-OpenCV static matrices changed to Eigen matrices. The average code speed-up is 16% in tracking and 19% in mapping, w.r.t. times reported in the ORB-SLAM3 paper. -New calibration file format, see file Calibration_Tutorial. Added options for stereo rectification and image resizing. -Added load/save map functionalities. -Added examples of live SLAM using Intel Realsense cameras. -Fixed several b...