arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.06676cs.CVcs.LGcs.RO
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UnRectDepthNet:使用通用框架处理常见相机畸变模型的自监督单目深度估计

UnRectDepthNet: Self-Supervised Monocular Depth Estimation using a Generic Framework for Handling Common Camera Distortion Models

Valeo DAR(法雷奥驾驶辅助研究中心);Spleenlab GmbH(Spleenlab有限公司);Technische Universität Ilmenau(伊尔梅瑙工业大学);Valeo Vision Systems(法雷奥视觉系统公司)

Varun Ravi Kumar, Senthil Yogamani, Markus Bach, Christian Witt, Stefan Milz, Patrick Mader

AI总结:

本文提出UnRectDepthNet自监督框架,直接从未校正单目视频估计深度、距离和里程计,通过隐式学习相机畸变避免校正副作用,并在KITTI与190°鱼眼数据上达到先进性能。

摘要:

在经典计算机视觉中,校正是多视图深度估计不可或缺的一部分。它通常包括极线校正和镜头畸变校正。该过程显著简化了深度估计,因此已被CNN方法采用。然而,校正存在若干副作用,包括视场(FOV)减小、重采样畸变以及对校准误差的敏感性。在畸变显著的情况下(例如广角鱼眼相机),这些影响尤为明显。本文提出一种通用的尺度感知自监督流水线,用于从未校正的单目视频中估计深度、欧氏距离和视觉里程计。我们在带有桶形畸变的未校正KITTI数据集上展示了与已校正KITTI数据集相当的精度水平。其直觉是,校正步骤可以被隐式吸收到CNN模型中,模型在不增加复杂度的情况下学习畸变模型。我们的方法不会受到视场减小的影响,并避免了推理时校正的计算成本。为进一步说明所提框架的普遍适用性,我们将其应用于具有190°水平视场的广角鱼眼相机。训练框架UnRectDepthNet将相机畸变模型作为参数,并相应地调整投影和反投影函数。所提算法在KITTI已校正数据集上得到进一步评估,我们取得了优于先前工作FisheyeDistanceNet的最先进结果。畸变测试场景视频序列上的定性结果表明其性能优异:https://youtu.be/K6pbx3bU4Ss。

英文摘要:

In classical computer vision, rectification is an integral part of multi-view depth estimation. It typically includes epipolar rectification and lens distortion correction. This process simplifies the depth estimation significantly, and thus it has been adopted in CNN approaches. However, rectification has several side effects, including a reduced field of view (FOV), resampling distortion, and sensitivity to calibration errors. The effects are particularly pronounced in case of significant distortion (e.g., wide-angle fisheye cameras). In this paper, we propose a generic scale-aware self-supervised pipeline for estimating depth, euclidean distance, and visual odometry from unrectified monocular videos. We demonstrate a similar level of precision on the unrectified KITTI dataset with barrel distortion comparable to the rectified KITTI dataset. The intuition being that the rectification step can be implicitly absorbed within the CNN model, which learns the distortion model without increasing complexity. Our approach does not suffer from a reduced field of view and avoids computational costs for rectification at inference time. To further illustrate the general applicability of the proposed framework, we apply it to wide-angle fisheye cameras with 190$^\circ$ horizontal field of view. The training framework UnRectDepthNet takes in the camera distortion model as an argument and adapts projection and unprojection functions accordingly. The proposed algorithm is evaluated further on the KITTI rectified dataset, and we achieve state-of-the-art results that improve upon our previous work FisheyeDistanceNet. Qualitative results on a distorted test scene video sequence indicate excellent performance https://youtu.be/K6pbx3bU4Ss.

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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