联合数据压缩技术在地震勘探中的应用
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摘要
对于“海量”的地震数据,一般压缩方法的效果不好。利用离散余弦变换编码和离散小波变换编码的联合压缩技术,对地震勘探数据进行了压缩处理,结果表明:本压缩方法能提高压缩比,保留更多的地震信号中细节信息,具有良好的压缩性能和很好的计算性能。联合压缩技术对于不同的地震数据压缩都有效果,但是压缩比不尽相同。
The general compression way is not satisfied with the mass seismic data.The authors used united compression technique of discrete cosine transformation in combination with discrete wavelet transformation to compress seismic data.The results show that the compression ratio could be improved with more of preservations the minute information of seismic signals.Using this way is better in performance of compression and computing,and efficient for various seismic data,but it is different in the compression ratio.
The general compression way is not satisfied with the mass seismic data.The authors used united compression technique of discrete cosine transformation in combination with discrete wavelet transformation to compress seismic data.The results show that the compression ratio could be improved with more of preservations the minute information of seismic signals.Using this way is better in performance of compression and computing,and efficient for various seismic data,but it is different in the compression ratio.
引文
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[9]冯占林,张学工,李衍达.基于小波变换的地震勘探数据压缩的工程分析[J].清华大学学报:自然科学版,2001,41(4/5):170-173.FENG Zhan-lin,ZHANG Xue-gong,LI Yan-da.Somepractical aspects of seismic data compression based onwavelet transform[J].Journal of Tsinghua Universi-ty:Natural Science Edition,2001,41(4/5):170-173.
[2]Joonas L.Limiting distortion of a wavelet image codec[J].Acta Cybernetica,1999,14:1-16.
[3]刘财,王培茂,薛亚丽,等.离散余弦变换(DCT)编码在地震勘探数据压缩上的应用[J].吉林大学学报:地球科学版,2004,34(2):277-282.LIU Cai,WANG Pei-mao,XUE Ya-li,et al.The dis-crete cosine transform coding applied to seismic data com-pression[J].Journal of Jilin University:Earth ScienceEdition,2004,34(2):277-282.
[4]刘琦,韩承德.基于二维小波分解的图象编码[J].计算机辅助设计与图形学学报,1996,8(1):18-25.LIU Qi,HAN Chen-de.Image coding using 2D wavelettransform[J].China J CAD&CG,1996,8(1):18-25.
[5]薛晓辉,高文,冯英浚.基于小波变换的静止图象压缩系统[J].宇航学报,1997,18(1):67-75.XUE Xiao-hui,GAO Wen,FENG Ying-jun.Still imagecompression system based on wavelet transform[J].Journal of Astronautics,1997,18(1):67-75.
[6]陈东义,曹长修,朱冰莲.Mallat塔式算法在一维信号处理中的应用研究[J].重庆大学学报:自然科学版,1999,22(4):49-53.CHEN Dong-yi,CAO Chang-xiu,ZHU Bing-lian.Re-search on applying Mallat’s pyramid algorithm to processone dimensional signal[J].Journal of Chongqing Uni-versity:Natural Science Edition,1999,22(4):49-53.
[7]唐向宏,贺振华,黄德济.利用二维M带小波变换进行地震数据压缩[J].石油地球物理勘探,1999,34(2):227-234.TANG Xiang-hong,HE Zhen-hua,HUANG De-ji.Seis-mic data compression using 2-D M-band wavelet trans-form[J].Oil Geophysical Prospecting,1999,34(2):227-234.
[8]张学工,李衍达,盛硕.几种现代信息处理技术和计算机网络在勘探地球物理中的应用[J].地球物理学报,1997,40(增):275-291.ZHANG Hue-Gong,LI Yan-da,SHENG Shuo.Applica-tion of some modern information processing and computernetwork techniques in exploration geophysics[J].ActaGeophysics Sinica,1997,40(Suppl.):275-291.
[9]冯占林,张学工,李衍达.基于小波变换的地震勘探数据压缩的工程分析[J].清华大学学报:自然科学版,2001,41(4/5):170-173.FENG Zhan-lin,ZHANG Xue-gong,LI Yan-da.Somepractical aspects of seismic data compression based onwavelet transform[J].Journal of Tsinghua Universi-ty:Natural Science Edition,2001,41(4/5):170-173.
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