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| 图像相似性计算的级联小波变换 | |
| 引用本文： | 丁广太,王威. 图像相似性计算的级联小波变换[J]. 上海大学学报(自然科学版), 2007, 13(5): 571-577 |
| 作者姓名： | 丁广太 王威 |
| 作者单位： | 上海大学,计算机工程与科学学院,上海,200072;上海大学,计算机工程与科学学院,上海,200072 |
| 摘 要： | 研究图像不同幅度局部(子图像)小波变换之间的关系，分析这种关系下的图像相似性.首先用小波矩阵表示推导子图像小波变换之间的级联关系，在此基础上研究基于级联小波变换的线性相似性.最后以特定类型的医学图像为对象，研究子图像之间和k 规格小波相似性测度，并讨论相应的相似性测度算法.数值实验结果表明，CT、MRI图像中相邻子图像之间具有很高的线性相似性. |
| 关 键 词： | 小波变换 图像相似性 线性相似性 级联图像变换 图像检索 |
| 文章编号： | 1007-2861（2007）05-0571-07 |
| 收稿时间： | 2007-05-10 |
| 修稿时间： | 2007-05-10 |
Image Similarity Based on Hierarchical Wavelet Transform |
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| DING Guang-tai,WANG Wei. Image Similarity Based on Hierarchical Wavelet Transform[J]. Journal of Shanghai University(Natural Science), 2007, 13(5): 571-577 | |
| Authors: | DING Guang-tai WANG Wei |
| Affiliation: | School of Computer Engineering and Science, Shanghai University, Shanghai 200072， China |
| Abstract: | Scalar relationship between wavelet transforms of two sub images from two different images is discussed. Image similarity based on this relationship is defined and studied. Hierarchical wavelet transform of a local area (sub image) is demonstrated using the matrix form of wavelet transform. Based on the hierarchical wavelet transforms, linear similarity of two images of a particular type of medical images such as CT and MRI and a k-form wavelet similarity measure are discussed. The algorithm for computing similarity of two sub-images is analyzed. Numerical calculation shows effectiveness of the described similarity calculation, especially for medical images. |
| Keywords: | wavelets transform image similarity linear similarity hierarchical image transform image retrieval |
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