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检索条件"主题词=Change Detection Algorithms"

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Coding for low complexity detection of multiple insertion/deletion errors

Coding for low complexity detection of multiple insertion/de...

引用

IEEE International Symposium on Information Theory

作者： W.A. Clarke H.C. Ferreira ESKOM NPTM and C Simmerpan Germiston South Africa

Two new methods for the detection of multiple insertion/deletions are presented. The first method recognises insertions/deletions in the previous symbol stream by extracting additional information from commonly used markers. A new coding method is also presented that relies on the number of transitions in a codeword to detect insertions/deletions in the previous codeword. This coding scheme also has certain spectral properties.

关键词： Decoding Data mining Table lookup Tail Africa Additives change detection algorithms Logic gates Monitoring

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Distributed Online Simultaneous Fault detection for Multiple Sensors

Distributed Online Simultaneous Fault Detection for Multiple...

引用

International Symposium on Information Processing in Sensor Networks (IPSN)

作者： Ram Rajagopal XuanLong Nguyen Sinem Coleri Ergen Pravin Varaiya SAMSI and Department of Statistical Science Duke University USA WSN Berkeley Laboratory Pirelli and Telecom Italia Italy Electrical Engineering and Computer Sciences University of California Berkeley USA

ISBN: (纸本)9780769531571

Monitoring its health by detecting its failed sensors is essential to the reliable functioning of any sensor network. This paper presents a distributed, online, sequential algorithm for detecting multiple faults in a sensor network. The algorithm works by detecting change points in the correlation statistics of neighboring sensors, requiring only neighbors to exchange information. The algorithm provides guarantees on detection delay and false alarm probability. This appears to be the first work to offer such guarantees for a multiple sensor network. Based on the performance guarantees, we compute a tradeoff between sensor node density, detection delay and energy consumption. We also address synchronization, finite storage and data quantization. We validate our approach with some example applications.

关键词： Fault detection change detection algorithms Fault diagnosis Probability Time measurement Electrical fault detection Condition monitoring Working environment noise Delay effects Vehicles

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Development of the brightness quality improving system with the video region detection algorithm

Development of the brightness quality improving system with ...

引用

IEEE International Symposium on Industrial Electronics (ISIE)

作者： NamWoong Kong ByungHoon Kang MiRim Ha PooGyeon Park Hyun Jin So Department of Electrical and Computer Engineering Pohang University of Science and Technology Pohang GyungBuk Korea IT Product Planning Team LG Display Co.Ltd. Gumi GyungBuk Korea

This paper proposes an algorithm for detecting the video region and improving the video quality on a digital monitor. The proposed algorithm is implemented in the circuit board we developed. The algorithm finds the video region by checking where pixels change on a digital monitor. After detecting the video region, a brightness of the video is improved by using the gamma curve. From the experimental results, the proposed algorithm detects the video region well for any video size and improves the brightness of the video.

关键词： Brightness detection algorithms change detection algorithms Computerized monitoring Chapters Computer displays Gamma ray detection Gamma ray detectors Regions Histograms

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Balancing procedure for an IVD bridge

Balancing procedure for an IVD bridge

引用

IEEE Instrumentation and Measurement Technology Conference

作者： S. Avramov-Zamurovic B. Waltrip K. Stricklett A. Koffman Weapons and Systems Engineering Department United States Naval Academy Annapolis MD USA Electricity Division National Institute for Standards and Technology Gaithersburg MD USA

This paper presents a detector balancing procedure for a bridge based on the straddling method that is used to calibrate inductive voltage dividers (IVDs). A bridge of this type requires multiple, simultaneous balances, which, due to interactions between the various circuit networks involved, are difficult to achieve in practice. An algorithm will be demonstrated that achieves balances on the order of 1 part in 10/sup 9/.

关键词： Bridge circuits Virtual colonoscopy Voltage Detectors change detection algorithms NIST Current measurement Iterative methods Iterative algorithms Weapons

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Oblique needle segmentation for 3D TRUS-guided robot-aided transperineal prostate brachytherapy

Oblique needle segmentation for 3D TRUS-guided robot-aided t...

引用

IEEE International Symposium on Biomedical Imaging

作者： Zhouping Wei L. Gardi D.B. Downey A. Fenster University of Western Ontario London ONT Canada Imaging Research Laboratories Robarts Research Institute London ONT Canada Department of Radiology London Health Sciences Centre London ONT Canada

ISBN: (纸本)0780383885

3D TRUS-guided robot-aided prostate brachytherapy provides tools for dynamic re-optimization of a dose plan by freeing needle insertions from parallel trajectory constraints, i.e., needle trajectories can be positioned with considerable flexibility including oblique. However, oblique insertion results in the needle intersecting the 2D TRUS image and appearing as a dot, leading to blind guidance. Here, we propose a method for oblique needle segmentation and tracking to be used in a 3D TRUS guided and robot aided prostate brachytherapy system. This algorithm applies a grey-level change detection technique to find the location and orientation of needles from 3D images. Three 2D images containing the needle (oblique sagittal, coronal and transverse planes) are extracted and displayed in near real-time. Testing showed that our algorithm can find 3D needle orientation within 0.54/spl deg/ for a chicken tissue phantom, and 0.58/spl deg/ for agar phantoms, over a /spl plusmn/15/spl deg/ insertion orientation. The execution time averaged 0.13s on a 1.2 GHz computer.

