code: def _get_current_scale(self, im_target_size, im_size):
      return im_target_size / im_size
  
imports: import copy
  import math
  import random
  import numpy
  from copy import deepcopy
  from typing import List, Tuple
  from collections import defaultdict
  from .chip_box_utils import nms, transform_chip_boxes2image_boxes
  from .chip_box_utils import find_chips_to_cover_overlaped_boxes
  from .chip_box_utils import transform_chip_box
  from .chip_box_utils import intersection_over_box
label_desc: Use image node_id 9 for calling the AnnoCropper obj's underlying member method code with example usage: obj._get_current_scale(im_target_size, im_size) and returns: unknown