code: def resolve_image_exif(self, image_url):
          
          files = self.mets.find_files(url=image_url)
          if files:
              image_filename = self.download_file(files[0]).local_filename
          else:
              image_filename = self.download_url(image_url)
  
          if image_url not in self.image_cache['exif']:
              self.image_cache['exif'][image_url] = OcrdExif(Image.open(image_filename))
          return self.image_cache['exif'][image_url]
docs: Get the EXIF metadata about an image URL as :class:`OcrdExif`
  
          Args:
              image_url (string) : URL of image
  
          Return
              :class:`OcrdExif`