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rtabmap_ros [![Build Status](https://travis-ci.org/introlab/rtabmap_ros.svg?branch=master)](https://travis-ci.org/introlab/rtabmap_ros)
===========
RTAB-Map's ROS package.
For more information, demos and tutorials about this package, visit [rtabmap_ros](http://wiki.ros.org/rtabmap_ros) page on ROS wiki.
For the RTAB-Map libraries and standalone application, visit [RTAB-Map's home page](http://introlab.github.io/rtabmap) or [RTAB-Map's wiki](https://github.com/introlab/rtabmap/wiki).
# Installation
## ROS2 distribution
**Under construction**: see [ros2 branch](https://github.com/introlab/rtabmap_ros/tree/ros2#rtabmap_ros).
## ROS distribution
RTAB-Map is released as binaries in the ROS distribution.
* Melodic
```
$ sudo apt-get install ros-melodic-rtabmap-ros
```
* Lunar
```
$ sudo apt-get install ros-lunar-rtabmap-ros
```
* Kinetic
```
$ sudo apt-get install ros-kinetic-rtabmap-ros
```
* Jade
```
$ sudo apt-get install ros-jade-rtabmap-ros
```
* Indigo
```
$ sudo apt-get install ros-indigo-rtabmap-ros
```
* For armhf architecture, `ros-indigo-rtabmap-ros` is not available. Install `ros-indigo-rtabmap` and build from source `rtabmap_ros` using the `indigo-devel` branch.
```
$ cd catkin_ws
$ git clone -b indigo-devel https://github.com/introlab/rtabmap_ros.git src/rtabmap_ros
$ catkin_make -j1
```
* Hydro:
```
$ sudo apt-get install ros-hydro-rtabmap-ros
```
* Note that rtabmap_ros Hydro binaries are stuck at version 0.8.12. To use the latest version, see [Build from source](https://github.com/introlab/rtabmap_ros#build-from-source) below.
When launching `rtabmap_ros`'s nodes, if you have the error `error while loading shared libraries...`, add the next line at the end of your `~/.bashrc` to fix it:
```bash
$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/ros/melodic/lib/x86_64-linux-gnu
```
### Docker
* Go to [docker](https://github.com/introlab/rtabmap_ros/tree/master/docker) directory for an example.
## Build from source
This section shows how to install RTAB-Map ros-pkg on **ROS Hydro/Indigo/Jade/Kinetic/Lunar/Melodic** (Catkin build). RTAB-Map works only with the PCL >=1.7, which is the default version installed with ROS Hydro/Indigo/Jade/Kinetic/Lunar/Melodic (**Fuerte and Groovy are not supported**).
* The next instructions assume that you have set up your ROS workspace using this [tutorial](http://wiki.ros.org/catkin/Tutorials/create_a_workspace). I will use melodic prefix for convenience, but it should work with Hydro, Indigo, Jade, Kinetic and Lunar. The workspace path is `~/catkin_ws` and your `~/.bashrc` contains:
```bash
$ source /opt/ros/melodic/setup.bash
$ source ~/catkin_ws/devel/setup.bash
```
0. Required dependencies
* The easiest way to get all them (Qt, PCL, VTK, OpenCV, ...) is to install/uninstall rtabmap binaries:
```bash
$ sudo apt-get install ros-melodic-rtabmap ros-melodic-rtabmap-ros
$ sudo apt-get remove ros-melodic-rtabmap ros-melodic-rtabmap-ros
```
1. Optional dependencies
* If you want SURF/SIFT on Indigo/Jade (Hydro has already SIFT/SURF), you have to build [OpenCV]([OpenCV](http://opencv.org/)) from source to have access to *nonfree* module. Install it in `/usr/local` (default) and the rtabmap library should link with it instead of the one installed in ROS.
* On Indigo/Jade, I recommend to use latest 2.4 version ([2.4.11](https://github.com/Itseez/opencv/archive/2.4.11.zip)) and build it from source following these [instructions](http://docs.opencv.org/doc/tutorials/introduction/linux_install/linux_install.html#building-opencv-from-source-using-cmake-using-the-command-line). RTAB-Map can build with OpenCV3+[xfeatures2d](https://github.com/Itseez/opencv_contrib/tree/master/modules/xfeatures2d) module, but rtabmap_ros package will have libraries conflict as cv-bridge is depending on OpenCV2. If you want OpenCV3, you should build ros [vision-opencv](https://github.com/ros-perception/vision_opencv) package yourself (and all ros packages depending on it) so it can link on OpenCV3.
* On Kinetic/Lunar/Melodic, I recommend to use OpenCV3+[xfeatures2d](https://github.com/Itseez/opencv_contrib/tree/master/modules/xfeatures2d) module already installed by ROS. You can also install OpenCV2, but rtabmap_ros package will have libraries conflict as cv-bridge is depending on OpenCV3. Thus if you want OpenCV2 on Kinetic/Lunar/Melodic, you should build ros [vision-opencv](https://github.com/ros-perception/vision_opencv) package yourself (and all ros packages depending on it) so it can link on OpenCV2.
* g2o: Use directly the binaries `ros-melodic-libg2o`. However, [this g2o version](https://github.com/felixendres/g2o/tree/c++03) (c++03 branch) built from source may be faster than the binaries (install `libsuitesparse-dev` before building `g2o`) and would be [required to avoid some crashes](http://official-rtab-map-forum.67519.x6.nabble.com/ROS-2D-occupancy-grid-tp1204p1215.html). To build RTAB-Map against [latest official g2o version](https://github.com/RainerKuemmerle/g2o) built from source, g2o should be built with `-DBUILD_WITH_MARCH_NATIVE=OFF` to avoid some segmentation faults caused by Eigen.
