# trim.rb

    require 'RMagick'
    include Magick

    # Demonstrate the trim method

    # Read the Flower_Hat image and reduce it to 80% of its original size.
    img = Image.read('images/Flower_Hat.jpg').first
    cols = img.columns
    rows = img.rows
    img.resize!(0.80)

    # Add a gray border to bring it back up to size
    before = img.border((cols-img.columns)/2, (rows-img.rows)/2, '#999')

    # Trim away the gray border
    after = before.trim

    # Add a white border to bring it back up to size
    after.border!((cols-img.columns)/2, (rows-img.rows)/2, 'white')

    # Need GIF for tranparency
    before.write('trim_before.jpg')
    after.write('trim_after.jpg')
    exit

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