| 基于改进的嵌入式零树小波变换的图像压缩算法 |
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| 引用本文： | 洪歧,宋涛,曹亮,王鹏,唐磊,张飞.基于改进的嵌入式零树小波变换的图像压缩算法[J].陕西理工学院学报(自然科学版),2011,27(3). |
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| 作者姓名： | 洪歧 宋涛 曹亮 王鹏 唐磊 张飞 |
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| 作者单位： | 陕西理工学院计算机科学与技术系,陕西汉中,723001 |
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| 基金项目： | 陕西理工学院2010年大学生创新实验项目(UIRP1034);陕西理工学院科研基金资助项目(SLGQD0903) |
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| 摘 要： | 经过对嵌入式小波零树编码(EZW)算法的基本理论分析,对原图像EZW算法进行了改进,提出了一种把小波系数向下取整后并将出现频次较多的系数置零的改进方法,从而减少了EZW算法中扫描次数,节省了存贮空间.实验仿真结果表明,此算法一方面提高了编码效率,另一方面重构图像的质量也并无明显下降.
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| 关 键 词： | 频次 图像压缩 小波系数 嵌入式小波零树编码(EZW) |
Image compression algorithm based on an improved embedded zerotree wavelet |
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| HONG Qi,SONG Tao,CAO Liang,WANG Peng,TANG Lei,ZHANG Fei.Image compression algorithm based on an improved embedded zerotree wavelet[J].Journal of Shananxi University of Technology:Natural Science Edition,2011,27(3). |
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| Authors: | HONG Qi SONG Tao CAO Liang WANG Peng TANG Lei ZHANG Fei |
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| Institution: | HONG Qi,SONG Tao,CAO Liang,WANG Peng,TANG Lei,ZHANG Fei (Department of Computer Science & Technology,Shaanxi University of Technology,Hanzhong 723001,China) |
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| Abstract: | After analyzing the basic theory of the EZW algorithm the principles of the original image coding algorithm is improved.Aftera rounded down to the wavelet coefficients was taken,the frequency of zero coefficient of more improved method to reduce the EZW algorithm appeared,to reduce the number of scans.Experimental results show that this algorithm improves the coding efficiency on the one hand,on the other hand the quality of the reconstructed image is not significantly decreased. |
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| Keywords: | frequency image compression wavelet coefficients embedded zerotree coding(EZW) |
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