نتایج جستجو برای: svdd

تعداد نتایج: 154  

Journal: :JSW 2011
Chuanxu Wang

Support vector data description (SVDD) has become a very attractive kernel method due to its good results in many novelty detection problems.Training SVDD involves solving a constrained convex quadratic programming,which requires large memory and enormous amounts of training time for large-scale data set.In this paper,we analyze the possible changes of support vector set after new samples are a...

2013
Ian Dear

The one-class support vector machine “support vector data description” (SVDD) is an ideal approach for anomaly or outlier detection. However, for the applicability of SVDD in real-world applications, the ease of use is crucial. The results of SVDD are massively determined by the choice of the regularisation parameter C and the kernel parameter σ of the widely used RBF kernel. While for two-clas...

Journal: :TIIS 2015
Hansung Lee Daesung Moon Ikkyun Kim Hoseok Jung Daihee Park

The Support Vector Data Description (SVDD) has achieved great success in anomaly detection, directly finding the optimal ball with a minimal radius and center, which contains most of the target data. The SVDD has some limited classification capability, because the hyper-sphere, even in feature space, can express only a limited region of the target class. This paper presents an anomaly detection...

Journal: :Neural computation 2007
Jooyoung Park Daesung Kang Jongho Kim James T. Kwok Ivor W. Tsang

The support vector data description (SVDD) is one of the best-known one-class support vector learning methods, in which one tries the strategy of using balls defined on the feature space in order to distinguish a set of normal data from all other possible abnormal objects. The major concern of this letter is to extend the main idea of SVDD to pattern denoising. Combining the geodesic projection...

Journal: :CoRR 2016
Arin Chaudhuri Deovrat Kakde Maria Jahja Wei Xiao Hansi Jiang Seunghyun Kong Sergiy Peredriy

Support Vector Data Description (SVDD) is a machine learning technique used for single class classification and outlier detection. The SVDD model for normal data description builds a minimum radius hypersphere around the training data. A flexible description can be obtained by use of Kernel functions. The data description is defined by the support vectors obtained by solving quadratic optimizat...

Journal: :Journal of Chemical Engineering of Japan 2023

Support vector data description (SVDD) is a classical process monitoring skill and usually uses Euclidean distance to evaluate the status of process. It should be noted that proposed evaluation method restricts detection performance for some faults, when overall fault has structural deviation compared with normal data. To address this problem, novel incipient diagnosis scheme based on kernel de...

2016
Zahra Ghafoori Sutharshan Rajasegarar Sarah M. Erfani Shanika Karunasekera Christopher Leckie

Although the hyper-plane based One-Class Support Vector Machine (OCSVM) and the hyper-spherical based Support Vector Data Description (SVDD) algorithms have been shown to be very effective in detecting outliers, their performance on noisy and unlabeled training data has not been widely studied. Moreover, only a few heuristic approaches have been proposed to set the different parameters of these...

2011
Eric J. Pauwels Onkar Ambekar

The Support Vector Data Description (SVDD) has been introduced to address the problem of anomaly (or outlier) detection. It essentially fits the smallest possible sphere around the given data points, allowing some points to be excluded as outliers. Whether or not a point is excluded, is governed by a slack variable. Mathematically, the values for the slack variables are obtained by minimizing a...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده مهندسی 1390

در سالهای اخیر ماشین بردار پشتیبان svdd بطور فزاینده ای در کاربردهای مرتبط با طبقه بندی تک کلاسه، مورد استفاده قرار گرفته است. هدف svdd ارائه یک توصیف فشرده از مجموعه ای از داده ها بنام کلاس هدف است بطوریکه فضای توزیع این داده ها را از فضای نمونه های دیده نشده مرتبط با سایر کلاسها جدا کند. یکی از چالشهای svdd این است که مرز آن تنها با نمونه های بیرونی توصیف شده و نمونه های داخلی و چگالی توزیع د...

2007
Alireza Tavakkoli Amol Ambardekar Mircea Nicolescu Sushil J. Louis

Detecting regions of interest in video sequences is one of the most important tasks of most high level video processing applications. In this paper a novel approach based on Support Vector Data Description (SVDD) is presented which detects foreground regions in videos with quasi-stationary backgrounds. The SVDD is a technique used in analytically describing the data from a set of population sam...

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