The first step is simply for a player to note the time it takes for the ball to pass a fixed point to get a rough approximation of the velocity of the ball.
Of course, casinos tend to frown on precise measurements and computer simulations by their gamblers, so the researchers developed a simpler method of predicting the outcome of a roulette game that could be deployed without notice. 'In some cases you can beat them quite significantly.' 'Knowing the initial conditions allows you to beat the odds,' said Michael Small, who carried out the study with Chi Kong Tse, in a press release.