import cv2 as cv

boardSize = (5, 5)
dict = cv.aruco.getPredefinedDictionary(cv.aruco.DICT_4X4_50)

charucoBoard = cv.aruco.CharucoBoard(boardSize, 100., 85., dict)
arucoBoard = cv.aruco.GridBoard(boardSize, 100., 10., dict)

[ WARN:0@0.010] global aruco_board.cpp:555 cv::aruco::CharucoBoard::CharucoBoard marker separation:7.5 is less than 0.7 pin of ArUco marker:9.91667, too small separators can degrade the quality of detection, increase squareLength or decrease markerLength

[ WARN:0@0.010] global aruco_board.cpp:258 cv::aruco::GridBoard::GridBoard marker separation:10 is less than 0.7 pin of ArUco marker:11.6667, too small separators can degrade the quality of detection, increase markerSeparation or decrease markerLength

python gen_pattern.py -o charuco_board.svg --rows 7 --columns 5 -T charuco_board --square_size 30 --marker_size 26 -f DICT_5X5_100.json.gz
marker separation:2.0 is less than 0.7 pin of ArUco marker:2.6, too small separators can degrade the quality of detection, increase square_size or decrease marker_size