* [GTSAM](https://collab.cc.gatech.edu/borg/gtsam): Follow installation instructions from [here](https://collab.cc.gatech.edu/borg/gtsam/#quickstart). RTAB-Map needs latest version from source, it will **not build** with 3.2.1. Set cmake variable `GTSAM_USE_SYSTEM_EIGEN=ON` to make sure the same Eigen version is used across all dependencies to avoid crashes.
```bash
git clone https://bitbucket.org/gtborg/gtsam.git
```
2. Install RTAB-Map standalone libraries. Add `-DCMAKE_INSTALL_PREFIX=~/catkin_ws/devel` to `cmake` command below if you want to install in your Catkin's devel folder without `sudo`. **Do not clone in your Catkin workspace**.
```bash
$ cd ~
$ git clone https://github.com/introlab/rtabmap.git rtabmap
$ cd rtabmap/build
$ cmake .. [<---double dots included]
$ make
$ sudo make install
```
3. Install RTAB-Map ros-pkg in your src folder of your Catkin workspace.
```bash
$ cd ~/catkin_ws
$ git clone https://github.com/introlab/rtabmap_ros.git src/rtabmap_ros
$ catkin_make -j1
```
* Use `catkin_make -j1` if compilation requires more RAM than you have (e.g., some files require up to ~1.8 GB to build).
## Build from source for Nvidia Jetson
These instructions are for Jetpack 3 (Ubuntu 16.04 with ROS Kinetic). For **Jetpack 4** (Ubuntu 18.04 with ROS Melodic), see this [post](https://github.com/introlab/rtabmap/issues/427#issuecomment-608052821).
To use `rtabmap_ros` on Jetson, you can follow the instructions above if you don't care if OpenCV is built for Tegra. However, if you want `rtabmap` to use OpenCV 4 Tegra, we must re-build [vision_opencv](https://github.com/ros-perception/vision_opencv) stack from source too to avoid conflicts with [vision_opencv](https://github.com/ros-perception/vision_opencv) stack binaries from ros (which are linked on a not optimized version of OpenCV). Here are the steps:
1. Install [JetPack](https://developer.nvidia.com/embedded/jetpack) with OpenCV on the Jetson.
2. Do steps 1.2 and 1.3 from http://wiki.ros.org/kinetic/Installation/Ubuntu
3. Install non-opencv dependent ros packages:
* Jetpack 3: `sudo apt-get install ros-kinetic-ros-base ros-kinetic-image-transport ros-kinetic-tf ros-kinetic-tf-conversions ros-kinetic-eigen-conversions ros-kinetic-laser-geometry ros-kinetic-pcl-conversions ros-kinetic-pcl-ros ros-kinetic-move-base-msgs ros-kinetic-rviz ros-kinetic-octomap-ros ros-kinetic-move-base libhdf5-openmpi-dev libsuitesparse-dev`
4. Do step 1.6 from http://wiki.ros.org/kinetic/Installation/Ubuntu
5. [Create your catkin workspace](http://wiki.ros.org/ROS/Tutorials/InstallingandConfiguringROSEnvironment#Create_a_ROS_Workspace)
6. *Optional:* Install g2o and/or GTSAM dependencies as above (increase visual odometry and graph optimization accuracy).
7. To avoid [libGL undefined errors](https://devtalk.nvidia.com/default/topic/1007290/jetson-tx2/building-opencv-with-opengl-support-/post/5141945/#5141945):
```
$ cd /usr/lib/aarch64-linux-gnu/
# Jetpack 3:
$ sudo ln -sf tegra/libGL.so libGL.so
# Jetpack 4:
sudo ln -sf libGL.so.1.0.0 libGL.so
```
8. To avoid [libvtkproj4 errors](https://github.com/PointCloudLibrary/pcl/issues/1594#issuecomment-283873617):
```
$ sudo ln -s /usr/lib/aarch64-linux-gnu/libvtkCommonCore-6.2.so /usr/lib/libvtkproj4.so
$ sudo ln -s /usr/lib/aarch64-linux-gnu/libvtkCommonCore-6.2.so /usr/lib/aarch64-linux-gnu/libvtkproj4-6.2.so.6.2.0
```
9. Install RTAB-Map standalone libraries. Add `-DCMAKE_INSTALL_PREFIX=~/catkin_ws/devel` to `cmake` command below if you want to install in your Catkin's devel folder without `sudo`. **Do not clone in your Catkin workspace**.
```bash
$ cd ~
$ git clone https://github.com/introlab/rtabmap.git rtabmap
$ cd rtabmap/build
$ cmake .. [<---double dots included]
$ make
$ sudo make install
```
10. Clone [vision_opencv](https://github.com/ros-perception/vision_opencv), [image_transport_plugins](https://github.com/ros-perception/image_transport_plugins) and `rtabmap_ros` packages in your catkin_ws:
```bash
$ cd ~/catkin_ws
$ git clone https://github.com/ros-perception/vision_opencv src/vision_opencv
$ git clone https://github.com/ros-perception/image_transport_plugins.git src/image_transport_plugins
$ git clone https://github.com/introlab/rtabmap_ros.git src/rtabmap_ros
$ catkin_make -j2
```
### Update to new version
```bash
###########
# rtabmap
###########
$ cd rtabmap
$ git pull origin master
$ cd build
$ make
$ make install
# Do "sudo make install" if you installed rtabmap in "/usr/local"
###########
# rtabmap_ros
###########
$ roscd rtabmap_ros
$ git pull origin master
$ roscd
$ cd ..
$ catkin_make -j1 --pkg rtabmap_ros
```
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