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Semisupervised Feature Selection for Unbalanced Sample Sets of VHR Images

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4 Author(s)
Xi Chen ; Autom. Dept., Shanghai Jiao Tong Univ., Shanghai, China ; Tao Fang ; Hong Huo ; Deren Li

A semisupervised feature selection method, named asymmetrically local discriminant selection (ALDS), is proposed to evaluate the class separability of unbalanced sample sets from very high resolution (VHR) imagery in an object-oriented classification. In order to cope with class imbalance, ALDS incorporates asymmetric misclassification costs of classes into weight matrices. Furthermore, this method locally exploits multiple kinds of relationships between sample pairs to more accurately assess the ability of features in preserving the geometrical and discriminant structures. The experimental results on VHR satellite and airborne imagery attest to the effectiveness and practicability of ALDS.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:7 ,  Issue: 4 )

Date of Publication:

Oct. 2010

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