Elon Computing Sciences

ACCURATE AND TIMELY ABSOLUTE LOCATION FOR AUGMENTED REALITY MOBILE APPLICATIONS

Colleen C. Brockmyre (Professor Joel Hollingsworth) Department of Computing Sciences

Augmented Reality (AR) is the technique of adding virtual artifacts to the real-world through the use of a mobile device. AR often requires knowledge of the user’s exact location. GPS is used to determine that location. GPS works great for applications that perform over large areas, but has serious limitations for smaller movements.

We have developed a pedestrian dead-reckoning assisted GPS system that provides both the necessary accuracy and the faster rate which is required by small-scale movement-based AR applications. Pedestrian dead-reckoning (PDR) refers to a system of measuring direction and movement through sensors inside the mobile device, such as the accelerometer. The PDR system that we developed converts accelerometer data into position values. We use PDR to alleviate the limitations of GPS. This hybrid system can produce the devices absolute location up to five times per second, even when moving. Small-scale movement-based AR mobile applications are now possible.