| 基于谱间DPCM和整数小波变换的超光谱图像无损压缩 |
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| 引用本文： | 吴冬梅,王军,张海宁.基于谱间DPCM和整数小波变换的超光谱图像无损压缩[J].光子学报,2008,37(1):156-159. |
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| 作者姓名： | 吴冬梅 王军 张海宁 |
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| 作者单位： | 1. 西安科技大学,通信与信息工程学院,西安,710054
2. 西安工业大学,电子信息工程学院,西安,710032 |
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| 摘 要： | 分析了干涉成像光谱仪所获取图像的谱间和空间相关性,提出了一种混合无损压缩方案.首先进行谱间DPCM预测,再对残差图像采用整数小波变换,最后对小波系数进行二值自适应算术编码.实验结果表明,该算法可实现无损压缩,压缩比平均可达2.018,较二维整数小波变换算法提高40.3%.并且算法复杂度较低,只有加减和移位运算,易于硬件实现.
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| 关 键 词： | 超光谱图像 无损压缩 谱间DPCM 整数小波变换 二值自适应算术编码 |
| 文章编号： | 1004-4213（2008）01-0156-4 |
| 收稿时间： | 2007-04-23 |
| 修稿时间： | 2007年4月23日 |
Research of Hyper-spectral Image Lossless Compressing Technology Based on DPCM Between Spectra and IWT |
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| WU Dong-mei,WANG Jun,ZHANG Hai-ning.Research of Hyper-spectral Image Lossless Compressing Technology Based on DPCM Between Spectra and IWT[J].Acta Photonica Sinica,2008,37(1):156-159. |
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| Authors: | WU Dong-mei WANG Jun ZHANG Hai-ning |
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| Abstract: | The spectral correlation and spatial correlation of images from interferential imaging spectrometer is analyzed and calculated.The mixed lossless compression scheme is proposed.This scheme includes three aspects:DPCM between Spectra,Integer Wavelet Transform to prediction error image and adaptive bit-level Arithmetic Coding to Wavelet coefficient.The experimental data shows that the algorithm has carried out lossless compression,the average of compression ratio is up to 2.018.It is increase 40.3% in comparison with Integer Wavelet Transform of two dimensions.This algorithm use addition-subtration and shifts to complete data compression.Implementation with hardware is easier. |
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| Keywords: | Hyper-spectral image Lossless -compressing DPCM between spectra Integer wavelet transform（IWT） Adaptive bit-level arithmetic coding |
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