code: def loadImage(filename):  # adapted for Python
      img = Image.open(filename)
      w, h = img.size
      x = np.array(img)[::-1].tostring()
      assert len(x) == w * h
      return x, w, h
  
file_path: vispy/examples/demo/gloo/jfa/jfa_translation.py
imports: import numpy
  from os import path
  from vispy.ext import glfw
  from vispy.io import load_data_file
  from OpenGL import GL
  from OpenGL import GLU
  from PIL import Image
  import time
label_desc: Use image node_id 3 for calling a global function with example usage: loadImage(filename) and returns: x,  w,  h