code: def norm(image):
      """Normalize an image to [0, 1] range."""
      min_value = image.min()
      max_value = image.max()
      if min_value == max_value:
          return image - min_value
      return (image - min_value) / (max_value - min_value)
  
imports: import itertools
  import math
  import numpy
  import matplotlib
  import matplotlib.pyplot
  import IPython.display
  from mpl_toolkits.mplot3d import Axes3D
  from matplotlib.collections import PolyCollection
label_desc: Use image node_id 1 for calling a global function with example usage: norm(image) and returns: unknown, unknown