|
|||||
|
|
| 一种新的小波零树量化编码方法 | |
| 引用本文： | 杭小庆,刘晓军,张素文. 一种新的小波零树量化编码方法[J]. 武汉工业学院学报, 2001, 0(4): 28-30,36 |
| 作者姓名： | 杭小庆 刘晓军 张素文 |
| 作者单位： | 1. 武汉大学计算机学院 2. 武汉工业学院电气信息工程系, 3. 武汉理工大学自动化学院 |
| 摘 要： | 利用EZW进行图像数据压缩一般的步骤是：小波变换；零树量化编码；熵编码。为了提高压缩比和编码效率，本文提出了一种非常有效的编码方案。主要是：利用零树量化编码后出现了许多连续的次要系数根这一特点，将熵编码与零树编码统一进行，一次完成，熵编码采用变长零游程方法。实验表明，图像经该方法编码后压缩比得到了提高。 |
| 关 键 词： | 小波零树量化编码 EZW 图像数据压缩 小波变换 熵编码 |
| 文章编号： | 1009-4881(2001)04-0028-03 |
A NEW IMAGE COMPRESSION CODING BASED ON ZEROTREE OF WAVELET COEFFICIENTS |
|
| HANG Xiao_qing ,LIU Xiao_jun ,ZHANG Su_wen. A NEW IMAGE COMPRESSION CODING BASED ON ZEROTREE OF WAVELET COEFFICIENTS[J]. Journal of Wuhan Polytechnic University, 2001, 0(4): 28-30,36 | |
| Authors: | HANG Xiao_qing LIU Xiao_jun ZHANG Su_wen |
| Affiliation: | HANG Xiao_qing 1,LIU Xiao_jun 2,ZHANG Su_wen 3 |
| Abstract: | The general steps to carry out image compression by using EZW are: 1.wavelet transform; 2.zerotree quantification coding;3. entropy coding. To raise compression ratio and coding efficiency, this paper proses an effective compression coding based on zerotree of wavelet coefficients .It mainly includes the simultaneous encoding of entropy and zerotrere,because many consecutive zerotree roots have appeared , in zerotree quantification codings. Entropy coding adopts run-length-changeablecoding.Experimental results show that encoding by this method can result in higher compression rations. |
| Keywords: | wavelet transform image compression EZW entropy coding |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |