ALEXANDRIA, Va., June 9 -- United States Patent no. 12,288,345, issued on April 29, was assigned to AUDI AG (Ingolstadt, Germany).

"Six-degree-of-freedom (6DOF) tracking of mobile head mounted displays (HMDs)" was invented by Christoph Weigand (Gaimersheim, Germany) and Stefan Mayer (Gaimersheim, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "When at least one mobile head-mounted display (HMD) is located in at least one vehicle, a control unit of the HMD performs inside-out tracking based on a six-degree-of-freedom (6DOF) algorithm with the aid of at least one camera image captured by at least one camera, using a 6DOF-algorithm-based translation of the at least one mobile HMD. The HMD control unit ex...