Tightly-Coupled Stereo Visual-Inertial Navigation Using Point and Line FeaturesReport as inadecuate




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College of Mechatronics and Automation, National University of Defense Technology, Changsha 410073, China





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Academic Editor: Vittorio M.N. Passaro

Abstract This paper presents a novel approach for estimating the ego-motion of a vehicle in dynamic and unknown environments using tightly-coupled inertial and visual sensors. To improve the accuracy and robustness, we exploit the combination of point and line features to aid navigation. The mathematical framework is based on trifocal geometry among image triplets, which is simple and unified for point and line features. For the fusion algorithm design, we employ the Extended Kalman Filter EKF for error state prediction and covariance propagation, and the Sigma Point Kalman Filter SPKF for robust measurement updating in the presence of high nonlinearities. The outdoor and indoor experiments show that the combination of point and line features improves the estimation accuracy and robustness compared to the algorithm using point features alone. View Full-Text

Keywords: vision-aided inertial navigation; point and line features; trifocal geometry; tightly-coupled vision-aided inertial navigation; point and line features; trifocal geometry; tightly-coupled





Author: Xianglong Kong, Wenqi Wu * , Lilian Zhang and Yujie Wang

Source: http://mdpi.com/



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