Exploiting Frequency Correlation for Hyperspectral Image Reconstruction

Muge Yan; Lizhi Wang; Lin Zhu; Hua Huang

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arXiv · 2406.00683

Exploiting Frequency Correlation for Hyperspectral Image Reconstruction

Muge Yan·Lizhi Wang·Lin Zhu·Hua Huang

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Abstract

Deep priors have emerged as potent methods in hyperspectral image (HSI) reconstruction. While most methods emphasize space-domain learning using image space priors like non-local similarity, frequency-domain learning using image frequency priors remains neglected, limiting the reconstruction capability of networks. In this paper, we first propose a Hyperspectral Frequency Correlation (HFC) prior rooted in in-depth statistical frequency analyses of existent HSI datasets. Leveraging the HFC prior, we subsequently establish the frequency domain learning composed of a Spectral-wise self-Attention of Frequency (SAF) and a Spectral-spatial Interaction of Frequency (SIF) targeting low-frequency and high-frequency components, respectively. The outputs of SAF and SIF are adaptively merged by a learnable gating filter, thus achieving a thorough exploitation of image frequency priors. Integrating the frequency domain learning and the existing space domain learning, we finally develop the Correlation-driven Mixing Domains Transformer (CMDT) for HSI reconstruction. Extensive experiments highlight that our method surpasses various state-of-the-art (SOTA) methods in reconstruction quality and computational efficiency.

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Muge Yan, Lizhi Wang, Lin Zhu, Hua Huang. 2024-06-02. Exploiting Frequency Correlation for Hyperspectral Image Reconstruction. https://arxiv.org/abs/2406.00683

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