参考文献: [1]Huang B , Zhao J , Liu J . A Survey of Simultaneous Localization and Mapping[J]. 2019. [2]刘浩敏, 章国锋, 鲍虎军. 基于单目视觉的同时定位与地图构建方法综述[J]. 计算机辅助设计与图形学学报, 2016, 28(6):855-868. [3]Davison A J, Reid I D, Molton N D, et al. MonoSLAM: realtime single camera SLAM[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 2007, 29(6):1052-1067. [4]Kummerle R , Grisetti G , Strasdat H , et al. G2o: A general framework for graph optimization[C]// Robotics and Automation (ICRA), 2011 IEEE International Conference on. IEEE, 2011. [5]Polok L . Incremental Cholesky Factorization for Least Squares Problems in Robotics[C]// Intelligent Autonomous Vehicles. 2013. [6]Klein G , Murray D . Parallel Tracking and Mapping for Small AR Workspaces[C]// Mixed and Augmented Reality, 2007. ISMAR 2007. 6th IEEE and ACM International Symposium on. ACM, 2007. [7]Mur-Artal R , Montiel J M M , Tardos J D . ORB-SLAM: a Versatile and Accurate Monocular SLAM System[J]. IEEE Transactions on Robotics, 2015, 31(5):1147-1163. [8]Mur-Artal R , Tardos J D . ORB-SLAM2: An Open-Source SLAM System for Monocular, Stereo, and RGB-D Cameras[J]. IEEE Transactions on Robotics, 2017:1-8. [9]D. Galvez-L ´ opez and J. D. Tard ´ os, “Bags of binary words for fast place recognition in image sequences,” IEEE Transactions on Robotics, vol. 28, no. 5, pp. 1188–1197, 2012. [10]Sivic, Zisserman. Video Google: a text retrieval approach to object matching in videos[C]// Proceedings Ninth IEEE International Conference on Computer Vision. IEEE, 2003. [11]Robertson, Stephen. Understanding inverse document frequency: on theoretical arguments for IDF[J]. Journal of Documentation, 2004, 60(5):503-520.