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高光谱图像光谱域噪声去除的经验模态分解方法

Keywords: 高光谱,光谱域,经验模态分解,二阶导数

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Abstract:

针对高光谱图像存在的光谱域噪声提出了基于经验模态分解的光谱域滤波方法(empiricalmodedecompositionbasedfilter(EMDF)).首先基于光谱曲线二阶导数给出了光谱曲线噪声大小的判定,然后用EMDF方法进行逐像元滤波.在容易引入空间域噪声的光谱区间,以基于光谱导数的Savitzky-Golay滤波方法(derivativebasedsavitzky-Golayfilter(DSGF))进行替代,这样既抑制了空间域噪声的产生,也取得了较好的光谱域滤波效果.

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