The virtual reality HMD is developed to enable interaction with the outside by combining cameras in the front, and will provide a 360 degree full-body tracking virtual reality game environment so that it can freely roam the room-scale area without any complicated line. However, compared to the development of devices, the actual space in which to operate it is still limited, which will be the biggest obstacle to freely exploring a wide range of virtual reality environments. In order to solve this problem, Redirected Walking, which allows people to explore the wide virtual reality space by tricking their cognitive ability, is under study, but there are unresolved problems and there is a permanent safety risk of virtual reality. In this paper, we propose an enhanced redirected walking that uses tof camera to control variables that lead to other directions before they can not go forward in the real world, and to visualize real spatial information in virtual reality game environment to cope with walls, obstacles, or sudden risk factors.

ABSTRACT
 1. Introduction
 2. Related research
  2.1 Redirection Walking
  2.2 SLAM
  2.3 Google Tango
 3. Implementation of redirection usingGoogle Tango
  3.1 Applications for Sensing Tango Depth
  3.2 Improved Redirect Walking
 4. Experiment and evaluation
  4.1 Experimental method
  4.2 Analysis
 5. Conclusion and future work
 Reference

• 강상천(Department of Computer Science, Hong-ik University) | Sang Cheon Kang
• 박 준(Department of Computer Science, Hong-ik University) | Jun Park Correspondence to