Improved Curvature and Anisotropy Estimation for Curved Line Bundles

@InProceedings\{VVV1998,
  author       = "Piet W. Verbeek and Lucas J.  van Vliet and Joost van de Weijer",
  title        = "Improved Curvature and Anisotropy Estimation for Curved Line Bundles",
  booktitle    = "Int. Conference on Pattern Recognition (ICPR)",
  month        = "aug",
  year         = "1998",
  address      = "Brisbane, Australia",
  url          = "http://cat.cvc.uab.es/Public/Publications/1998/VVV1998"
}