Visual Motion Estimation and Terrain Modeling for Planetary Rovers
The next round of planetary missions will require increased autonomy to enable exploration rovers to travel
great distances with limited aid from a human operator. For autonomous operations at this scale, localization
and terrain modeling become key aspects of onboard rover functionality. Previous Mars rover missions have
relied on odometric sensors such as wheel encoders and inertial measurement units/gyros for on-board motion
estimation. While these offer a simple solution, they are prone to wheel-slip in loose soil and drift of
biases, respectively. Alternatively, the use of visual landmarks observed by stereo cameras to localize a
rover offers a more robust solution but at the cost of increased complexity. Additionally rovers will need to
create photo-realistic three-dimensional models of visited sites for autonomous operations on-site and mission
planning on Earth.