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基于NSCT阈值萎缩法的遥感图像去噪 被引量:6

Remote Sensing Image Denoising Based on NSCT Threshold Shrinkage Approach
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摘要 针对图像去噪过程中产生的伪吉布斯现象以及峰值信噪比(PSNR)较低等问题,提出一种基于非下采样Contourlet变换(NSCT)阈值萎缩法的遥感图像去噪算法。根据NeighShrink去噪算法中尺度内系数的邻域系数相关性,以及BiShink去噪算法中不同尺度间系数的相关性,对图像进行去噪,利用NSCT的平移不变性,抑制小波去噪中的伪吉布斯现象。实验结果证明,采用该算法去噪后的图像PSNR较高,视觉效果较优。 In order to suppress pseudo-Gibbs phenomenon,improve Peak Signal to Noise Ratio(PSNR) in the process of image denoising,this paper proposes a remote sensing image denoising algorithm based on Nonsubsampled Contourlet Transform(NSCT) threshold shrinkage approach.It uses the correlation intra-scale in NeighShrink denoising algorithm and the correlation among scale in BiShink denoising algorithm to deal with the noise image.By using the shift invariance of NSCT,it suppresses the pseudo-Gibbs phenomenon.Experimental results show that the proposed algorithm gets better results than other methods mentioned in the area of PSNR and visual effect.
出处 《计算机工程》 CAS CSCD 2012年第5期227-229,共3页 Computer Engineering
基金 科技部国际科技合作基金资助项目(2009DFA12870) 教育部促进与美大地区科研合作与高层次人才培养基金资助项目(2010-1595)
关键词 遥感图像 图像去噪 非下采样CONTOURLET变换 平移不变性 NeighShrink阈值 BiShrink阈值 remote sensing image image denoising Nonsubsampled Contourlet Transform(NSCT) shift invariance NeighShrink threshold BiShrink threshold
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共引文献108

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