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## Overview
<img src="https://raw.githubusercontent.com/introlab/rtabmap/master/guilib/src/images/RTAB-Map.png" alt="RTAB-Map logo" title="RTAB-Map" align="left" width="120">
**RTAB-Map** (Real-Time Appearance-Based Mapping) is a RGB-D, Stereo and Lidar Graph-Based SLAM approach based on an incremental appearance-based loop closure detector. The loop closure detector uses a bag-of-words approach to determinate how likely a new image comes from a previous location or a new location. When a loop closure hypothesis is accepted, a new constraint is added to the map's graph, then a graph optimizer minimizes the errors in the map. A memory management approach is used to limit the number of locations used for loop closure detection and graph optimization, so that real-time constraints on large-scale environnements are always respected. RTAB-Map can be used alone with a handheld Kinect, a stereo camera or a 3D lidar for 6DoF mapping, or on a robot equipped with a laser rangefinder for 3DoF mapping.
#### Lidar and Visual SLAM
* M. Labbé and F. Michaud, “[RTAB-Map as an Open-Source Lidar and Visual SLAM Library for Large-Scale and Long-Term Online Operation](https://introlab.3it.usherbrooke.ca/mediawiki-introlab/images/7/7a/Labbe18JFR_preprint.pdf),” in _Journal of Field Robotics_, accepted, 2018. ([Wiley](https://doi.org/10.1002/rob.21831))
#### Simultaneous Planning, Localization and Mapping (SPLAM)
* M. Labbé and F. Michaud, “[Long-term online multi-session graph-based SPLAM with memory management](https://introlab.3it.usherbrooke.ca/mediawiki-introlab/images/8/87/LabbeAURO2017.pdf),” in _Autonomous Robots_, vol. 42, no. 6, pp. 1133-1150, 2018. ([Springer](http://dx.doi.org/10.1007/s10514-017-9682-5))