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| 7/5双正交小波的构造及图像编码应用 | |
| 引用本文： | 高成秀,刘在德,王智平.7/5双正交小波的构造及图像编码应用[J].兰州理工大学学报,2006,32(2):89-92. |
| 作者姓名： | 高成秀 刘在德 王智平 |
| 作者单位： | 1. 兰州工业高等专科学校,机械工程系,甘肃,兰州,730050 2. 西安交通大学,电子与信息工程学院,陕西,西安,710049 3. 兰州理工大学,材料科学与工程学院,甘肃,兰州,730050 |
| 摘 要： | 根据双正交小波精确重构条件,推导出了7/5双正交小波滤波器组的参数化表达式.该表达式参数可随意取值,因此能够任意构造具有不同特征的7/5线性相位小波滤波器.作为构造实例,构造了具有最佳编码增益的有理系数7/5小波滤波器.实验表明,它具有与CDF 9/7小波滤波器相似的图像压缩性能,而且其提升小波变换的计算效率可提高20%. |
| 关 键 词： | 双正交小波 滤波器 最佳编码增益 离散小波变换 提升 图像编码 |
| 文章编号： | 1673-5196（2006）02-0089-04 |
| 收稿时间： | 2005-06-23 |
| 修稿时间： | 2005年6月23日 |
Construction of 7/5 biorthogonal wavelet and its application to image coding |
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| GAO Cheng-xiu,LIU Zai-de,WANG Zhi-ping.Construction of 7/5 biorthogonal wavelet and its application to image coding[J].Journal of Lanzhou University of Technology,2006,32(2):89-92. | |
| Authors: | GAO Cheng-xiu LIU Zai-de WANG Zhi-ping |
| Abstract: | The parametric expressions of 7/5 biorthogonal wavelet filter bank(FB) family were derived based on the perfect reconstruction condition of such wavelet.By assigning various arbitrary real numbers to the parameter in its expression,any 7/5 FB with different features can be constructed with ease;all of them have the linear phase.As an illustration,a rational-coefficient 7/5 FB with optimal coding gain was constructed.Extensive simulations showed that it has compact performance similar to that of the popular 9/7 FB by Cohen,Daubechies,and Feauveau for image coding,and the corresponding lifting of discrete wavelet transform(DWT) gains an improvement upon computational efficiency up to 20% over the latter. |
| Keywords: | biorthogonal wavelet filter bank optimal coding gain discrete wavelet transform lifting image coding |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |