arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.09753cs.CV
收藏

基于空谱约束深度图像先验的无监督高光谱混合噪声去除

Unsupervised Hyperspectral Mixed Noise Removal Via Spatial-Spectral Constrained Deep Image Prior

University of Electronic Science and Technology of China(电子科技大学);Southwestern University of Finance and Economics(西南财经大学);Peng Cheng Laboratory(鹏城实验室)

Yi-Si Luo, Xi-Le Zhao, Tai-Xiang Jiang, Yu-Bang Zheng, Yi Chang

摘要:

近年来,基于卷积神经网络(CNN)的方法被提出用于高光谱图像(HSI)去噪。其中,深度图像先验(DIP)等无监督方法备受关注,因为这些方法不需要任何训练数据。然而,DIP遭受半收敛行为,即,DIP的迭代需要通过参考最佳迭代点处的地面实况图像来终止。在本文中,我们提出了空间谱约束的深度图像先验(S2 DIP)的HSI混合噪声去除。具体来说,我们将DIP与空间谱全变分(SSTV)项结合起来,以充分保留HSI的空间谱局部平滑性,并将$\ell_1$ -范数项结合起来,以捕获复杂的稀疏噪声。所提出的S2 DIP联合利用从深度CNN带来的表达能力,而无需任何训练数据,并通过手工制作的先验利用HSI和噪声结构。因此,我们的方法避免了半收敛行为,表现出比DIP更高的稳定性。同时,我们的方法大大提高了DIP的HSI去噪能力。为了解决所提出的去噪模型,我们开发了交替方向乘子法算法。大量的实验表明,所提出的S2 DIP优于基于优化和基于监督CNN的最先进的HSI去噪方法。

英文摘要:

Recently, convolutional neural network (CNN)-based methods are proposed for hyperspectral images (HSIs) denoising. Among them, unsupervised methods such as the deep image prior (DIP) have received much attention because these methods do not require any training data. However, DIP suffers from the semi-convergence behavior, i.e., the iteration of DIP needs to terminate by referring to the ground-truth image at the optimal iteration point. In this paper, we propose the spatial-spectral constrained deep image prior (S2DIP) for HSI mixed noise removal. Specifically, we incorporate DIP with a spatial-spectral total variation (SSTV) term to fully preserve the spatial-spectral local smoothness of the HSI and an $\ell_1$-norm term to capture the complex sparse noise. The proposed S2DIP jointly leverages the expressive power brought from the deep CNN without any training data and exploits the HSI and noise structures via hand-crafted priors. Thus, our method avoids the semi-convergence behavior, showing higher stabilities than DIP. Meanwhile, our method largely enhances the HSI denoising ability of DIP. To tackle the proposed denoising model, we develop an alternating direction multiplier method algorithm. Extensive experiments demonstrate that the proposed S2DIP outperforms optimization-based and supervised CNN-based state-of-the-art HSI denoising methods.

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。

↑