code: def sharpness(im, sharpness_lower, sharpness_upper):
      sharpness_delta = np.random.uniform(
          sharpness_lower, sharpness_upper
      )
      im = ImageEnhance.Sharpness(im).enhance(sharpness_delta)
      return im
  
imports: import cv2
  import numpy
  from PIL import Image, ImageEnhance
  from scipy.ndimage import distance_transform_edt
label_desc: Use image node_id 13 for calling a global function with example usage: sharpness(im, sharpness_lower, sharpness_upper) and returns: im