| 嵌入式图像编码的高效性与实现 |
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| 引用本文： | Keita Alpha,彭嘉雄.嵌入式图像编码的高效性与实现[J].华中科技大学学报(自然科学版),2001,29(9):95-98. |
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| 作者姓名： | Keita Alpha 彭嘉雄 |
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| 作者单位： | 华中科技大学图像识别与人工智能研究所 |
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| 基金项目： | 航天科技创新基金资助项目 |
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| 摘 要： | 研究嵌入式图像编码的效率，指出实际图像在小波基上分解时，可知大的分解系数量化值相对于小的系数量化值位置的先验信息，从而实现嵌入编码的高效性，研究了小波编码与零树编码的实现，将嵌入小波编码的重要性图存放在零树中，并用四叉树结构表示，实验与分析表明，在0．25比特／像素的情形下就能获得视觉质量高的图像，比JPEG编码结果要好；小波嵌入编码的计算峰值信噪比曲线与理论估计的符合良好。
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| 关 键 词： | 图像处理 零树编码 图像编码 小波嵌入编码 系数量化值 四叉树结构 |
| 文章编号： | 1000-8616(2001)09-0095-04 |
| 修稿时间： | 2001年3月16日 |
High Efficiency of Embedded Image Coding and Its Implementation |
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| Keita Alpha.High Efficiency of Embedded Image Coding and Its Implementation[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2001,29(9):95-98. |
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| Authors: | Keita Alpha |
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| Abstract: | It shows that prior information on the location where quantized value of large coefficients is comparative to that of coefficients is available in coding when natural images are decomposed on wavelet bases. The high efficiency of embedded coding is implemented. Wavelet embedded coding and implementation of zero tree coding are also considered. The significant map of embedded wavelet coding is stored in zero tree. A quad-tree is used to denote the significant map in wavelet zero-tree coding. Experiments and analysis show that images with high quality are obtained in the case of only 0.25bit/pixel. The computed and estimated peak to peak SNR cures are dovetailed excellently in wavelet embedded coding. |
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| Keywords: | image processing embedding zero-tree coding |
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