Rmagick is an interface that enables people to use ImageMagickTM and GraphicsMagick image processing libraries in Ruby to make it more convenient to process images. For example, you can rotate an image 90 degrees like this:
Require 'rmagick'
Clown = Magick :: imagelist.new ("clown.jpg")
Clown = CLOWN.ROTATE (90)
Clown.write ('rotate.jpg')
Sa
RMagick Home:
http://rmagick.rubyforge.org/