| 基于自适应小波变换的嵌入图像压缩算法 |
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| 引用本文： | 王向阳,崔永瑞,杨红颖,赵红.基于自适应小波变换的嵌入图像压缩算法[J].微电子学与计算机,2005,22(2):121-123. |
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| 作者姓名： | 王向阳 崔永瑞 杨红颖 赵红 |
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| 作者单位： | 1. 南京大学计算机软件新技术国家重点实验室,江苏,南京,210093;辽宁师范大学计算机与信息技术学院,辽宁,大连,116029
2. 辽宁师范大学计算机与信息技术学院,辽宁,大连,116029 |
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| 基金项目： | 国家重点实验室基金，辽宁省自然科学基金 |
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| 摘 要： | 针对遥感、指纹、地震资料等图像纹理复杂丰富、局部相关性较弱等特点,文章通过实施自适应小波变换、合理确定系数扫描次序、分类量化小波系数等措施,提出了一种高效的图像压缩编码算法.仿真结果表明,相同压缩比下,本文算法的图像复原质量明显优于SPIHT算法(特别是对于纹理图像,如标准图像Barbara).
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| 关 键 词： | 图像压缩 自适应小波变换 量化 |
| 文章编号： | 1000-7180(2005)02-121-03 |
| 修稿时间： | 2004年5月18日 |
A New Image Coding Algorithm Based on Adaptive Wavelet Transform |
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| WANG Xiang-yang,CUI Yong-rui,YANG Hong-ying,ZHAO Hong.A New Image Coding Algorithm Based on Adaptive Wavelet Transform[J].Microelectronics & Computer,2005,22(2):121-123. |
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| Authors: | WANG Xiang-yang CUI Yong-rui YANG Hong-ying ZHAO Hong |
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| Abstract: | In order to improve the compression efficiency of texture-rich images, a new image coding algorithm based on adaptive wavelet transform is proposed in this paper. First, adaptive wavelet transform is applied to texture-rich image. Second, the order for scanning wavelet coefficients is identified based on the image content. Finally, the DPCM is used to code the wavelet coefficients in the lowest frequency subband, the vector quantization is used to code the wavelet coefficients in the other high frequency subbands, and the outputs are supplied to adaptive arithmetic coder. The experiment results show that this new wavelet coder is competitive to, and open outperforms the best wavelet coding algorithm (such as SPIHT), especially for the textured images. |
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| Keywords: | Image coding Adaptive wavelet transform Quantization |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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