Images – Théo Boulakia

Convertir une image

convert image.jpg image.png

Compresser une image

convert image.jpg[50%x50%] -quality 70 compressed_image.jpg

Passer en nuances de gris

Ici, on utilise le package magick, qui rend accessible depuis R la librairie ImageMagick.

Hyla japonica, 1er septembre 2008, 池田正樹 (talk) masaki ikeda, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons

gray_frog = magick::image_read(
  "https://upload.wikimedia.org/wikipedia/commons/5/5a/Hyla_japonica_sep01.jpg"
  ) |> 
  magick::image_quantize(colorspace = "gray")
gray_frog

Citation

BibTeX

@online{boulakia2023,
  author = {Boulakia, Théo},
  title = {Images},
  date = {2023-10-09},
  url = {https://tblk.github.io/data-tips/images/},
  langid = {fr}
}

Veuillez citer ce travail comme suit :

Boulakia, Théo. 2023. “Images.” October 9, 2023. https://tblk.github.io/data-tips/images/.