检索结果-内蒙古大学图书馆

Shape-based retrieval of industrial surface defects using angular radius Fourier descriptor

IET image processing 2007年第2期1卷 231-236页

作者： Kunttu, I. Lepisto, L. Tampere Univ Technol Inst Signal Proc FI-33101 Tampere Finland

Current industrial surface inspection systems are capable of detecting various defects and producing images of them. The defect images are collected into large image databases. Effective retrieval methods are necessary to analyse the defects stored in the database. In this work, a novel shape descriptor for surface defect image retrieval is presented. The descriptor is based on the Fourier transform of the defect boundary. The proposed method, angular radius Fourier descriptor, combines the boundary function with the directional angle of the boundary line. The proposed method outperforms ordinary Fourier descriptors in the retrieval of paper defect shapes without increasing computational cost.

关键词： image databases Spatial and pictorial databases Fourier transform industrial surface inspection systems angular radius Fourier descriptor boundary function Inspection and quality control computer vision and image processing techniques production engineering computing Integral transforms Mathematical analysis content-based retrieval Information retrieval techniques industrial surface defect image retrieval shape-based retrieval Industrial applications of IT Fourier transforms inspection visual databases Production engineering computing image retrieval

来源：评论

学校读者我要写书评

暂无评论

Classified image compression using optimally structured auto-association networks

引用

IET image processing 2007年第2期1卷 189-196页

作者： Abbas, H. M. Mentor Graphics Corp Cairo 11341 Egypt

Here, an application of a set of auto-association networks with linear output neurons and sigmoidal hidden neurons for classified image compression is carried out. Simulations and statistical analysis of this type of network have shown that, at convergence, the hidden neurons operate mainly in their linear region. The nearly linear behaviour of the hidden neurons is exploited in finding out the minimum number of hidden neurons needed to reconstruct image data within a certain error threshold. Four optimally structured auto-association networks are set up so that each network is trained to encode a certain variance-based class of image blocks. Results have shown excellent performance of the proposed architecture in reproducing high-quality images at a low bit rate.

关键词： sigmoidal hidden neurons optimally structured auto-association networks linear output neurons statistical analysis computer vision and image processing techniques image classification image and video coding image coding image data reconstruction image blocks classified image compression Other topics in statistics image reconstruction

来源：评论

学校读者我要写书评

暂无评论

Detection and localisation of magnetic objects

引用

IET SCIENCE MEASUREMENT & TECHNOLOGY 2007年第5期1卷 245-254页

作者： Barrell, Y. Naus, H. W. L. TNO Def Security & Safety NL-2509 JG The Hague Netherlands

Detection and localisation of hidden magnetic objects is studied. The concomitant disturbance of the earth magnetic field is exploited. Magnetic fields and or gradients are measured with a number of sensors. Two point models for magnetic fields are selected for the analysis: the magnetic dipole and its quadrupole extension. It is shown how to apply least squares analysis of the data in order to detect and localise magnetised objects. The theoretical framework is tested in simulations, including noise. Two methods to do the minimisation are chosen. The formalism performs well in the simulations. Detection and localisation of the model objects is successful. No decisive differences in performance of the two minimisation methods are found. Results for the position parameters are reliable in any case. We have evaluated the goodness of fit in our simulations. Theoretical and simulated chi-square distributions are compared for different fit models and noise distributions with satisfactory results. The obtained parameter distributions are Gaussian. Measurements are performed to test the algorithms on real data collected for three ferromagnetic objects: a magnet, pipe and block. The magnet is easily localised, the pipe reasonably well. The block cannot be localised: its field variations cannot be distinguished from background field variations. Subsequent simulations show that using gradiometers improves the performances of the algorithms. The effects of a number of controllable parameters are evaluated.

