Lee, Juyoung Ahn, Sang Chul Hwang, Jae-In 2024-01-19T22:02:06Z 2024-01-19T22:02:06Z 2021-09-03 2018-09 1424-8220 https://pubs.kist.re.kr/handle/201004/120999 People are interested in traveling in an infinite virtual environment, but no standard navigation method exists yet in Virtual Reality (VR). The Walking-In-Place (WIP) technique is a navigation method that simulates movement to enable immersive travel with less simulator sickness in VR. However, attaching the sensor to the body is troublesome. A previously introduced method that performed WIP using an Inertial Measurement Unit (IMU) helped address this problem. That method does not require placement of additional sensors on the body. That study proved, through evaluation, the acceptable performance of WIP. However, this method has limitations, including a high step-recognition rate when the user does various body motions within the tracking area. Previous works also did not evaluate WIP step recognition accuracy. In this paper, we propose a novel WIP method using position and orientation tracking, which are provided in the most PC-based VR HMDs. Our method also does not require additional sensors on the body and is more stable than the IMU-based method for non-WIP motions. We evaluated our method with nine subjects and found that the WIP step accuracy was 99.32% regardless of head tilt, and the error rate was 0% for squat motion, which is a motion prone to error. We distinguish jog-in-place as "intentional motion" and others as "unintentional motion". This shows that our method correctly recognizes only jog-in-place. We also apply the saw-tooth function virtual velocity to our method in a mathematical way. Natural navigation is possible when the virtual velocity approach is applied to the WIP method. Our method is useful for various applications which requires jogging. English MDPI ENVIRONMENTS IMU A Walking-in-Place Method for Virtual Reality Using Position and Orientation Tracking Article 10.3390/s18092832 1 SENSORS, v.18, no.9 SENSORS 18 9 scie scopus 000446940600091 2-s2.0-85052592172 Chemistry, Analytical Engineering, Electrical & Electronic Instruments & Instrumentation Chemistry Engineering Instruments & Instrumentation Article ENVIRONMENTS IMU position and orientation tracking head-mounted display motion analysis gait walking-in-place virtual velocity virtual reality