    #! /usr/local/bin/ruby -w
    #
    # Demonstrate the Image#thumbnail method, new in ImageMagick 5.5.2
    # This method is faster than Image#resize when the thumbnail is
    # < 1/10 the size of the original image.

    require 'RMagick'

    img = Magick::Image.read("images/Cheetah.jpg").first
    begin
        thumbnail = img.thumbnail(img.columns*0.09, img.rows*0.09)

    # Substitute the standard "Not Implemented" image
    rescue NotImplementedError
        thumbnail = Magick::Image.read("images/notimplemented.gif").first
    end
    #thumbnail.display
    thumbnail.write("thumbnail.jpg")
    exit