Robot plays rock, paper, scissors

Researchers in Japan have invented a robot that can play 'rock, paper, scissors' - and win every time.

It uses a high-speed camera to follow the shape and position of its human rival's hand to predict their next move.

Determining whether the resulting hand sign will be rock, paper or scissors, the technology's system changes the angle of the robotic hand's wrist joint accordingly.

Researchers at the University of Tokyo are behind the robot, called Janken, which means 'fist games'.

It is hoped that similar technology may be applied to motion support of humans and cooperation work between people and robots.