arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2312.04044cs.CV
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用于鸟瞰图语义分割的残差图卷积网络

Residual Graph Convolutional Network for Bird's-Eye-View Semantic Segmentation

Utah State University(犹他州立大学)

Qiuxiao Chen, Xiaojun Qi

AI总结:

针对深度CNN和transformer早期层难以获取BEV全局语义关系的问题,本文提出含非重叠图投影、空间/通道图及残差下采样的RGC模块,并在nuScenes上以mIoU超越BEVFusion 3.1%。

摘要:

检索空间信息并理解周围环境的语义信息,对于鸟瞰图(BEV)语义分割十分重要。在自动驾驶应用中,自动驾驶车辆需要感知周围环境以安全行驶。然而,当前的BEV语义分割技术(深度卷积神经网络(CNN)和transformer)难以在网络的早期层获得周围环境的全局语义关系。本文提出在深度CNN中加入一种新颖的残差图卷积(RGC)模块,以在多视图图像域中同时获取全局信息和区域级语义关系。具体而言,RGC模块采用非重叠图空间投影,将完整的BEV信息高效投影到图空间。随后,它构建相互连接的空间图和通道图,以提取每个节点之间的空间信息以及每个节点内部的通道信息(即提取全局特征的上下文关系)。此外,它使用下采样残差过程来增强坐标特征复用,从而保持全局信息。分割数据增强与对齐模块有助于同时增强并对齐BEV特征和真值,在几何上保持它们的对齐,以获得更好的分割结果。我们在nuScenes基准数据集上的实验结果表明,RGC网络在IoU和mIoU方面优于四个最先进网络及其四个变体。所提出的RGC网络比最佳的最先进网络BEVFusion实现了高3.1%的mIoU。代码和模型将公开发布。

英文摘要:

Retrieving spatial information and understanding the semantic information of the surroundings are important for Bird's-Eye-View (BEV) semantic segmentation. In the application of autonomous driving, autonomous vehicles need to be aware of their surroundings to drive safely. However, current BEV semantic segmentation techniques, deep Convolutional Neural Networks (CNNs) and transformers, have difficulties in obtaining the global semantic relationships of the surroundings at the early layers of the network. In this paper, we propose to incorporate a novel Residual Graph Convolutional (RGC) module in deep CNNs to acquire both the global information and the region-level semantic relationship in the multi-view image domain. Specifically, the RGC module employs a non-overlapping graph space projection to efficiently project the complete BEV information into graph space. It then builds interconnected spatial and channel graphs to extract spatial information between each node and channel information within each node (i.e., extract contextual relationships of the global features). Furthermore, it uses a downsample residual process to enhance the coordinate feature reuse to maintain the global information. The segmentation data augmentation and alignment module helps to simultaneously augment and align BEV features and ground truth to geometrically preserve their alignment to achieve better segmentation results. Our experimental results on the nuScenes benchmark dataset demonstrate that the RGC network outperforms four state-of-the-art networks and its four variants in terms of IoU and mIoU. The proposed RGC network achieves a higher mIoU of 3.1% than the best state-of-the-art network, BEVFusion. Code and models will be released.

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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