| 基于小波与小波包分析的CT图像去噪研究 |
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| 引用本文： | 薛慧.基于小波与小波包分析的CT图像去噪研究[J].中国医学物理学杂志,2011,28(2):2541-2545. |
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| 作者姓名： | 薛慧 |
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| 作者单位： | 滨州医学院卫生管理学院,山东,滨州,256603 |
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| 摘 要： | 目的:小波与小波包分析在医学CT图像噪声抑制方面的应用价值研究。方法:采用MATLAB6.5对512×512的CT图像进行实验。提出了小波局部阈值软硬函数折中消噪方法。并将此方法与小波强制消噪、全局阈值硬函数消噪、全局阈值软函数消噪、及小波包消噪的方法进行了对比。结果:从实验中可以得出小波包消噪效果最好,能够有效的滤除图像中的噪声且边缘效果保持良好,本文提出的小波局部阈值软硬函数折中消噪法也能能够有效的滤除图像中的噪声,效果较小波强制消噪、全局阈值硬函数消噪、全局阈值软函数消噪要好,但是边缘效果及噪声滤除的程度都不及小波包。结论:实验结果表明本文提出的小波局部阈值软硬函数折中消噪方法在小波消噪方面具有一定的价值。
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| 关 键 词： | 医学CT图像 小波分析 小波包分析 图像去噪 |
Study of Medical Computed Tomography Image De-noising Based on Wavelet and Wavelet Packets Analysis |
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| XUE Hui.Study of Medical Computed Tomography Image De-noising Based on Wavelet and Wavelet Packets Analysis[J].Chinese Journal of Medical Physics,2011,28(2):2541-2545. |
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| Authors: | XUE Hui |
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| Institution: | XUE Hui (Dept of College of Health Management,Binzhou Medical University,Binzhou Shandong 264003,China) |
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| Abstract: | Objective: The study is to probe the practical value of Wavelet and Wavelet Packets analysis in the field of CT image De-noising.Methods: The experiment employed MATLAB 6.5 to analyse 512×512 CT image,the paper proposed a compromise de-noising method of the soft and hard function based on the wavelet partial threshold value.Contrasted with wavelet compulsory de-noising,the hard function de-noising of overall threshold value,the soft function de-noising of overall threshold value,and wavelet packets de-noisi... |
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| Keywords: | medical Computed Tomography(CT) image wavelet analysis wavelet packets analysis image de-noising |
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