关键词： Needles Brachytherapy Image segmentation Robot kinematics Trajectory Medical treatment Imaging phantoms Ultrasonic imaging Parallel robots change detection algorithms

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Image stabilization algorithms for video-surveillance applications

Image stabilization algorithms for video-surveillance applic...

引用

IEEE International Conference on Image Processing

作者： L. Marcenaro G. Vernazza C.S. Regazzoni Department of Biophysical and Electronic Engineering (DIBE) University of Genoa Genoa Italy

An image stabilization algorithm is presented that is specifically oriented toward video-surveillance applications. The proposed approach is based on a novel motion-compensation method that is an adaptation of a well-known image-stabilization algorithm for visualization in video-surveillance applications. In particular, the illustrated methods take into account the specificity of typical video-surveillance applications, where objects moving in a scene often cover a large part of an image thus causing the failure of classic image-stabilization techniques. Evaluation methods for image stabilization algorithms are discussed.

关键词： Surveillance Cameras Layout Image sensors Object detection change detection algorithms Image registration Consumer electronics Visualization Video sequences

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The Single Dimensional Edge detection Method for the Intelligent Image sensor

The Single Dimensional Edge Detection Method for the Intelli...

引用

International Baltic Electronics Conference, BEC

作者： J. Trestik J. Fischer Department of Measurement Faculty of Electrical Engineering Czech Technical University Prague Czech Republic

This paper presents an edge detection method for single dimensional image signal. The method is intended for embedded applications. Two dimensional signal processing requires great memory and powerful image processor which is a problem in low cost embedded applications (e.g. (Trestik, 2005)). Necessity of special edge detection method has arisen during an intelligent image sensor developing. The intelligent sensor is based on CMOS image sensor and programmable logical device. The single dimensional image signal is available line by line from the CMOS image sensor

关键词： Image edge detection Intelligent sensors Image sensors Convolution CMOS image sensors Circuit noise Position measurement change detection algorithms Power engineering and energy Power capacitors

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A failure detection and isolation algorithm for a decentralised multisensor system

A failure detection and isolation algorithm for a decentrali...

引用

International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)

作者： M. Fernandez H.F. Durrant-Whyte Department of Engineering Science University of Oxford Oxford UK

This paper describes an algorithm for detecting and isolating failures and its application on a multisensor decentralized system. We consider decentralized systems as a network of local processors where communication is performed only between neighbouring nodes. Local observations are taken by each node, and using the information form of the Kalman filter, local information contributions are calculated. These are then communicated and a global estimate is computed. The failure and isolation technique described in this paper is based on the use of multiple models, which describe the changes on the system dynamics when a failure is produced.< >

关键词： Multisensor systems Sensor phenomena and characterization Bandwidth Parameter estimation Recursive estimation change detection algorithms Large-scale systems Sensor fusion Sensor systems Network topology

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Shortest paths in randomly time varying networks

Shortest paths in randomly time varying networks

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International Conference on Intelligent Transportation

作者： R. Cerulli P. Festa G. Raiconi Dipartimento di Inforniatica ed Applicazioni Universita di Salemo Baronissi Italy

A dynamic single-source single-destination shortest path problem on a directed graph is considered. The edge lengths are not constant, but they change as a function of time in a random way. The problem is modeled as a multi-stage decision process and solved by using a re-optimization method that solves the /spl iota/.th stage using the results of the solution of the (/spl iota/-1).th one. An algorithm, called the dynamical shortest path algorithm, is proposed for solving the global problem either finding a solution or detecting that the problem is infeasible and an upper bound on its running time is found. Numerical examples are reported in order to show the effectiveness of the method.

关键词： Intelligent networks Shortest path problem Heuristic algorithms Disaster management Emergency services change detection algorithms Upper bound Operations research Artificial intelligence Intelligent robots

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Improved watershed segmentation algorithm for high resolution remote sensing images using texture

Improved watershed segmentation algorithm for high resolutio...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Ziyu Wang Cuiyu Song Zhongzhong Wu Xiuwan Chen Institute of Remote Sensing & GIS Peking University Beijing China Shandong University of Science and Technology China

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