# This gets called as Image.from("directory"){|i| some_code}

  def self.scan(directory, debug = false, &block)
    puts block.inspect if block
    return nil unless File.directory?(directory)
    tens = 0; count = 0
    Dir.entries(directory).map do |file|
      if count == 10
        tens += 1; count = 0
        print "."; STDOUT.flush
      end
      next if [".", ".."].include?(file) or File.directory?(file)
      if block_given?
        i = Image.ping("#{directory}/#{file}") rescue next
        # next unless yield i.first
        next unless block.call(i.first).call
      else
        Image.ping("#{directory}/#{file}") rescue next
      end
      # This might be handy in large directories...
      GC.start
      count += 1 if debug
      "#{directory}/#{file}"
    end.compact
  end

  def self.from(collection, &block)
    if collection.is_a?(String)
      collection = (block) ? scan(collection) { block } : scan(collection)
    end
    puts collection.inspect
    i = Image.read(collection.random)
    return i if i.size > 1
    i.first
  end