@ARTICLE{Luengo2005a,
  author = {Luengo Hendriks, Cris L. and van Vliet, Lucas J.},
  title = {Using Line Segments as Structuring Elements for Sampling-Invariant Measurements},
  journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
  year = {2005},
  volume = {27},
  pages = {1826-1831},
  number = {11},
  doi = {10.1109/TPAMI.2005.228}
}