arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2205.08780cs.CV
收藏

自动驾驶中基于视觉注意的几何先验自监督绝对深度估计

Visual Attention-based Self-supervised Absolute Depth Estimation using Geometric Priors in Autonomous Driving

Institute of Microelectronics, Chinese Academy of Sciences(中国科学院微电子研究所);University of Chinese Academy of Sciences(中国科学院大学)

Jie Xiang, Yun Wang, Lifeng An, Haiyang Liu, Zijun Wang, Jian Liu

摘要:

虽然现有的单目深度估计方法已经取得了很大的进展,但由于网络建模能力有限和尺度模糊问题,从单个图像预测精确的绝对深度图仍然具有挑战性。在本文中,我们介绍了一个完全基于视觉注意力的深度(VADepth)网络,其中空间注意力和通道注意力应用于所有阶段。VADepth网络通过在长距离上沿空间和通道维度连续提取特征的依赖关系,可以有效地保留重要细节并抑制干扰特征,以更好地感知场景结构,从而获得更准确的深度估计。此外,我们利用几何先验知识来形成尺度约束,以进行尺度感知模型训练。具体来说,我们构建了一个新的规模意识的损失使用相机和平面之间的距离拟合地面点对应的像素的矩形区域中的图像的底部中间。在KITTI数据集上的实验结果表明,该结构达到了最先进的性能,我们的方法可以直接输出绝对深度,而无需后处理。此外,我们在SeasonDepth数据集上的实验也证明了我们的模型对多种未知环境的鲁棒性。

英文摘要:

Although existing monocular depth estimation methods have made great progress, predicting an accurate absolute depth map from a single image is still challenging due to the limited modeling capacity of networks and the scale ambiguity issue. In this paper, we introduce a fully Visual Attention-based Depth (VADepth) network, where spatial attention and channel attention are applied to all stages. By continuously extracting the dependencies of features along the spatial and channel dimensions over a long distance, VADepth network can effectively preserve important details and suppress interfering features to better perceive the scene structure for more accurate depth estimates. In addition, we utilize geometric priors to form scale constraints for scale-aware model training. Specifically, we construct a novel scale-aware loss using the distance between the camera and a plane fitted by the ground points corresponding to the pixels of the rectangular area in the bottom middle of the image. Experimental results on the KITTI dataset show that this architecture achieves the state-of-the-art performance and our method can directly output absolute depth without post-processing. Moreover, our experiments on the SeasonDepth dataset also demonstrate the robustness of our model to multiple unseen environments.

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。

↑