@article{LayeredVectorisation,
  author    = {Christian Richardt and Jorge Lopez-Moreno and Adrien Bousseau and Maneesh Agrawala and George Drettakis},
  title     = {Vectorising Bitmaps into Semi-Transparent Gradient Layers},
  journal   = {Computer Graphics Forum (Proceedings of EGSR)},
  year      = {2014},
  volume    = {33},
  number    = {4},
  year      = {2014},
  url       = {http://richardt.name/layered-vectorisation/},
}