code: def filterFrame(frame):
      frame = imutils.resize(frame, width=450)
      frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
      frame = np.dstack([frame, frame, frame])
      return frame
  
file_path: imutils/demos/read_frames_fast.py
imports: from imutils.video import FileVideoStream
  from imutils.video import FPS
  import numpy
  import argparse
  import imutils
  import time
  import cv2
label_desc: Use image node_id 1 for calling a global function with example usage: filterFrame(frame) and returns: frame