Feature extraction for hyperspectral images based on semi-supervised local linear discriminant analysis

Wenzhi Liao, Aleksandra Pizurica, Wilfried Philips, Youguo Pi, Uwe Stilla (Editor), P Gamba, C Juergens (Editor), D Maktav (Editor)

Research output: Contribution to conferencePaperpeer-review

13 Citations (Scopus)


We propose a novel semi-supervised local discriminant analysis (SELD) method for feature extraction in hyperspectral remote sensing imagery. The proposed method combines a supervised method (Linear Discriminant Analysis (LDA)) and an unsupervised method (Neighborhood Preserving Embedding (NPE)) without any free parameters. The underlying idea is to design optimal projection vectors, which can discover the global discriminant structure of the available labeled samples while preserving the local neighborhood spatial structure of the unlabeled samples. Furthermore, in our approach the number of extracted feature bands is no longer limited by the number of classes, which is a disadvantage of LDA. Experimental results demonstrate that the proposed method outperforms consistently other related semi-supervised methods and that it is also much more stable when the percentage of the labeled samples changes.
Original languageEnglish
Number of pages4
Publication statusPublished - 5 May 2011
EventJoint Urban Remote Sensing Event (JURSE - 2011) - Munich, Germany
Duration: 11 Apr 201113 Apr 2011


ConferenceJoint Urban Remote Sensing Event (JURSE - 2011)
Abbreviated titleJURSE 2011


  • feature extraction
  • hyperspectral remote sensing
  • classification
  • principal component analysis
  • geophysical image processing
  • image colour analysis


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