code: def big(self):
          
          if self.settings['keep_orig']:
              s = self.settings
              if s['use_orig']:
                  # The image *is* the original, just use it
                  return self.filename
              orig_path = join(s['destination'], self.path, s['orig_dir'])
              check_or_create_dir(orig_path)
              big_path = join(orig_path, self.src_filename)
              if not isfile(big_path):
                  copy(self.src_path, big_path, symlink=s['orig_link'],
                       rellink=self.settings['rel_link'])
              return join(s['orig_dir'], self.src_filename)
docs: Path to the original image, if ``keep_orig`` is set (relative to the
          album directory). Copy the file if needed.