD) based mapping description approach. The work includes defining a set of generic RIF-PRD mapping rules for RDB2RDF, developing a prototype mapping engine called RIFD2RME (stands for RIF-based RDB2RDF Mapping Engine), and conducting case study experiments with the prototype. The experimental results indicate that the proposed mapping approach is achievable and effective.

关键词： Mapping

来源：评论

学校读者我要写书评

暂无评论

EFFECTIVE SMALL DIM TARGET DETECTION BY LOCAL CONNECTEDNESS CONSTRAINT

EFFECTIVE SMALL DIM TARGET DETECTION BY LOCAL CONNECTEDNESS ...

引用

IEEE International Conference on Acoustics, Speech and Signal processing

作者： Keren Fu Kai Xie 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)9781479928941

The main drawback of conventional filtering based methods for small dim target (SDT) detection is they could not guarantee sufficient suppression ability towards trivial high frequency component which belongs to background, such as strong corners and edges. To overcome this bottleneck, this paper proposes an effective SDT detection algorithm by using local connectedness constraint. Our method provides direct control for target size, ensure high accuracy and could be easily embedded into the classical sliding-window based framework. The effectiveness of the proposed method is validated using images with cluttered background.

关键词： Object detection Direct control clutter background images sliding windows Detection algorithms BACKGROUND

来源：评论

学校读者我要写书评

暂无评论

Visual tracking based on weighted subspace reconstruction error

Visual tracking based on weighted subspace reconstruction er...

引用

IEEE International Conference on image processing

作者： Tao Zhou Junhao Zhang Kai Xie Jie Yang Xiangjian He Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University China Faculty of Engineering and Information Technology University of Technology Sydney Australia

ISBN: (纸本)9781479957521

It is a challenging task to develop an effective and robust visual tracking method due to factors such as pose variation, illumination change, occlusion, and motion blur. In this paper, a novel tracking algorithm based on weighted subspace reconstruction error is proposed. We first compute the discriminative weights by sparse construction error with template dictionary consisted of positive and negative samples, and then confidence map for candidates is computed through subspace reconstruction error. Finally, the location of the target object is estimated by maximizing the decision map which is combined discriminative weights and subspace reconstruction error. Furthermore, we use the new evaluation criterion to verify the robustness of the current tracking result, which can reduce the accumulated error effectively. Experimental results on some challenging video sequences show that the proposed algorithm performs favorably against seven state-of-the-art methods in terms of accuracy and robustness.

关键词： Target tracking Dictionaries Robustness image reconstruction Visualization Computer vision

来源：评论

学校读者我要写书评

暂无评论

Automatic image annotation exploiting textual and visual saliency

Lecture Notes in Computer Science (including subseries Lectu...

引用

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8836卷 95-102页

作者： Gu, Yun Xue, Haoyang Yang, Jie Jia, Zhenhong Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Shanghai China School of Information Science and Engineering Xinjiang University Urumqi China

Automatic image annotation is an attractive service for users and administrators of online photo sharing websites. In this paper, we propose an image annotation approach exploiting visual and textual saliency. For textual saliency, a concept graph is firstly established based on the association between the labels. Then semantic communities and latent textual saliency are detected;For visual saliency, we adopt a dual-layer BoW (DL-BoW) model integrated with the local features and salient regions of the image. Experiments on NUS-WIDE dataset demonstrate that the proposed method outperforms other state-of-the-art approaches. © Springer International Publishing Switzerland 2014.

关键词： image annotation

来源：评论

学校读者我要写书评

暂无评论

3-D centerline extraction for virtual cardiovascular endoscopy

3-D centerline extraction for virtual cardiovascular endosco...

引用

International Conference on Wavelet Active Media Technology and Information processing (ICWAMTIP)

作者： Jing Li Xin Yang Li Ping Yao Kun Sun Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Shanghai China Xinhua Hospital Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9781479972098

This paper discusses centerline extraction algorithms for virtual cardiovascular endoscopy system. A fully automatic extraction method is proposed which is significantly enhanced from current distance mapping method. The new approach consists of four steps: preprocessing; construction of improved Distance From Boundary field; centerline extraction; mean value smoothing of centerline. Based on the proposed automatic approach, an interactive extraction method is presented in which a centerline connects specified points selected by cardiologists. This interactive approach makes the viewport closer to pathological changes in the aorta and human heart, so cardiologists can observe focuses more clearly. The two algorithms have been applied to the virtual cardiovascular endoscopy system, and the experiments prove that our methods work well in the process of auxiliary diagnosis.

关键词： Endoscopes Heart Navigation Computed tomography Biomedical imaging Smoothing methods Cavity resonators

来源：评论

学校读者我要写书评

暂无评论

Topological image Analysis and (Normalised) Representations for Plant Phenotyping

Topological Image Analysis and (Normalised) Representations ...

引用

International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC)

作者： Ines Janusch Walter G. Kropatsch Wolfgang Busch Pattern Recognition and Image Processing Group Vienna University of Technology Vienna Austria Gregor Mendel Institute of Molecular Plant Biology Austrian Academy of Sciences Vienna Austria

This paper discusses the use of topological image analysis to derive characteristics needed in plant phenotyping. Due to certain features of root systems (deformation over time, overlaps of branches in a 2D image of the root system) a topological analysis is needed to correctly derive these characteristics. The advantages of such a topological analysis are highlighted in this paper and root phenotyping is presented as a new application for computational topology. Characteristics used in plant phenotyping that can be derived from root images using methods of topological image analysis are further presented. A Reeb graph based representation of root images is shown as an example for such a topological analysis. Based on a graph representation a new, normalised representation of root images is introduced.

