arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2203.09385cs.RO
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DXQ-Net:使用质量感知流的可微分LiDAR-Camera外部校准

DXQ-Net: Differentiable LiDAR-Camera Extrinsic Calibration Using Quality-aware Flow

Zhejiang University(浙江大学);Alibaba Group(阿里巴巴集团)

Xin Jing, Xiaqing Ding, Rong Xiong, Huanjun Deng, Yue Wang

摘要:

激光雷达摄像机的精确外标定是移动机器人多传感器系统的前提。大多数校准方法依赖于费力的手动操作和校准目标。在线工作时,校准方法应该能够从环境中提取信息,以构建跨模态数据关联。卷积神经网络(CNN)具有强大的特征提取能力,已被用于标定。然而,大多数过去的方法解决外部作为一个回归任务,而不考虑所涉及的几何约束。在本文中,我们提出了一种新的端到端的外部校准方法命名为DXQ-Net,使用可微的姿态估计模块进行推广。我们制定了一个概率模型的激光雷达相机校准流程,产生的不确定性的预测来衡量激光雷达相机数据关联的质量。测试实验表明,我们的方法在平移分量上达到了与其他方法相竞争的水平,在旋转分量上达到了最先进的性能。泛化实验表明,该方法的泛化性能明显优于其他基于深度学习的方法。

英文摘要:

Accurate LiDAR-camera extrinsic calibration is a precondition for many multi-sensor systems in mobile robots. Most calibration methods rely on laborious manual operations and calibration targets. While working online, the calibration methods should be able to extract information from the environment to construct the cross-modal data association. Convolutional neural networks (CNNs) have powerful feature extraction ability and have been used for calibration. However, most of the past methods solve the extrinsic as a regression task, without considering the geometric constraints involved. In this paper, we propose a novel end-to-end extrinsic calibration method named DXQ-Net, using a differentiable pose estimation module for generalization. We formulate a probabilistic model for LiDAR-camera calibration flow, yielding a prediction of uncertainty to measure the quality of LiDAR-camera data association. Testing experiments illustrate that our method achieves a competitive with other methods for the translation component and state-of-the-art performance for the rotation component. Generalization experiments illustrate that the generalization performance of our method is significantly better than other deep learning-based methods.

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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