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arXiv 2101.07589cs.CV
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光谱混叠和非均匀数据集下的高光谱图像超分辨率

Hyperspectral Image Super-Resolution with Spectral Mixup and Heterogeneous Datasets

CVL, ETH Zurich(苏黎世联邦理工学院计算机视觉实验室);PSI, KU Leuven(鲁汶大学PSI实验室)

Ke Li, Dengxin Dai, Ender Konukoglu, Luc Van Gool

摘要:

本文研究了高光谱图像的超分辨率。HSI SR的特征在于高维数据和有限数量的训练样本。这加剧了神经网络的不良行为,例如记忆和对分布外样本的敏感性。这项工作解决了这些问题,有三个贡献。首先,我们观察到HSI SR和RGB图像SR是相关的,并开发了一种新的多任务网络来联合训练它们,以便辅助任务RGB图像SR可以提供额外的监督。其次,我们提出了一个简单,但有效的数据增强例程,称为频谱混合,构建有效的虚拟训练样本,以扩大训练集。最后,我们将网络扩展到半监督设置,以便它可以从仅包含低分辨率HSI的数据集中学习。有了这些贡献,我们的方法能够从异构数据集中学习,并提高了对大量HD HSI训练样本的要求。在四个标准数据集上的大量实验表明,我们的方法明显优于现有方法,并支持我们的贡献的相关性。代码已在https://github.com/kli8996/HSISR上提供。

英文摘要:

This work studies Hyperspectral image (HSI) super-resolution (SR). HSI SR is characterized by high-dimensional data and a limited amount of training examples. This exacerbates the undesirable behaviors of neural networks such as memorization and sensitivity to out-of-distribution samples. This work addresses these issues with three contributions. First, we observe that HSI SR and RGB image SR are correlated and develop a novel multi-tasking network to train them jointly so that the auxiliary task RGB image SR can provide additional supervision. Second, we propose a simple, yet effective data augmentation routine, termed Spectral Mixup, to construct effective virtual training samples to enlarge the training set. Finally, we extend the network to a semi-supervised setting so that it can learn from datasets containing only low-resolution HSIs. With these contributions, our method is able to learn from heterogeneous datasets and lift the requirement for having a large amount of HD HSI training samples. Extensive experiments on four standard datasets show that our method outperforms existing methods significantly and underpin the relevance of our contributions. Code has been made available at https://github.com/kli8996/HSISR.

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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