System and method for determining liveness using face rotation

A method of 3D face shape verification, comprising:

• verifying that a user is positioned in front of a user device so that head rotation angles are no more than 10 degrees;
• capturing an image of the user's head at an initial position;
• generating a PIN and transmitting it to the user device;
• upon receipt of the PIN, instructing the user to rotate his head to a first position indicated by the PIN and a corresponding graphic;
• capturing an image of the user's head at the first position;
• repeating instructions to the user to rotate his head for all remaining values of the PIN, and capturing images of the user's head at positions corresponding to the remaining values of the PIN;
• transforming yaw and pitch angles of the user's head in all the captured images into a graph in polar coordinates;
• transforming the graph into a phase map;
• sending the phase map into a classifier;
• determining, using the classifier, whether the user's head is a live 3D face or a different object;
• and
• outputting a result of the determination.