This repository is a hard-fork of https://github.com/ethz-asl/rovio to integrate it with maplab and provide localization and map-building capabilities.

README

This repository contains the ROVIO (Robust Visual Inertial Odometry) framework. The code is open-source (BSD License). Please remember that it is strongly coupled to on-going research and thus some parts are not fully mature yet. Furthermore, the code will also be subject to changes in the future which could include greater re-factoring of some parts.

Author: Michael Bloesch

Video: https://youtu.be/ZMAISVy-6ao

Papers:

• http://dx.doi.org/10.3929/ethz-a-010566547 (IROS 2015)
• http://dx.doi.org/10.1177/0278364917728574 (IJRR 2017)

Please also have a look at the wiki: https://github.com/ethz-asl/rovio/wiki

Install without opengl scene

Dependencies:

• ros
• kindr (https://github.com/ethz-asl/kindr)
• lightweight_filtering (as submodule, use "git submodule update --init --recursive")

#!command

catkin build rovio --cmake-args -DCMAKE_BUILD_TYPE=Release

Install with opengl scene

Additional dependencies: opengl, glut, glew (sudo apt-get install freeglut3-dev, sudo apt-get install libglew-dev)

#!command

catkin build rovio --cmake-args -DCMAKE_BUILD_TYPE=Release -DMAKE_SCENE=ON

Euroc Datasets

The rovio_node.launch file loads parameters such that ROVIO runs properly on the Euroc datasets. The datasets are available under: http://projects.asl.ethz.ch/datasets/doku.php?id=kmavvisualinertialdatasets

Further notes

• Camera matrix and distortion parameters should be provided by a yaml file or loaded through rosparam
• The cfg/rovio.info provides most parameters for rovio. The camera extrinsics qCM (quaternion from IMU to camera frame, Hamilton-convention) and MrMC (Translation between IMU and Camera expressed in the IMU frame) should also be set there. They are being estimated during runtime so only a rough guess should be sufficient.
• Especially for application with little motion fixing the IMU-camera extrinsics can be beneficial. This can be done by setting the parameter doVECalibration to false. Please be carefull that the overall robustness and accuracy can be very sensitive to bad extrinsic calibrations.