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Remote Sensing Feature Selection by Kernel Dependence Estimation




This letter introduces a nonlinear measure of independence between random variables for remote sensing supervised feature selection. The so-called Hilbert–Schmidt independence criterion (HSIC) is a kernel method for evaluating statistical dependence and it is based on computing the Hilbert–Schmidt norm of the cross-covariance operator of mapped samples in the corresponding Hilbert spaces. The HSIC empirical estimator is easy to compute and has good theoretical and practical properties. Rather than using this estimate for maximizing the dependence between the selected features and the class labels, we propose the more sensitive criterion of minimizing the associated HSIC p-value. Results in multispectral, hyperspectral, and SAR data feature selection for classification show the good performance of the proposed approach.

Author(s): Camps-Valls, G. and Mooij, JM. and Schölkopf, B.
Journal: IEEE Geoscience and Remote Sensing Letters
Volume: 7
Number (issue): 3
Pages: 587-591
Year: 2010
Month: July
Day: 0

Department(s): Empirical Inference
Bibtex Type: Article (article)

Digital: 0
DOI: 10.1109/LGRS.2010.2041896
Language: en
Organization: Max-Planck-Gesellschaft
School: Biologische Kybernetik

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  title = {Remote Sensing Feature Selection by Kernel Dependence Estimation},
  author = {Camps-Valls, G. and Mooij, JM. and Sch{\"o}lkopf, B.},
  journal = {IEEE Geoscience and Remote Sensing Letters},
  volume = {7},
  number = {3},
  pages = {587-591},
  organization = {Max-Planck-Gesellschaft},
  school = {Biologische Kybernetik},
  month = jul,
  year = {2010},
  month_numeric = {7}