Outliers in some Faces and non-Faces data

  • Authors:
  • Anna Bartkowiak

  • Affiliations:
  • University of Wroclaw, Institute of Computer Science, Joliot Curie 15, 50 383 Wroclaw, Poland/ Wroclaw High School of Applied Informatics, Wejherowska 28, 54 239 Wroclaw, Poland

  • Venue:
  • International Journal of Biometrics
  • Year:
  • 2010

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Abstract

We look for outliers in graphical data containing n = 6977 faces or non-faces images from Seung's collection. Our concern is: what kind of outliers may be found in such graphical data. To obtain the global geometrical characteristics, the Pseudo Grand Tour and Kohonens's self-organising maps are applied. We define as outliers those images which reproduce themselves badly from K principal components, with K denoting intrinsic dimension. The concept of mild and severe outliers, and own and alien principal components is also introduced.