Fast and Robust Ground Surface Estimation from LIDAR Measurements using Uniform B-Splines

This repository contains the source code, examples and further information regarding our approach of estimating a ground surface from LIDAR Measurements using Uniform B-Splines.

Publication

Titel: Fast and Robust Ground Surface Estimation from LIDAR Measurements using Uniform B-Splines

Authors: Sascha Wirges and Kevin Rösch and Frank Bieder and Christoph Stiller

Abstract: We propose a fast and robust method to estimate the ground surface from LIDAR measurements on an automated vehicle. The ground surface is modeled as a UBS which is robust towards varying measurement densities and with a single parameter controlling the smoothness prior. We model the estimation process as a robust LS optimization problem which can be reformulated as a linear problem and thus solved efficiently. Using the SemanticKITTI data set, we conduct a quantitative evaluation by classifying the point-wise semantic annotations into ground and non-ground points. Finally, we validate the approach on our research vehicle in real-world scenarios.

Citation: If you use this source code, please cite its paper

@inproceedings{wirges2021groundsurfacce,
    title={Fast and Robust Ground Surface Estimation from LIDAR Measurements using Uniform B-Splines},   
    author={Sascha Wirges and Kevin Rösch and Frank Bieder and Christoph Stiller},
    year={2021},
    booktitle = {2021 IEEE 24th International Conference on Information Fusion (FUSION)},
}

Usage

The repository is organized in the following format:

pointcloud_surface/
          ├── include/                  # header files
          ├── res/
                ├── assets/             # images for the github repo
                └── parameters.yaml     # parameter file
          ├── src/                      # source code including all cpp files
          └── test/                     # unit test for the ground surface estimation

Dependencies

The dependencies can be reviewed in the file package.xml and include catkin, mrt_cmake_modules, gtest, libgoogle-glog-dev, libceres-dev, libpcl-all-dev, uniform_bspline_ceres, uniform_bspline_eigen, util_ceres, util_eigen and util_yaml

Run

tbd

Results on our research vehicle

We implemented and validated our approach on our research vehicle BerthaOne

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Example of full 360° scans of all LIDARs on the experimental vehicle and estimated ground surface.

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Example of our combined height map fusing the ground surface height and max observed reflexion height in each grid cell:

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