| 基于线性混合小波基的图像去噪 |
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| 引用本文： | 龚昌来.基于线性混合小波基的图像去噪[J].光电工程,2008,35(10):70-75. |
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| 作者姓名： | 龚昌来 |
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| 作者单位： | 嘉应学院电子信息工程系,广东梅州,514015 |
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| 摘 要： | 单小波基由于时频特性难以与复杂的图像特征相匹配,限制了小波闽值算法在图像去噪效果上的进一步提高.提出了一种基于线性混合小波基的图像去噪方法,将多个不同特性的正交小波基进行线性混合构成一个新的小波基,用该混合小波基对图像进行分解后再通过阈值处理实现去噪.调节混合系数,可使混合小波基的时频特性与图像特征相匹配,从而提高小波阈值去噪效果.实验结果表明,该方法去噪效果优于参与混合的各单小波基去噪效果,其峰值信噪比(PSNR)最大可提高3.5 dB.
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| 关 键 词： | 离散小波变换 小波滤波器 小波阈值去噪 线性混合小波基 |
| 收稿时间： | 2008/1/7 |
Image Denoising Method Based on Linear Combined Wavelet Base |
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| GONG Chang-lai.Image Denoising Method Based on Linear Combined Wavelet Base[J].Opto-Electronic Engineering,2008,35(10):70-75. |
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| Authors: | GONG Chang-lai |
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| Affiliation: | GONG Chang-lai(Department of Electronic , Information Engineering,Jiaying University,Meizhou 514015,Guangdong Province,China) |
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| Abstract: | As the time-frequency characteristic of single wavelet base is difficult to match with complex image feature,the image denoising effect could hardly be improved further in the wavelet threshold denoising method.A new image denoising method based on linear combined wavelet base is proposed.Firstly,a new wavelet base is constructed by linear combination with multiple differences orthogonal wavelet base,and then the combined wavelet base is used to decompose the image.Finally the denoising image is obtained by... |
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| Keywords: | discrete wavelet transform wavelet filter wavelet threshold denoising linear combined wavelet base |
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