To cite package ‘pixelclasser’ in publications use:

  Real C (2023). _pixelclasser: Classifies Image Pixels by Colour_. R
  package version 1.1.1,
  <https://CRAN.R-project.org/package=pixelclasser>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {pixelclasser: Classifies Image Pixels by Colour},
    author = {Carlos Real},
    year = {2023},
    note = {R package version 1.1.1},
    url = {https://CRAN.R-project.org/package=pixelclasser},
  }