Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6958278 | Signal Processing | 2016 | 15 Pages |
Abstract
The efficient representation of edges is key to improving the image denoising performance. This motivates us to capture the edges and represent them with a sparse description. A novel image denoising method is proposed by exploiting the sparse representation of the edges and the multidirectional shrinkage. The enhancement of the sparsity is achieved by applying directionlet transforms constructed with the directions of the edges. Because the constructed directionlet transforms are performed along different directions, for each pixel we obtain many different estimates, one of which is optimal. The final denoised output is obtained by a weighted averaging of all individual estimates. Experimental results show that our method, compared with other multidirectional wavelet-based denoising algorithms, can effectively remove noise and preserve detail information such as edges and textures while avoiding the border effect.
Related Topics
Physical Sciences and Engineering
Computer Science
Signal Processing
Authors
Jing Liu, Yinghui Wang, Kaijun Su, Wenjuan He,