关键词： image segmentation Level measurement Topology Length measurement Skeleton image analysis Soil

来源：评论

学校读者我要写书评

暂无评论

Analysis of the Pencil of Conics with Double Complex Contact and Its Application to Camera Calibration

引用

Journal of Shanghai Jiaotong university(Science) 2013年第1期18卷 1-6页

作者：蔡琴王宸昊阎炎刘允才 Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University Information and Communication Technology Department University of Trento

In this paper, we introduce a novel class of coplanar conics, the pencil of which can doubly contact to calibrate camera and estimate pose. We first analyze the properties of con-axes and con-eccentricity ellipses, which consist of a naturM extending pattern of concentric circles. Then the general case that two ellipses have two repeated complex intersection points is presented. This degenerate configuration results in a one-parameter family of homographies which map the planar pattern to its image. Although it is unable to compute the complete homography, an indirect 3-degree polynomial or 5-degree polynomial constraint on intrinsic parameters from one image can also be used for camera calibration and pose estimation under the minimal conditions. Furthermore, this nonlinear problem can be treated as a polynomial optimization problem （POP） and the global optimization solution can be also obtained by using SparsePOP （a sparse semidefinite programming relaxation of POPs）, Finally, the experiments with simulated data and real images are shown to verify the correctness and robustness of the proposed technique.

关键词： camera calibration homography con-axes and con-eccentricity ellipse concentric circle polynomial optimization problem （POP）

来源：评论

学校读者我要写书评

暂无评论

EBR analysis of digital image watermarking

Advances in Intelligent Systems and Computing

引用

Advances in Intelligent Systems and Computing 2014年 255卷 11-18页

作者： Zhang, Fan Zhang, Xinhong College of Computer and Information Engineering Henan University Kaifeng475001 China Institute of Image Processing and Pattern Recognition Henan University Kaifeng475001 China Software School Henan University Kaifeng475001 China

ISBN: (纸本)9788132217589

An error bit rate (EBR) analysis of digital image watermarking is proposed based on information theory. This work researches how to embed a large number of watermark information in the same time maintaining a low error probability or researches the relationship between watermark payload capacity and EBR. The EBR of watermarking will drop with the decrease in watermark payload capacity. When payload capacity is less than channel capacity, the EBR will keep in a lower level. © Springer India 2014.

关键词： Bit error rate

来源：评论

学校读者我要写书评

暂无评论

Computer-aided 3D reconstruction and implant planning of auricular prosthesis

Computer-aided 3D reconstruction and implant planning of aur...

引用

2014年上海市研究生学术论坛:生物医疗仪器

作者： Shuang.Li Chunlong.Fang Liuyao.Duan Yuanliang.Huang Lisheng.Wang Institute of Image Processing and Pattern Recognition Department of AutomationShanghai Jiaotong UniversityShanghaiChina Department of dentistryShanghai East Hospital affiliated to Tongji UniversityShanghai 200210China

Auricular-prosthesis-based techniques have been developed for years to repair ears with *** order to obtain good aesthetics and functional effects of the auricular prosthesis,the following two steps are necessary: generate a suitable 3D model of the auricular prosthesis and implant the auricular prosthesis on the patient's ***,there may exist some problems in the current methods,generation of an auricular prosthesis might be costly,imprecise,and ***,clinical physicians usually make a preoperative surgery planning just based on their observation on the series of 2D X-ray images or CT images,which increase the uncertainty of the *** consideration of the limitations in the existing techniques,we develop a computer-aided ear-repairing system to solve these *** mainly contains two parts: 3D reconstruction of auricular prosthesis model and preoperative surgery planning for implanting the auricular ***,the system provides an interactive technique to reconstruct a good 3D model of auricular prosthesis from the patient's CT *** to the model,a high-quality auricular prosthesis can be fabricated by the CAD/CAM technique or 3D print ***,through this system,preoperative surgery planning of implanting can be done and the implanting result can be *** the surgery planning,the surgeon can implant an auricular prosthesis on the patient's skull stably and *** results show that the proposed system can improve the accuracy,safety and intuition of the surgical planning and enhance the functional and aesthetics effects of auricular prosthesis.

关键词： CT imaging auricular prosthesis 3D reconstruction implant surgery planning

来源：评论

学校读者我要写书评

暂无评论

A robust CPD approach based on shape context

A robust CPD approach based on shape context

引用

Chinese Control Conference (CCC)

作者： Yawen Yang Zhang Peng Peng Yu Qiao Jie Yang Sheng Zheng Wang The Key Laboratory of Ministry of Education for System Control and Information Processing Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Shanghai CN Merchant Marine College Shanghai Maritime University Shanghai CN

Point matching is an important component of image registration. Recent years, Coherent Point Drift (CPD) method becomes a very popular point matching approach. CPD treats point matching as a probability estimation problem and speeds up the process of matching a lot. In this method, one set of points are thought to be sampled from a Gaussian Mixture Model (GMM), which is centered by the other set of points. However, CPD is sensitive to outliers and noises, especially when the noise ratio increased or the number of outliers gets much high. To deal with this problem, we introduce shape context into the step of searching for matching points and then improve the form of prior probabilities of GMM in this paper. The main idea of our method is that if the most points in a data set are likely to be matched to a particular centroid, this Gaussian component should be have a more influence to GMM. Therefore, we set prior probability of GMM with the similarity between GMM components and the data set. And the computation of similarity is based on shape context. The experiments on 2D and 3D images show that when noise ratio is low, our method performs as well as CPD does, but as the ratio increased, our method is more robust and satisfactory than CPD.

关键词： Noise Shape Testing Context Robustness Three-dimensional displays Marine animals

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：