~/.earthquake/plugin/image.rb

image.rb

#coding: utf-8

require 'open-uri'
require 'RMagick'

Earthquake.init do
  command :image do |m|
    url = m[1]
    blob = open(url).read
    image = Magick::Image.from_blob(blob).shift

    (0..image.rows).each do |y|
      line = (0..image.columns).map do |x|
        p = image.pixel_color(x, y)
        r = (p.red   * 6.0 / 256 / 256).to_i * 36
        g = (p.green * 6.0 / 256 / 256).to_i *  6
        b = (p.blue  * 6.0 / 256 / 256).to_i *  1
        c = 16 + r + g + b
        "\e[48;5;#{c}m  \e[m"
      end.join

      puts line
    end
  end
end