/** @brief Extend base dictionary by new nMarkers
  *
  * @param nMarkers number of markers in the dictionary
  * @param markerSize number of bits per dimension of each markers
  * @param baseDictionary Include the markers in this dictionary at the beginning (optional)
  * @param randomSeed a user supplied seed for theRNG()
  *
  * This function creates a new dictionary composed by nMarkers markers and each markers composed
  * by markerSize x markerSize bits. If baseDictionary is provided, its markers are directly
  * included and the rest are generated based on them. If the size of baseDictionary is higher
  * than nMarkers, only the first nMarkers in baseDictionary are taken and no new marker is added.
  */
CV_EXPORTS_W Dictionary extendDictionary(int nMarkers, int markerSize, const Dictionary &baseDictionary = Dictionary(),
                                         int randomSeed=0);

cv::aruco::Dictionary base_dictionary = cv::aruco::getPredefinedDictionary(cv::aruco::DICT_4X4_250);
cv::aruco::Dictionary custom_dictionary= cv::aruco::extendDictionary(150, 4, base_dictionary);