Ruby で ImageScience を使ってサムネイル画像を作る

sudo apt -y update
sudo apt -yV upgrade
sudo /sbin/shutdown -r now

sudo apt -y update
sudo apt -y install rubygems 
sudo apt -y install libimage-science-ruby

irb1.8
require "rubygems"
require "image_science" 

ImageScience.with_image("/tmp/fruits.jpg") do |img|
  img.cropped_thumbnail(100) do |thumb|
    thumb.save "/tmp/a.jpg"
   end
end
exit