code: def apply(self, resource):
          
          if not isinstance(resource, Image.Image):
              raise ValueError('Unknown resource format')
  
          original_width, original_height = resource.size
  
          if self.start[0] < original_width or self.start[1] < original_height:
              left = self.start[0]
              upper = self.start[1]
          else:
              left = 0
              upper = 0
  
          right = self.start[0] + self.size[0]
          lower = self.start[1] + self.size[1]
  
          resource_format = resource.format
          resource = resource.crop(
              (
                  left,
                  upper,
                  right if right < original_width else original_width,
                  lower if lower < original_height else original_height
              )
          )
          resource.format = resource_format
  
          return resource
docs: Apply filter to resource
          :param resource: Image
          :return: Image