text: import numpy as np
  import cv2, PIL, os
  from cv2 import aruco
  from mpl_toolkits.mplot3d import Axes3D
  import matplotlib.pyplot as plt
  import matplotlib as mpl
  import pandas as pd
  #%matplotlib nbagg
  
  workdir = "calibration-pics/"
  aruco_dict = aruco.Dictionary_get(aruco.DICT_6X6_250)
  board = aruco.CharucoBoard_create(7, 5, 1, .8, aruco_dict)
  imboard = board.draw((6000, 6000))
  cv2.imwrite(workdir + "chessboard.jpg", imboard)
  fig = plt.figure()
  ax = fig.add_subplot(1,1,1)
  plt.imshow(imboard, cmap = mpl.cm.gray, interpolation = "nearest")
  ax.axis("off")
  plt.show()