21501.基于提升小波的地震勘探數(shù)據(jù)壓縮研究

1、摘要隨著地震勘探技術(shù)正向多維、多參數(shù)、多分量、高分辨率方向發(fā)展，獲取的地震勘探數(shù)據(jù)量也越來(lái)越大，這給存儲(chǔ)器的存儲(chǔ)容量、計(jì)算機(jī)的處理速度以及遠(yuǎn)程網(wǎng)絡(luò)的傳輸帶來(lái)了極大的壓力。因此，對(duì)地震勘探數(shù)據(jù)進(jìn)行有效壓縮具有實(shí)際的意義。地震勘探數(shù)據(jù)中存在冗余，為數(shù)據(jù)壓縮提供了可能，而采取小波變換對(duì)地震勘探數(shù)據(jù)進(jìn)行變換能夠?qū)崿F(xiàn)對(duì)勘探數(shù)據(jù)的壓縮，且一定壓縮比的數(shù)據(jù)進(jìn)行重建后仍然能夠滿足勘探精度的要求。本文首先對(duì)現(xiàn)有小波基進(jìn)行分析，選擇出適應(yīng)于地震勘探數(shù)據(jù)小波

2、變換的lO種小波基。接著使用這10種小波基對(duì)地震勘探數(shù)據(jù)進(jìn)行提升小波的正逆變換，采用SPIHT算法對(duì)提升小波變換后的數(shù)據(jù)進(jìn)行壓縮和解壓縮編碼。通過(guò)使用信噪比、剩余能量和形態(tài)逼真度對(duì)地震勘探原始數(shù)據(jù)和重構(gòu)數(shù)據(jù)進(jìn)行分析和評(píng)價(jià)，確定了進(jìn)行地震勘探數(shù)據(jù)壓縮效果最優(yōu)的小波基、提升小波變換次數(shù)和壓縮倍率。關(guān)鍵詞：地震勘探數(shù)據(jù)，提升小波變換，SPIHT算法，信噪比AbstractWiththedevelopingofseismicexploratio

3、ntechniqueinthedirectionofmultidimensional，multiparametermulticomponentandhighresolution，theseismicexplorationdataisincreasingdaybydaythisgivesthestoragecapacityofthememo巧andtheDepartmemofcomputerTheseismicprospectingdat

4、ahasredundancysothecompressionofdataispossibleTakingwavelettransformonseismicexplorationdatatransformnotonlyCanachievetheexplorationdatacompression，butalsoacertaincompressxonratioCanstillsatisfytheexplorationprecisionFir

5、stlythispaperanalyzestheexistingⅥ，aveletbaseandselect10kindsofwaveletbasewhichissuitableforseismicexplorationdataThenusing10kindsofwaveletbasetotransf01“111andinversetransformtheseismicdatathroughtheliftingwaveletmethodF

6、inally，usingSPIHTalgorithmtomakethecompressionanddecompressioncodefortheseismicdataByusingthesignaltonoiseration，theresidualenergyandmorphologicaltoanalyzeandevaluatetheorginaldatathenthebestwaveletbase，theoptimaltransfo