jq for images - experimental

iq 0.1.0
[email protected]

USAGE:
    iq [OPTIONS] [ARGS]

ARGS:
    <input_path>     The path to the input image
    <output_path>    Where to write the output image

OPTIONS:
    -b, --blank <dimensions>    Use a blank canvas of provided size 'HxW' (ex. '100x300')
    -e, --expr <expressions>    The expressions to evaluate
    -f, --file <file>           Pass a file containing expressions to run
    -h, --help                  Print help information
    -V, --version               Print version information

iq -e "_ => p(_.y, _.x, _.r, 0, 0)" assets/dalle_logo.png out.jpg

# Crop out a circle and replace the outside with a gradient
iq -e "[0:100, 0:100]" \
    assets/examples/dalle_philip_seymour_in_cars_movie.jpg \
    cropped_seymour.jpg

# Change any pixel with a green channel value greater than 128 to white
iq -e "_.g > 128 => p(_.y, _.x, 255, 255, 255) : _" \
    assets/examples/dalle_philip_seymour_in_cars_movie.jpg \
    highlight_mcqueen.jpg

# Crop out a circle and replace the outside with a gradient
iq -e "
    ([].w/2) >= sqrt(sq(_.x - center().x) + sq(_.y - center().y)) =>
        p(_.y, _.x, _.r, 255 - _.r, _.r) :
        p(_.y, _.x, (_.r * _.y) / [].h, (_.g * _.x) / [].w, 0)
" \
    assets/examples/dalle_philip_seymour_in_cars_movie.jpg \
    circle_seymour.jpg

# Superimpose a rotated version on the original;
iq -e "
    _ => p(_.y, _.x, _.r, _.g, _.b, _.a * 0.5);
    _ => p(_.x, _.y, _.r, _.g, _.b, _.a * 0.5);
" \
    assets/examples/dalle_ranch_testifying_in_court.jpg \
    rotate.jpg

# Crop into a circle and do sobel edge detection
iq -e "
  ([].w/2) >= sqrt(sq(_.x - center().x) + sq(_.y - center().y)) => color_norm(color_add(
      color_scale(neighbors(_, -1, -1), -1.0),
      color_scale(neighbors(_,  0, -1), -2.0),
      color_scale(neighbors(_,  1, -1), -1.0),
      color_scale(neighbors(_,  1, -1), 1.0),
      color_scale(neighbors(_,  1,  0), 2.0),
      color_scale(neighbors(_,  1,  1), 1.0)
  ));
" \
    assets/examples/dalle_ranch_testifying_in_court.jpg \
    circle_edge_ranch.jpg