| 医学图像融合中最佳小波分解层数的选择 |
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| 引用本文： | 杨飒. 医学图像融合中最佳小波分解层数的选择[J]. 计算机工程与设计, 2008, 29(20) |
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| 作者姓名： | 杨飒 |
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| 作者单位： | 广东教育学院物理系,广东广州,510303 |
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| 基金项目： | 广东省科技厅科技计划基金 |
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| 摘 要： | 根据小波低频子带图像的轮廓模糊度和高频子带图像的细节信息量随小波分解层教增多而增多的规律,从图像熵出发,提出了一种基于低频子带图像熵差的最佳小波分解层数选择法,该方法通过计算不同分解层数下各低频子带的图像熵差,选择最接近原始图像熵差的分解层数作为最佳分解层数.用多种基于小波变换的图像融合法分别对两组医学图像进行仿真实验,结果表明根据该分解层数选择法得到的融合图像目视效果最好,与相关系数、峰值信噪比、模糊Chebyshev距离值等客观评价指标保持了很好的一致性.
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| 关 键 词： | 医学图像融合 小波分解层教 图像熵 客观评价参数 PCA变换 |
Selection of optimal decomposition level of wavelet for medical image fusion |
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| YANG Sa. Selection of optimal decomposition level of wavelet for medical image fusion[J]. Computer Engineering and Design, 2008, 29(20) |
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| Authors: | YANG Sa |
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| Affiliation: | YANG Sa(Department of Physics,Guangdong Education Institute,Guangzhou 510303,China) |
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| Abstract: | According to the law that the contour fuzziness of the low-frequency sub-band and the detail information of the high-frequency sub-band increase with the growth of the wavelet decomposition levels,an effect selection method of the optimal decomposition level is proposed.Firstly,the difference of original image entropy is calculated.Then,the differences of the low-frequency sub-image entropy based on different decomposition level are calculated.Finally,the decomposition level which makes the difference of th... |
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| Keywords: | medical image fusion wavelet decomposition level image entropy objective evaluation criteria PCA transform |
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