@Article{fischl1999:adaptive,
  author =       {Fischl, B. and Schwartz, E. L.},
  title =        {Adaptive non-local filtering: A fast alternative to
                  anisotropic diffusion for image segmentation},
  journal =      {IEEE Pattern Analysis and Machine Intelligence},
  volume =       21,
  number =       1,
  pages =        {42--48},
  month =        Jan,
  year =         1999,
  datestr =      199901,
  INSPEC =       6171836,
  abstract =     {Nonlinear anisotropic diffusion algorithms provide
                  significant improvement in image enhancement as
                  compared to linear filters. However, the excessive
                  computational cost of solving nonlinear PDEs
                  precludes their use in real-time vision
                  applications. We show that two orders of magnitude
                  speed improvement is provided by a new image
                  filtering paradigm in which an adaptively determined
                  vector field specifies nonlocal application points
                  for an image filter},
  keywords =     {adaptive filters;filtering theory;image enhancement},
}