基于改进SPIHT算法的SAR图像压缩 |
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作者姓名: | 王璐 张志敏 |
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作者单位: | 1. 中国科学院电子学研究所, 北京 100190;
2. 中国科学院研究生院, 北京 100049 |
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基金项目: | 中国科学院百人计划项目(6059-07)资助 |
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摘 要: | 小波变换和多级树集合分裂算法(SPIHT)在合成孔径雷达(SAR)图像压缩方面取得了良好的效果,但SPIHT编码方法的复杂性制约了压缩速率的提高. 针对SPIHT编码速度慢和占用内存大的问题,提出一种改进的无链表SPIHT算法,以提高编码运算速度,减少资源占用量,使其适于硬件实现. 实验结果表明,该方法能达到与原算法相同的压缩效果,而运算速度大大提高,适于实时实现.
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关 键 词: | 合成孔径雷达 图像压缩 嵌入式编码 无链表SPIHT |
收稿时间: | 2011-01-19 |
修稿时间: | 2011-03-10 |
SAR image compression based on modified SPIHT |
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Authors: | WANG Lu ZHANG Zhi-Min |
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Institution: | 1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China |
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Abstract: | Wavelet transform and SPIHT has achieved a perfect effect on SAR(synthetic aperture radar) image compression, but the complexity of SPIHT limits the encoding rate. Considesing slow coding rate and large memory consuming of SPIHT, we propose a modified listless SPIHT in order to speed up the coding rate. The experiments show that this new method can achieve the same compression effect as SPIHT while has a far faster rate than the original one. So it is suitable for real-time application. |
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Keywords: | synthetic aperture radar (SAR) image compression embedded coding listless SPIHT |
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