Multichannel color image denoising based on multiple dictionaries learning
Multichannel color image denoising based on multiple dictionaries learning
复制标题
基于多词典学习的多通道彩色图像去噪
DOI:
10.1117/1.jei.28.2.023002
复制
发表时间:
2019-03
影响因子:
1.1
通讯作者:
Tao Ran
中科院分区:
文献类型:
--
作者:
Zhang Ying;Zhang Feng;Tao Ran
Abstract. Dictionary learning for sparse representation has attracted much attention among researchers in image denoising. However, most dictionary learning-based methods use a single dictionary which has limitation in sparse representation ability. To improve the performance of this methodology, we propose a multichannel color image denoising algorithm based on multiple dictionary learning. Compared with a fixed dictionary, multiple dictionaries have more powerful representation ability. The algorithm first uses a Gaussian mixture model to model the generic patch prior of an external natural color image dataset. Then, the multiple orthogonal dictionaries are initialized with the generic prior by applying singular value decomposition to the covariance matrix of each Gaussian component. The sparse coding coefficients and the multiple dictionaries are alternately updated for better fitting the desired image. Considering the difference of the noise levels in RGB channels, we use a weight matrix to adjust the contributions of different channels for the denoised result. The desired image is estimated based on maximum a posteriori framework. The extensive experiments have demonstrated that our proposed method outperforms some state-of-the-art denoising algorithms in most cases.
登录
查看更多内容
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
通讯作者:
--
影响因子:
1.1
作者:
Shibin Xuan;Yulan Han
通讯作者:
Shibin Xuan;Yulan Han
影响因子:
10.6
作者:
Zhang, Jian;Zhao, Debin;Gao, Wen
通讯作者:
Gao, Wen
影响因子:
1.1
作者:
Shaoping Xu;Xiaoxia Zeng;Yinnan Jiang;Yiling Tang
通讯作者:
Shaoping Xu;Xiaoxia Zeng;Yinnan Jiang;Yiling Tang
DOI:
10.1117/1.2804153
发表时间:
2007-10
期刊:
J. Electronic Imaging
影响因子:
--
作者:
I. Eom;Y. Kim;Do Hoon Lee
通讯作者:
I. Eom;Y. Kim;Do Hoon Lee