Credal classification rule for uncertain data based on belief functions

PATTERN RECOGNITION

卷:47

Article

Liu, Zhun-ga^1,2  Pan, Quan¹  Dezert, Jean³  Mercier, Gregoire² 

[1] Northwestern Polytech Univ, Sch Automat, Xian 710072, Shaanxi, Peoples R China

[2] Telecom Bretagne, CNRS UMR Lab STICC CID 6285, Brest, France

[3] Off Natl Etud & Rech Aerosp, F-91761 Palaiseau, France

关键词: Credal classification;    Data classification;    Belief functions;    Evidence theory;    Uncertain data;   

DOI  :  10.1016/j.patcog.2014.01.011

来源: Elsevier

【 摘 要 】

In this paper we present a new credal classification rule (CCR) based on belief functions to deal with the uncertain data. CCR allows the objects to belong (with different masses of belief) not only to the specific classes, but also to the sets of classes called meta-classes which correspond to the disjunction of several specific classes. Each specific class is characterized by a class center (i.e. prototype), and consists of all the objects that are sufficiently close to the center. The belief of the assignment of a given object to classify with a specific class is determined from the Mahalanobis distance between the object and the center of the corresponding class. The meta-classes are used to capture the imprecision in the classification of the objects when they are difficult to correctly classify because of the poor quality of available attributes. The selection of meta-classes depends on the application and the context, and a measure of the degree of indistinguishability between classes is introduced. In this new CCR approach, the objects assigned to a meta-class should be close to the center of this meta-class having similar distances to all the involved specific classes' centers, and the objects too far from the others will be considered as outliers (noise). CCR provides robust credal classification results with a relatively low computational burden. Several experiments using both artificial and real data sets are presented at the end of this paper to evaluate and compare the performances of this CCR method with respect to other classification methods. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free