To cite image.ContourDetector in publications use:

von Gioi G, Rafael, Randall, Gregory (2016). “Unsupervised Smooth Contour Detection.” Image Processing On Line, 6, 233–267. https://doi.org/10.5201/ipol.2016.175.

Wijffels J, von Gioi G (2017). “image.ContourDetector: image.ContourDetector: an R package to detect contour lines in images.” R package version 0.1.0, https://github.com/bnosac/image.

Corresponding BibTeX entries:

  @Article{,
    title = {Unsupervised Smooth Contour Detection},
    author = {Grompone {von Gioi} and {Rafael} and {Randall} and
      {Gregory}},
    journal = {Image Processing On Line},
    year = {2016},
    volume = {6},
    pages = {233--267},
    url = {https://doi.org/10.5201/ipol.2016.175},
  }

  @Unpublished{,
    title = {{image.ContourDetector}: image.ContourDetector: an R
      package to detect contour lines in images},
    author = {Jan Wijffels and Grompone {von Gioi}},
    year = {2017},
    url = {https://github.com/bnosac/image},
    organization = {BNOSAC},
    note = {R package version 0.1.0},
  }