关键词： computer vision and image processing techniques earth magnetic field hidden magnetic objects Gaussian distribution least squares analysis object detection Interpolation and function approximation (numerical analysis) magnetic fields concomitant disturbance least squares approximations object localisation Gaussian parameter distributions quadrupole extension Optical, image and video signal processing magnetic object detection Magnetostatics magnetic dipole Other topics in statistics

来源：评论

学校读者我要写书评

暂无评论

Editorial: IET image processing

引用

IET image processing 2007年第1期1卷 1-1页

作者： Deravi, Farzin

No abstract available

关键词： IET image processing visual communication General electrical engineering topics computer vision and image processing techniques image processing visual information processing visual information generation Institution of Engineering and Technology Optical, image and video signal processing General and management topics

来源：评论

学校读者我要写书评

暂无评论

Knowledge-based digital media processing

引用

IEE PROCEEDINGS-vision image AND SIGNAL processing 2006年第3期153卷 253-254页

作者： Izquierdo, Ebroul Univ London Queen Mary Multimedia & Vis Lab London WC1E 7HU England Univ London Queen Mary Dept Elect Engn London WC1E 7HU England

No abstract available

关键词： low-level analysis Learning in AI image classification knowledge-based digital media processing Multimedia image segmentation Expert systems and other AI software and techniques computer vision and image processing techniques multimedia systems aceMedia Optical, image and video signal processing visual data high-level analysis semantics extraction learning (artificial intelligence) COST292 classification semantic-based structuring knowledge based systems multimedia data

来源：评论

学校读者我要写书评

暂无评论

Visual tracking: a very short research roadmap

引用

ELECTRONICS LETTERS 2006年第5期42卷 254-256页

作者： Blake, A Microsoft Res Cambridge CB3 OFB England

A research roadmap to many of the best known, and most used, contributions to visual tracking is set out. The scope includes simple appearance models, active contours and spatiotemporal filtering, and briefly points t... 详细信息

关键词： Optical, image and video signal processing spatiotemporal filtering computer vision and image processing techniques video signal processing Video signal processing visual tracking tracking spatiotemporal phenomena appearance models object detection image matching active contours

来源：评论

学校读者我要写书评

暂无评论

vision enabled robots have 'eyes' for you

引用

COMPUTING & CONTROL ENGINEERING JOURNAL 2005年第6期15卷 19-20页

作者： Winchester, S

A NEW GENERATION OF vision ENABLED ROBOTS IS ABLE TO MAKE DECISIONS BASED ON SENSORY FEEDBACK FROM THEIR ENVIRONMENT. THEY CAN ADAPT TO PERHAPS ANY MANUFACTURING SCENARIO.

关键词： sensory feedback machine vision technology vision enabled robots Control applications in manufacturing processes robot vision Robotics Control engineering computing manufacturing environment image sensors industrial robots computer vision and image processing techniques industrial control image sensors

来源：评论

学校读者我要写书评

暂无评论

Visual Media Production

引用

IEE PROCEEDINGS-vision image AND SIGNAL processing 2005年第4期152卷 385-386页

作者： Grau, O Hilton, A Univ Surrey Visual Media Res Grp Guildford GU2 5XH Surrey England

No abstract available

关键词： Graphics techniques Optical, image and video signal processing visual media production image processing computer vision computer graphics computer vision and image processing techniques Video signal processing video signal processing

来源：评论

学校读者我要写书评

暂无评论

Editorial: Recent advances in image and video retrieval

引用

IEE Proceedings: vision, image and Signal processing 2005年第6期152卷 851-851页

作者： O'Connor, Noel E. Kompatsiaris, Ioannis Centre for Digital Video Processing Dublin City University Ireland IEEE United Kingdom IEE Visual Information Engineering Technical Advisory Panel United Kingdom ISO/IEC MPEG United Kingdom EU COST 292 Initiative United Kingdom Informatics and Telematics Institute Thessaloniki Greece Technical Chamber of Greece Greece

来源：评论

学校读者我要写书评

暂无评论

The PC for high-end surface inspection: practical or problematic?

引用

COMPUTING & CONTROL ENGINEERING JOURNAL 2004年第4期15卷 15-18页

作者： Millman, M Shelton Vision Systems United States

In the 1980s, machine vision surface inspection developed a bad name, because many application demands were greater than available software and hardware techniques. However, the situation has now changed. vision systems easily out-perform human inspection. The pc has become the choice of system platforms for running a surface inspection vision system.

关键词： high-end surface inspection Production engineering computing surface inspection vision system machine vision surface inspection PC microcomputer applications Industrial applications of IT production engineering computing Optical, image and video signal processing computer vision Inspection and quality control computer vision and image processing techniques automatic optical inspection

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：