Image de-noising algorithm using adaptive threshold based on nonsubsampled Contourlet transform

doi:10.3778/j.issn.1002-8331.2010.10.050

Computer Engineering and Applications ›› 2010, Vol. 46 ›› Issue (10): 157-159.DOI: 10.3778/j.issn.1002-8331.2010.10.050

• 图形、图像、模式识别 • Previous Articles Next Articles

Image de-noising algorithm using adaptive threshold based on nonsubsampled Contourlet transform

ZENG Ye-zhan，QIAN Sheng-you，LIU Chang，WANG Qi-xue，DING Ya-jun

College of Physics and Information Science，Hunan Normal University，Changsha 410081，China

Received:2008-09-24 Revised:2008-12-16 Online:2010-04-01 Published:2010-04-01
Contact: ZENG Ye-zhan

非下采样Contourlet变换自适应图像去噪方法

曾业战，钱盛友，刘畅，王岐学，丁亚军

湖南师范大学物理与信息科学学院，长沙 410081

通讯作者: 曾业战

Abstract

Abstract: A new adaptive method of image de-noising based on NonSubsampled Contourlet Transform（NSCT） is presented.Firstly，the noisy image is decomposed into a set of multiscale and multidirectional frequency subbands by NSCT，and then the threshold is adapted automatically according to the energy of subband coefficients.Compared with the multi-scale threshold using contourlet transform and using adaptive threshold based on contourlet transform，the simulation results show that the performance of this method is superior in PSNR，meanwhile it can maintain the image edge and reduce the Gibbs phenomena.

Key words: image de-noising, nonsubsampled Contourlet transform, threshold

摘要： 提出了一种基于非下采样Contourlet变换的自适应图像去噪方法。首先对噪声图像进行非下采样Contourlet变换，得到各个尺度各个方向子带的系数，再根据该系数的能量自适应地调整去噪阈值。实验表明，与Contourlet多尺度阈值去噪、Contourlet自适应阈值去噪相比，该方法在保留图像边缘细节的同时，能提高图像的PSNR值，减少了Gibbs现象。

关键词: 图像去噪, 非下采样Contourlet变换, 阈值

CLC Number:

TP391

ZENG Ye-zhan，QIAN Sheng-you，LIU Chang，WANG Qi-xue，DING Ya-jun . Image de-noising algorithm using adaptive threshold based on nonsubsampled Contourlet transform[J]. Computer Engineering and Applications, 2010, 46(10): 157-159.

曾业战，钱盛友，刘畅，王岐学，丁亚军. 非下采样Contourlet变换自适应图像去噪方法[J]. 计算机工程与应用, 2010, 46(10): 157-159.

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Image de-noising algorithm using adaptive threshold based on nonsubsampled Contourlet transform

非下采样Contourlet变换自适应图像去噪方法

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