Image Processing

Mix.install(
  [
    {:kino, "~> 0.7.0"},
    {:evision, "~> 0.1.21"},
    {:req, "~> 0.3"},
    {:kino_bumblebee, "~> 0.1.0"},
    {:exla, "~> 0.4.1"}
  ],
  config: [nx: [default_backend: EXLA.Backend]]
)

Section

%{body: image} =
  Req.get!("https://raw.githubusercontent.com/pjreddie/darknet/master/data/dog.jpg")

Kino.Image.new(image, :jpeg)

alias Evision, as: OpenCV
rotation = OpenCV.getRotationMatrix2D({512 / 2, 512 / 2}, 90, 1)

image
|> OpenCV.imdecode(OpenCV.cv_IMREAD_ANYCOLOR())
|> OpenCV.blur({9, 9})
|> OpenCV.warpAffine(rotation, {512, 512})
|> OpenCV.rectangle({50, 10}, {125, 60}, {255, 0, 0})
|> OpenCV.ellipse({300, 300}, {100, 200}, 30, 0, 360, {255, 255, 0}, thickness: 3)
|> dbg()

:ok