A portable flight parameter measurement system is a standalone smart
camera which tracks the surface of an object in motion, e.g., a ball, and
determines speed, trajectory, a spin axis, and a spin rate around that
axis. The measurement system is particularly suited for analyzing the
path of a ball in flight which is determined, in great part, by the
amount of spin and the direction of spin imparted to the ball upon
impact. The measurement system provides a user, such as a golfer, with
important feedback for modifying his or her swing to obtain desired
results. The measurement system utilizes non-precision marks, surface
blemishes such as cuts made by a club, dimples, or a combination of all
three as the only features necessary to determine ball flight
characteristics.