An Indoor Navigation System Based on Stereo Camera and Inertial Sensors with Points and Lines

• Main Authors: Bo Yang, Xiaosu Xu, Tao Zhang, Yao Li, Jinwu Tong
• Format: Article
• Language: English
• Published: Hindawi Limited 2018-01-01
• Series: Journal of Sensors
• Online Access: http://dx.doi.org/10.1155/2018/4801584

An indoor navigation system based on stereo camera and inertial sensors with points and lines is proposed to further improve the accuracy and robustness of the navigation system in complex indoor environments. The point and line features, which are fast extracted by ORB method and line segment detector (LSD) method, are both employed in this system to improve its ability to adapt to complex environments. In addition, two different representations of lines are adopted to improve the efficiency of the system. Besides stereo camera, an inertial measurement unit (IMU) is also used in the system to further improve its accuracy and robustness. An estimator is designed to integrate the camera and IMU measurements in a tightly coupled approach. The experimental results show that the performance of the proposed navigation system is better than the point-only VINS and the vision-only navigation system with points and lines.