Create an Aruco Board image with Python3

gistfile1.txt

import cv2 as cv
import numpy as np

dictionary = cv.aruco.Dictionary_get(cv.aruco.DICT_6X6_50)

num_markers_x = 4
num_markers_y = 4
marker_length = 0.04
marker_separation = 0.01

board = cv.aruco.GridBoard_create(
    num_markers_x,              # Number of markers in the X direction.
    num_markers_y,              # Number of markers in the Y direction.
    marker_length,              # Length of the marker side.
    marker_separation,          # Length of the marker separation.
    dictionary                  # The dictionary of the markers.
                                # (optional) Ids of all the markers (X*Y markers).
)

img = np.zeros((580,580), np.uint8) #4x4

# help(cv.aruco_GridBoard.draw)
# draw(outSize[, img[, marginSize[, borderBits]]]) -> img
img = board.draw( 
    img.shape,                  # Size of the output image in pixels.
    img,                        # Output image with the board
    0,                          # Minimum margins (in pixels) of the board in the output image
    1                           # Width of the marker borders
)

extension = ".jpg"
cv.imwrite("aruco_" +
            str(num_markers_x) + "x" + str(num_markers_y) + "_" +
            str(int(marker_length*100)) + "cm_length_" +
            str(int(marker_separation*100)) + "cm_space"
            + extension, img)
cv.imshow("aruco_board", img)
cv.waitKey(0)