arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.10322cs.CVcs.AI
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AF $_2$:用于航空影像分割的自适应聚焦框架

AF$_2$: Adaptive Focus Framework for Aerial Imagery Segmentation

Lin Huang, Qiyuan Dong, Lijun Wu, Jia Zhang, Jiang Bian, Tie-Yan Liu

摘要:

航空影像分割作为一种特殊的语义分割任务,在高空间分辨率遥感影像理解中得到了广泛的应用。航空影像分割除了面临一般语义分割任务所面临的大尺度变化等问题外,还面临着一些独特的挑战,其中最关键的挑战在于前景-背景不平衡。最近已经有一些尝试通过提出复杂的神经网络架构来解决这个问题的努力,因为它们可以用于提取信息丰富的多尺度特征表示并增加对象边界的区分。然而,他们中的许多人只是利用这些多尺度表示在特设的措施,但忽略了一个事实,即不同大小的对象的语义可以更好地识别通过不同范围的感受野。在本文中,我们提出了自适应焦点框架(AF $_2$),它采用了分层分割过程,并侧重于自适应地利用广泛采用的神经网络架构产生的多尺度表示。特别是,一个可学习的模块,称为自适应置信度机制(ACM),提出了确定表示的规模应用于分割不同的对象。综合实验表明,AF $_2$在三种广泛使用的航空基准上的精度有了显著提高,与主流方法一样快。

英文摘要:

As a specific semantic segmentation task, aerial imagery segmentation has been widely employed in high spatial resolution (HSR) remote sensing images understanding. Besides common issues (e.g. large scale variation) faced by general semantic segmentation tasks, aerial imagery segmentation has some unique challenges, the most critical one among which lies in foreground-background imbalance. There have been some recent efforts that attempt to address this issue by proposing sophisticated neural network architectures, since they can be used to extract informative multi-scale feature representations and increase the discrimination of object boundaries. Nevertheless, many of them merely utilize those multi-scale representations in ad-hoc measures but disregard the fact that the semantic meaning of objects with various sizes could be better identified via receptive fields of diverse ranges. In this paper, we propose Adaptive Focus Framework (AF$_2$), which adopts a hierarchical segmentation procedure and focuses on adaptively utilizing multi-scale representations generated by widely adopted neural network architectures. Particularly, a learnable module, called Adaptive Confidence Mechanism (ACM), is proposed to determine which scale of representation should be used for the segmentation of different objects. Comprehensive experiments show that AF$_2$ has significantly improved the accuracy on three widely used aerial benchmarks, as fast as the mainstream method.

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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