Edge and keypoint detection in facial regions
@InProceedings{herpers96afgr,
  author = 	 {R. Herpers and M. Michaelis and K.H. Lichtenauer and G. Sommer},
  title = 	 {Edge and keypoint detection in facial regions},
  booktitle = 	 {Proc. 2nd Int. Conf. on Automatic Face and Gesture Recognition, Killington},
  year =	 1996,
  publisher =	 {IEEE Comp. Soc.},
  pages =        {212--217}
}