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徐宏辉, 郑建炜, 秦梦洁, 陈婉君. 结构化矩阵优化的高光谱图像噪声去除算法[J]. 计算机辅助设计与图形学学报, 2021, 33(1): 68-80. DOI: 10.3724/SP.J.1089.2021.18159
引用本文: 徐宏辉, 郑建炜, 秦梦洁, 陈婉君. 结构化矩阵优化的高光谱图像噪声去除算法[J]. 计算机辅助设计与图形学学报, 2021, 33(1): 68-80. DOI: 10.3724/SP.J.1089.2021.18159
Xu Honghui, Zheng Jianwei, Qin Mengjie, Chen Wanjun. Hyperspectral Image Denoising Using Structural Matrix Optimization[J]. Journal of Computer-Aided Design & Computer Graphics, 2021, 33(1): 68-80. DOI: 10.3724/SP.J.1089.2021.18159
Citation: Xu Honghui, Zheng Jianwei, Qin Mengjie, Chen Wanjun. Hyperspectral Image Denoising Using Structural Matrix Optimization[J]. Journal of Computer-Aided Design & Computer Graphics, 2021, 33(1): 68-80. DOI: 10.3724/SP.J.1089.2021.18159

结构化矩阵优化的高光谱图像噪声去除算法

Hyperspectral Image Denoising Using Structural Matrix Optimization

  • 摘要: 受带噪线路或电子感应设备老化等影响,高光谱图像在编码和传输过程中往往会被混合噪声污染,严重影响后续图像检测、分类、跟踪、解卷等应用的性能.为实现有效地去噪,将零化滤波技术扩展至高光谱图像修复中,提出一种结构化矩阵恢复的混合噪声去除算法.首先根据高光谱图像不同波段之间的关联性和局部空间邻域的关滑性,将不同图像子块构建成具有Hankel结构的低秩矩阵;然后考虑Hankel化线性操作并不破坏混合噪声的稀疏状态,将稀疏性约束作为先验条件;最后使用截断核范数和组稀疏范数分别替代低秩和稀疏约束函数,构建双先验条件下的目标模型,并采用交替方向乘子法进行变量优化求解.整体去噪流程通过图像patch分组、子块优化和patch重组3个步骤实现.通过多组行业通用高光谱数据进行实验的结果表明,该算法在视觉效果和定量评价PSNR,SSIM以及SAD上都明显优于现有的高光谱噪声去除算法.

     

    Abstract: Due to various factors,e.g.,thermal electronics,dark current,and stochastic error of photocounting in an imaging process,hyperspectral images(HSI)are inevitably corrupted by different types of noise during the acquisition and transmission process.For effective noise removal,in this paper,we attempt to extend the annihilating filter for the HSI community.Specifically,a new method based on the structural matrix recovery is presented.First,benefiting from the correlation of different spectral bands and the smoothness of local spatial neighborhood,the image patches are hankelized to be a structural low-rank matrix;Then considering that the linear hankelization does not destroy the sparse attribution of the impulse noise,sparsity prior can be employed as a constraint;Finally,by using the truncated nuclear norm and group sparse norm as the surrogates of the original low-rank and sparse function,our final model is formed by two prior conditions and be solved via the well-known ADMM optimization algorithm.The whole image denoising procedure involves three main steps,i.e.,the decomposition of input image into overlapped patches,the block-wise estimates for each patch,and the recovery of the whole image.The experimental results show that our proposed method is superior to other state-of-the-art methods both visually and quantitative indices,such as peak signal to noise ratio(PSNR),structural similarity index measure(SSIM)and spectral angle distance(SAD).

     

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