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)