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| 基于非抽样复轮廓波变换的图像去噪算法研究 | |
| 引用本文： | 王咏胜,付永庆. 基于非抽样复轮廓波变换的图像去噪算法研究[J]. 光电子．激光, 2009, 0(8) |
| 作者姓名： | 王咏胜 付永庆 |
| 作者单位： | 哈尔滨工程大学信息与通信工程学院; |
| 基金项目： | 国家自然科学基金资助项目(60772025);;水下智能机器人技术国防科技重点实验室基金资助项目(200736) |
| 摘 要： | 将二维双树复小波变换(DT-CWT)与非抽样方向滤波器组(NSDFB)相结合,构造一种新的非抽样复轮廓波变换(NSCCT),并对其平移不变性作了相应证明。同时利用对称的正态逆高斯(NIG)分布先验概率模型和贝叶斯最小均方算法,提出一种基于NSCCT的图像去噪算法。实验结果表明,本文构造的NSCCT能够有效地抑制伪Gibbs现象,并且具有更丰富的方向分量,因而在图像的细节和纹理表现方面有一定的优势。 |
| 关 键 词： | 图像去噪 轮廓波变换（CT） 非抽样复轮廓波变换（NSCCT） |
Study of image denoising based on nonsubsampled complex contourlet transform |
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| WANG Yong-sheng,FU Yong-qing. Study of image denoising based on nonsubsampled complex contourlet transform[J]. Journal of Optoelectronics·laser, 2009, 0(8) | |
| Authors: | WANG Yong-sheng FU Yong-qing |
| Affiliation: | College of Information and Communication Engineering;Harbin Engineering University;Harbin 150001;China |
| Abstract: | A novel nonsubsampled complex contourlet transform(NSCCT)is constructed by combining the two dimensional dual-tree complex wavelet transform(DT-CWT)and nonsubsampled directional filter bank(NSDFB).And an algorithm of image denoising based on nonsubsampled complex contourlet transform is proposed by using the symmetric normal inverse Gaussian distribution prior and a Bayesian minimum mean squared error estimator.The experimental results show that the nonsubsampled complex contourlet transform can restrain Gi... |
| Keywords: | image denoising contourlet transform(CT) nonsubsampled complex contourlet transform(NSCCT) |
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