make my images cyrcled

cut_to_cyrcle.rb

require 'rubygems'
require 'RMagick'

include Magick

def cut_to_cyrcle(path_to_image)
  folder = path_to_image.split('/')[0..-2].join('/')
  name = path_to_image.split('/').last.split('.')[0]

  puts "Trying open #{path_to_image}"
  im = Magick::Image.read(path_to_image).first

  circle = Magick::Image.new 200, 200
  gc = Magick::Draw.new
  gc.fill 'black'
  gc.circle 100, 100, 100, 1
  gc.draw circle

  mask = circle.blur_image(0,1).negate

  mask.matte = false
  im.matte = true
  im.composite!(mask, Magick::CenterGravity, Magick::CopyOpacityCompositeOp)

  im.write "#{folder}/#{name}_cyrcle.png"
  puts "Save into #{folder}/#{name}_cyrcle.png"
end

folders = ['/home/tsyren/tmp/images/origin', '/home/tsyren/tmp/images/hosts']

folders.each do |folder|
  Dir.entries(folder).each do |file|
    unless file == '..' or file == '.'
      cut_to_cyrcle("#{folder}/#{file}") 
    end
  end  
end