Curvature Estimation from Orientation Fields

@InProceedings\{VVV1999,
  author       = "Michael  van Ginkel and Joost van de Weijer and Lucas J.  van Vliet and Piet W. Verbeek",
  title        = "Curvature Estimation from Orientation Fields",
  booktitle    = "Scandinavian Conference on image Analysis (SCIA)",
  year         = "1999",
  address      = "Kangerlussuaq, Greenland",
  url          = "http://cat.cvc.uab.es/Public/Publications/1999/VVV1999"
}