# polaroid.rb

    #!/usr/local/bin/ruby18 -w
    require 'RMagick'
    require 'date'

    # Demonstrate the Image#polaroid method

    img = Magick::Image.read('images/Flower_Hat.jpg').first
    img[:Caption] = "\nLosha\n" + Date.today.to_s

    begin
        picture = img.polaroid { self.gravity = Magick::CenterGravity }

        # Composite it on a white background so the result is opaque.
        background = Magick::Image.new(picture.columns, picture.rows)
        result = background.composite(picture, Magick::CenterGravity, Magick::OverCompositeOp)

    rescue NotImplementedError
        result = Magick::Image.read('images/notimplemented.gif').first
        result.resize!(img.columns, img.rows)
    end

    result.write('polaroid.jpg')

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