The Application of Activity Recognition Algorithm Based on Three-Dimensional Accelerometer in Virtual Reality Field

This paper aims at the head mounted display (HMD) equipment based on smart phones, puts forward ainteractive mode in order to improve the immersion of virtual reality (VR) games and applications. Its core is a real-time humanmotion analysis algorithmbased ontri-axial acceleration (TA) sensor. This algorithm uses smart phone built-in sensor to obtain the real-time TA signal produced by human movement, after the processing and classification to the signal through the threshold value method to classify motion state of user, such as: stand, walk, run and jump. Then the results directly reflected in the virtual scene, make user do the same behavior in VR games and applications. The experimental results show that the algorithm can quickly and accurately determine some motions, ensures that the user can get higherimmersion in VR experiences.