| 图像压缩建议标准中的变换 |
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| 引用本文： | 林守惠,汶德胜,米斌.图像压缩建议标准中的变换[J].科学技术与工程,2007,7(23):6193-6197. |
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| 作者姓名： | 林守惠 汶德胜 米斌 |
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| 作者单位： | 中国科学院西安光学精密机械研究所,西安,710119 |
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| 摘 要： | 研究了一种新的可用于无损图像压缩的小波变换,该变换是空间数据系统咨询委员会(CCSDS)图像压缩建议标准中采用的一种近似"9/7"整数离散小波变换。全文以典型的Cameraman图像为例,示出了各级变换后的图像,最后给出了去相关性和变换后各层子图像能量分布的理论公式,把文中研究的变换与JPEG2000中无损图像压缩的缺省滤波器"5/3"整数小波从这两个角度做比较,给出比较结果,得出了近似"9/7"整数离散小波是一种性能较好的变换方式的结论。
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| 关 键 词： | “9/7”整数离散小波变换 CCSDS 去相关性 能量分布 |
| 文章编号： | 1671-1819(2007)23-6193-05 |
| 修稿时间： | 2007-08-06 |
Introduction of Transform Based on Image Compression Recommended Standard |
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| LIN ShoU-hui,WEN De-sheng,MI Bin.Introduction of Transform Based on Image Compression Recommended Standard[J].Science Technology and Engineering,2007,7(23):6193-6197. |
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| Authors: | LIN ShoU-hui WEN De-sheng MI Bin |
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| Abstract: | A new wavelet transform using image lossless compression is studied.It was "9/7"-like integer DWT which was adopted by the Consultative Committee for Space Data Systems (CCSDS) image compression recommended standard .Also it gave academic formulas of de-correlation performance and the energy distribution of each subbands after transformed. The performance of transform was evaluated based on this two points .At last it showed an example, which was a typical image of Cmeraman. Comparing "5/3" integer DWT using in JPEG2000 for image lossless compression,a conclusion is draw that this new "9/7"-like integer DWT is a better transform . |
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| Keywords: | "9/7"-like integer DWT CCSDS de-correlation energy distribution |
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