| 干涉超光谱图像的压缩算法 |
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| 引用本文： | 宋杨,符华儿.干涉超光谱图像的压缩算法[J].计算机应用与软件,2008,25(3):230-232,245. |
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| 作者姓名： | 宋杨 符华儿 |
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| 作者单位： | 海南大学信息科学技术学院,海南,海口,570228 |
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| 摘 要： | 干涉超光谱图像的数据呈现非平稳特性,相邻谱线之间的相关性较弱,所以直接采用小波变换不利于去除数据之间的相关性.提出了一种将光谱数据采用EMD预处理,并对处理后的数据采用分类处理的算法,将每根谱线分为主干涉区域和非主干涉区域两部分,分别采用相似匹配和二次曲线拟合的方法对数据进行分解,避免了相似匹配中不利于硬件实现的开方运算.仿真结果表明:该算法可降低无损压缩输出码率达0.3bpp左右,并且可以提高有损压缩的效率.
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| 关 键 词： | 图像处理 图像压缩 EMD 相似匹配 无损压缩 二次曲线拟合 |
| 收稿时间： | 2006-12-08 |
| 修稿时间： | 2006年12月8日 |
A COMPRESSION ALGORITHM FOR INTERFERENCE HYPER-SPECTRAL IMAGES |
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| Song Yang,Fu Huaer.A COMPRESSION ALGORITHM FOR INTERFERENCE HYPER-SPECTRAL IMAGES[J].Computer Applications and Software,2008,25(3):230-232,245. |
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| Authors: | Song Yang Fu Huaer |
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| Affiliation: | Song Yang Fu Huaer(College of Information Science , Technology,Hainan University,Haikou 570228,Hainan,China) |
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| Abstract: | The spectral data of interference spectral images is noninear,and the correlations between the spectral lines are weak,which makes it hard to eliminate the correlations by wavelet transformation directly. A novel method for data classification after EMD pretreatment is proposed. The data of each spectral line are decomposed into two classes, main-interference class and non main-interference class. The similarity-based matching method and the 2-order curve-fitting algorithm are separately employed for compressing the data of each class. The extraction operation of square root that goes against hardware implementation in the similarity-based matching method is avoided. The experimental results show that the method can decrease the output rate of lossless compression by 0.3bpp and improve the efficiency of loss compression. |
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| Keywords: | Image processing Image compression EMD Similarity-based matching Lossless compression 2-order curve-fitting |
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