arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.01627cs.RO
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无目标环境下高分辨率LiDAR和摄像机的像素级外自标定

Pixel-level Extrinsic Self Calibration of High Resolution LiDAR and Camera in Targetless Environments

The University of Hong Kong(香港大学);Southern University of Science and Technology(南方科技大学)

Chongjian Yuan, Xiyuan Liu, Xiaoping Hong, Fu Zhang

摘要:

在这封信中,我们提出了一种新的方法,在无目标环境中的高分辨率激光雷达和RGB相机的自动外部校准。我们的方法不需要棋盘格,但可以通过对齐两个传感器中的自然边缘特征来实现像素级的精度。在理论层面上,我们分析了边缘特征的约束条件和标定精度对场景边缘分布的敏感性。在实现层面上,深入研究了LiDAR的物理测量原理,提出了一种基于点云体素切割和平面拟合的LiDAR边缘提取方法。由于自然场景中边缘的丰富性,我们在许多室内和室外场景中进行了实验。结果表明,该方法具有较高的鲁棒性、准确性和一致性。这对激光雷达与相机融合技术的研究和应用具有一定的促进作用。我们在GitHub上开源了我们的代码,以造福社区。

英文摘要:

In this letter, we present a novel method for automatic extrinsic calibration of high-resolution LiDARs and RGB cameras in targetless environments. Our approach does not require checkerboards but can achieve pixel-level accuracy by aligning natural edge features in the two sensors. On the theory level, we analyze the constraints imposed by edge features and the sensitivity of calibration accuracy with respect to edge distribution in the scene. On the implementation level, we carefully investigate the physical measuring principles of LiDARs and propose an efficient and accurate LiDAR edge extraction method based on point cloud voxel cutting and plane fitting. Due to the edges' richness in natural scenes, we have carried out experiments in many indoor and outdoor scenes. The results show that this method has high robustness, accuracy, and consistency. It can promote the research and application of the fusion between LiDAR and camera. We have open-sourced our code on GitHub to benefit the community.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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