arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.01530cs.CV
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基于注意力分层多模态融合的高分辨率深度图成像

High-resolution Depth Maps Imaging via Attention-based Hierarchical Multi-modal Fusion

Harbin Institute of Technology(哈尔滨工业大学);Peng Cheng Laboratory(鹏城实验室);Taobao (China) Software Co.,Ltd.(淘宝(中国)软件有限公司);Tsinghua University(清华大学)

Zhiwei Zhong, Xianming Liu, Junjun Jiang, Debin Zhao, Zhiwen Chen, Xiangyang Ji

摘要:

深度图记录了视点与场景中物体之间的距离,在许多实际应用中起着至关重要的作用。然而,由消费级RGB-D相机捕获的深度图遭受低空间分辨率。引导深度图超分辨率(DSR)是解决这个问题的流行方法,其尝试从输入的低分辨率(LR)深度及其耦合的HR RGB图像(用作引导)恢复高分辨率(HR)深度图。如何正确地选择一致结构并传播它们,以及如何正确地处理不一致结构,是引导DSR最具挑战性的问题。在本文中,我们提出了一种新的基于注意力的层次多模态融合(AHMF)网络引导DSR。具体来说,为了有效地从LR深度和HR指导中提取和组合相关信息,我们提出了一种用于分层卷积层的基于多模态注意力的融合(MMAF)策略,包括一个用于选择有价值特征的特征增强块和一个用于统一具有不同外观特征的模态的相似性度量的特征重新校准块。此外,我们提出了一个双向的层次特征协作(BHFC)模块,充分利用低层次的空间信息和多尺度特征之间的高层结构信息。实验结果表明,我们的方法优于国家的最先进的方法在重建精度,运行速度和内存效率。

英文摘要:

Depth map records distance between the viewpoint and objects in the scene, which plays a critical role in many real-world applications. However, depth map captured by consumer-grade RGB-D cameras suffers from low spatial resolution. Guided depth map super-resolution (DSR) is a popular approach to address this problem, which attempts to restore a high-resolution (HR) depth map from the input low-resolution (LR) depth and its coupled HR RGB image that serves as the guidance. The most challenging problems for guided DSR are how to correctly select consistent structures and propagate them, and properly handle inconsistent ones. In this paper, we propose a novel attention-based hierarchical multi-modal fusion (AHMF) network for guided DSR. Specifically, to effectively extract and combine relevant information from LR depth and HR guidance, we propose a multi-modal attention based fusion (MMAF) strategy for hierarchical convolutional layers, including a feature enhance block to select valuable features and a feature recalibration block to unify the similarity metrics of modalities with different appearance characteristics. Furthermore, we propose a bi-directional hierarchical feature collaboration (BHFC) module to fully leverage low-level spatial information and high-level structure information among multi-scale features. Experimental results show that our approach outperforms state-of-the-art methods in terms of reconstruction accuracy, running speed and memory efficiency.

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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