Flatten
Mix.install([
{:image, "~> 0.52"},
{:req, "~> 0.5"},
{:kino, "~> 0.14"}
])
画像の読込
original_img =
"https://www.elixirconf.eu/assets/images/drops.svg"
|> Req.get!()
|> Map.get(:body)
|> Image.from_binary!()
背景の塗りつぶし
Image.flatten!(original_img)
Image.flatten!(original_img, background_color: :blue)