#!/usr/bin/env ruby -w require 'rmagick' # Demonstrate the Image#affine_transform method img = Magick::Image.read('images/Flower_Hat.jpg').first # Construct a simple affine matrix flipflop = Magick::AffineMatrix.new(1, Math::PI/6, Math::PI/6, 1, 0, 0) # Apply the transform img = img.affine_transform(flipflop) # Scale the image, make the background transparent, # and write it to a JPEG file. img.scale!(250.0/img.rows) img = img.matte_replace(0,0) img.write('affine_transform.jpg') exit