@article{estimatingthedirectionandradiusofpipe, title = {Estimating the Direction and Radius of Pipe from GPR Image by Ellipse Inversion Model}, author = {Xiren Zhou and Qiuju Chen and Shengfei Lyu and Huanhuan Chen}, year = {2022}, eprint = {2201.10184}, archivePrefix = {arXiv}, url = {https://arxiv.org/abs/2201.10184v1}, }