| 基于整数提升小波变换的图像去噪方法 |
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| 引用本文： | 胡亮,黄宏光,郭晨格.基于整数提升小波变换的图像去噪方法[J].中国科技信息,2008,90(5):278-280. |
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| 作者姓名： | 胡亮 黄宏光 郭晨格 |
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| 作者单位： | 四川大学电气信息学院,610065 |
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| 摘 要： | 由于传统小波变换在图像去噪应用上的一些缺点，本文使用整数提升方法进行图像去噪。整数提升方法不受Fourier变换限制，其具有传统小波的多分辨率特性，而且运算速度有很大的提高。提升方法可以从一个新的角度来构造小波滤波器，它的核心是确定预测算子和更新算子，对每步提升下取整，就实现了整数小波变换。将其去噪去噪效果与传统小波变换的去噪效果进行了比较。仿真结果表明，整数提升方法取得了比传统小波变换更好的去噪效果。
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| 关 键 词： | 提升方法 整数小波变换 图像去噪 硬阈值 软阈值 整数提升小波变换 图像去噪 去噪方法 lifting scheme integer based denoising 仿真结果 比较 效果 整数小波变换 更新算子 预测算子 核心 小波滤波器 构造 运算速度 特性 多分辨率 Fourier |
Image denoising based on integer lifting scheme |
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| Hu Liang,Huang Hongguang,Guo Chengge.Image denoising based on integer lifting scheme[J].CHINA SCIENCE AND TECHNOLOGY INFORMATION,2008,90(5):278-280. |
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| Authors: | Hu Liang Huang Hongguang Guo Chengge |
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| Abstract: | In view of the defects of conventional wavelet transform in denoising the digital image, the denoising method based on the integer lifting scheme is performed. The integer lifting scheme works without Fourier transform, which inherits the multi-- resolution characteristic of the conventional wavelet transform, and can speed up the operation greatly. The lifting scheme is a new idea of constructing wavelet filters. It is important to find the predict operator and the update operator. These lifting steps take integers downwardly, then the wavelet transforms that map integers to integers are realized. And the results of denoising by using the integer lifting scheme are compared with the traditional wavelet transform. The simulated results show that the integer lifting scheme has achieved the noise reduction better than the achieved by traditional wavelet transform. |
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| Keywords: | Shifting scheme Integer Wavelet transform Image de-noising Hard threshold Soft threshold |
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