gistfile1.txt

#get the attribute from a given url (image) by using OCR
  def ocr_attribute url
    dir = "/tmp/scrapers"
    file = rand(36**10).to_s(36)
    path = "#{dir}/#{file}"
    pnm_path = "#{dir}/#{file}.pnm"
    open(url) do |f|
      Dir.mkdir(dir) if !File.exists? dir
      image = Image.from_blob(f.read)[0]
      image.write(path)
    end
    system "convert #{path} #{pnm_path}"
    File.delete(path)
    attribute = %x(gocr -i #{pnm_path})
    File.delete(pnm_path)
    
    attribute.gsub("J", "3").gsub(/[oO]/, "0").gsub(/[-_]/, "").delete(" ").strip
  end