| 基于二维离散余弦变换的图像数据压缩编码 |
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| 引用本文： | 支建伟.基于二维离散余弦变换的图像数据压缩编码[J].浙江传媒学院学报,2003,10(1):75-77. |
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| 作者姓名： | 支建伟 |
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| 作者单位： | 浙江广播电视高等专科学校信息工程系 |
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| 摘 要： | 本文分析了现有的国际图像压缩标准,离散余弦变换造成了恢复图像的块效应,图像压缩倍数有限。我们讨论了切匹雪夫(CHEBYCHEV)多项式计算二维离散余弦变换的思想,充分利用切匹雪夫多项式系数的快速收敛性,发挥切匹雷夫多项式系数的最 优下降特性,从而进一步提高图像数据的压缩倍数。
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| 关 键 词： | 图像数据压缩 离散余弦变换 切匹雪夫多项式 变换编码 |
The Image Date Compression Coding Based on 2-D DCT |
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| Zhi Jianwei.The Image Date Compression Coding Based on 2-D DCT[J].Journal of Zhejiang Institute of Medial Communications,2003,10(1):75-77. |
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| Authors: | Zhi Jianwei |
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| Institution: | Zhi Jianwei |
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| Abstract: | This paper analyzes current image compression standards, the block effects and limits of image compression ratio produced by DCT transformation in decoded picture. It also discusses how to compute 2-D DCT by means of Chebychev polynomial transformation algorithm. It shows that the optimal descending features of Chebychev polynomial coefficients may be obtained by exploiting the fast convergence property of Chebychev polynomial coefficients so as to further promote the compression ratio in decompression picture. |
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| Keywords: | image date compression DCT Chebychev Polynomial Transformation Coding |
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