计算机科学 ›› 2021, Vol. 48 ›› Issue (8): 125-133.doi: 10.11896/jsjkx.200400143
陶星朋, 徐宏辉, 郑建炜, 陈婉君
TAO Xing-peng, XU Hong-hui, ZHENG Jian-wei, CHEN Wan-jun
摘要: 高光谱图像在采集过程中经常受到混合噪声的干扰,严重影响了图像后续应用的性能,因此图像去噪已成为一个极其重要的预处理过程。文中采用非凸正则项代替传统的核范数重新构造逼近问题,使稀疏正则项更贴近本质秩函数的属性,进而提出了一种将非凸代理函数、全变分正则项和l2,1范数集成于统一框架的混合噪声去除算法。所提算法旨在将退化的高光谱图像以矩阵的形式分解为低秩分量和稀疏项,并利用全变分正则化保持边缘信息,提高了高光谱图像的空间分段平滑性。最后利用非凸代理函数的特殊性质,采用一种基于增广拉格朗日乘子法的迭代算法进行变量优化求解。通过多组实验进行验证,结果表明所提算法不仅能有效地去除混合噪声,而且能较好地保持图像的结构和细节,与现有的其他高光谱去噪方法相比,其在视觉效果和定量评价结果上都明显提升。
中图分类号:
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