欢迎来到天天文库
浏览记录
ID:53570458
大小:948.38 KB
页数:8页
时间:2020-04-18
《基于GPU和分块技术的巨幅影像快速傅里叶变换算法研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第34卷,第2期光谱学与光谱分析Vol畅34,No畅2,pp498‐5042014年2月SpectroscopyandSpectralAnalysisFebruary,2014ResearchonFastFourierTransformsAlgorithmofHugeRemoteSensingImageTechnologywithGPUandPartitioningTechnology1,3,42,3倡1倡4YANGXue,LIXue‐you,LIJia‐guo,MAJun,212ZHANGLi,YANGJan
2、,DUQuan‐ye1.InstituteofRemoteSensingandDigitalEarth,ChineseAcademyofSciences,Beijing 100101,China2.ChineseAcademyofSurveyingandMapping,Beijing 100830,China3.BeijingSiweiSpatialDataTechnologyCo.,Ltd.,Beijing 100039,China4.SchoolofComputerandInformationEnginee
3、ring,HenanUniversity,Kaifeng 475004,ChinaAbstractFastFouriertransforms(FFT)isabasicapproachtoremotesensingimageprocessing.Withtheimprovementofcapacityofremotesensingimagecapturewiththefeaturesofhyperspectrum,highspatialres‐olutionandhightemporalresolution,ho
4、wtouseFFTtechnologytoefficientlyprocesshugeremotesensingimagebecomesthecriticalstepandresearchhotspotofcurrentimageprocessingtechnology.FFTalgorithm,oneofthebasicalgorithmsofimageprocessing,canbeusedforstripenoiseremoval,imagecompression,im‐ageregistration,e
5、tc.inprocessingremotesensingimage.CUFFTfunctionlibraryistheFFTalgorithmli‐brarybasedonCPUandFFTW.FFTWisaFFTalgorithmdevelopedbasedonCPUinPCplatform,andiscurrentlythefastestCPUbasedFFTalgorithmfunctionlibrary.Howeverthereisacommonproblemthatoncetheavailableme
6、moryormemoryislessthanthecapacityofimage,therewillbeoutofmemoryormemo‐ryoverflowwhenusingtheabovetwomethodstorealizeimageFFTarithmetic.Toaddressthisproblem,aCPUandpartitioningtechnologybasedHugeRemoteFastFourierTransform(HRFFT)algorithmisproposedinthispaper.
7、ByimprovingtheFFTalgorithminCUFFTfunctionlibrary,theproblemofoutofmemoryandmemoryoverflowissolved.Moreover,thismethodisprovedrationalbyexperimentcombinedwiththeCCDimageofHJ‐1Asatellite.Whenappliedtopracticalimageprocessing,itimproveseffectoftheimageprocess‐i
8、ng,speedsuptheprocessing,whichsavesthetimeofcomputationandachievessoundresult.KeywordsGPU;HRFFT;FFT;Remotesensingimage中图分类号:TP751 文献标识码:ADOI:10畅3964/j畅issn畅1000‐0593(2014)02‐0498‐07datacomputat
此文档下载收益归作者所有