Robust Optical Flow from Photometric Invariants

@InProceedings\{VaG2004,
  author       = "Joost van de Weijer and Theo Gevers",
  title        = "Robust Optical Flow from Photometric Invariants",
  booktitle    = "IEEE International Conference on Image Processing",
  year         = "2004",
  address      = "Singapore",
  url          = "http://cat.cvc.uab.es/Public/Publications/2004/VaG2004"
}