Warp perspective

Mix.install([
  {:image, "~> 0.38"},
  {:nx, "~> 0.6"},
  {:req, "~> 0.3"},
  {:kino, "~> 0.12"}
])

Prepare image

ryo_img =
  "https://www.elixirconf.eu/assets/images/ryo-wakabayashi.png"
  |> Req.get!()
  |> Map.get(:body)
  |> Image.from_binary!()

text_image =
  Image.Text.text!(
    "Hello, Livebook!",
    font_weight: 600,
    text_fill_color: :blue
  )

composed_image =
  ryo_img
  |> Image.compose!(text_image, x: 100, y: 450)
  |> Image.compose!(text_image, x: 100, y: 500)
  |> Image.compose!(text_image, x: 100, y: 550)

Execution

source = [{-900, 0}, {0, 600}, {1500, 0}, {600, 600}]
destination = [{0, 250}, {0, 600}, {600, 250}, {600, 600}]

[
  composed_image,
  Image.warp_perspective!(composed_image, source, destination, background: :blue)
]
|> Kino.Layout.grid(columns: 2)