code: def Posterize(img, v):  # [4, 8]
      v = int(v)
      v = max(1, v)
      return PIL.ImageOps.posterize(img, v)
  
imports: import random
  import numpy
  import PIL
  import PIL.ImageDraw
  import PIL.ImageEnhance
  import PIL.ImageOps
  import torch
  from PIL import Image
label_desc: Use image node_id 14 for calling a global function with example usage: Posterize(img, v) and returns: PIL