  This technical report describes a modular and extensible architecture for
computing visual statistics in RoboCup SPL (MARIO), presented during the SPL
Open Research Challenge at RoboCup 2022, held in Bangkok (Thailand). MARIO is
an open-source, ready-to-use software application whose final goal is to
contribute to the growth of the RoboCup SPL community. MARIO comes with a GUI
that integrates multiple machine learning and computer vision based functions,
including automatic camera calibration, background subtraction, homography
computation, player + ball tracking and localization, NAO robot pose estimation
and fall detection. MARIO has been ranked no. 1 in the Open Research Challenge.
