Ellipse center extraction is the important basis of camera calibration with circle arrays calibration board. which directly affects the measurement accuracy of machine vision system. Aiming at the problem of high noise sensitivity of the most ellipse center extraction methods. a high robust multi-ellipse center extraction method is proposed. https://www.roneverhart.com/Short-Porch-Mortar-USSSA-Pro-M-12-Slowpitch-Softballs/