Journal of Information Processing
Online ISSN : 1882-6652
ISSN-L : 1882-6652
Method to Improve Accuracy of Indoor PDR Trajectories Using a Large Number of Trajectories
Kosuke YotsuyaKatsuhiro NaitoNaoya ChujoTadanori MizunoKatsuhiko Kaji
Author information

2020 Volume 28 Pages 44-54


Building structure information is essential for achieving various indoor location-based services (ILBSs). Our approach integrates a large amount of pedestrian trajectories acquired by pedestrian dead reckoning (PDR) for generating a pedestrian network structure. To generate highly accurate pedestrian network structures, the accuracy of each trajectory must be improved. In this paper, we propose a method to improve the accuracy of indoor PDR trajectories by using many such trajectories. First, we select reliable trajectories based on the stability of the sensing data. Next by analyzing the trend of the step lengths, we correct the length of the trajectories. Finally, with same-route trajectories, we generate average trajectories for each route. We experimentally used HASC-IPSC and found that our proposed method improved the accuracy of the trajectories. The cumulative error rate of the original pedestrian trajectories was 0.1111m/s. After adapting our proposed method, the rate improved to 0.0622m/s.

Content from these authors
© 2020 by the Information Processing Society of Japan
Previous article Next article