Least squares and robust estimation of local image structure

@InProceedings\{VaV2003,
  author       = "Rein van den Boomgaard and Joost van de Weijer",
  title        = "Least squares and robust estimation of local image structure",
  booktitle    = "Proceedings of Scale-Space Conference",
  year         = "2003",
  address      = "Isle of Skye, Scotland, UK",
  url          = "http://cat.cvc.uab.es/Public/Publications/2003/VaV2003"
}