34324.lamost光纖光譜圖像中宇宙射線的剔除

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文LAMOST光纖光譜圖像中宇宙射線的剔除姓名：王翀申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：信號(hào)與信息處理指導(dǎo)教師：葉中付20100401ABSTRACTLargeSkyAreaMultiObjectFiberSpectroscopyTelescope(LAMOST)islocatedatXinglongObservingStationofNationalAs訂onomicalObseⅣatoriesChlneseAcadem

2、yofSciencesAsalargefiberspectroscopytelescope，itcanpossesstnenlghestSpectrumacquiringrateintheworldLAMOSTisamilestoneintllehistoryofChineseastronomicalresearching1nnatufe，LAMOSTisacomplexsetofimagingsystemHence，plentyofi

3、mageprocessing齜gorithmsaresuitableheretobeusedtoprocessthespectroscopicCCD1magesJhere觥manyproblemsmayoccurredduringobservingAlltheseshouldbep‘oces8eQproperlyafterthatThispaperwillfocusontheinevitableproblemofcosmicrayhit

4、sinspectroscopicCCDimagesAnentroducingthespectroscopicCCDimagesandcosmicrayhitsindetailweproposeanovelmethodtejectcosmic—rayhitsbasedontemplatematcllingalgorithmThentheideaofgeneralpurposecomputationon伊aphichardwareisapp

5、lledt0speedupouralgorithmRadialbasisfunctioninterpolationisalsointroducedheretoachievebetterrestoringresultsInsmmary，themain、Ⅳorksaredescribedasfollows，lBasedonthedifferentprofilebetweenspectrumandcosmicrayKts，wep‘oVldea

6、newideatoidentifycosmicrayhitsInsteadofsearchingforcosmicrayhitsd1他ctIy，weconfirmthosepixelsbelongedtonormalspectmmflrstTllentheleRpixelsarethoseaffectedbYcosmicrayhitsZUsmgtheImprovedtemplatematching，weintroducetheproce

7、dureofrejectingcosmic。rayhitsstepbYstepTheexperimentsshowthatourmethodhasimpressiveperforms3ByintroducingthepopularideaofGPUcomputing，、ⅣeuseGPUtodotheworkofmatchingFinalresuItshoWSthatthecosttimeissho蹴dgreatly4Astheexten

8、sionoftemplatematching，templatesareusedt。r印airthepixelsafiectedbycosmicrayhitsWiththehelpofRBFinterp01ation，wecanobtainbetterrestorationresultsKeywords：LAMOSTSpectrumProcessing，CosmicrayHits，GeneralPurp。seComputationonGr