基于相位解纏的激光等離子體沖擊波干涉條紋的圖像處理.pdf

1、南京理工大學(xué)碩士學(xué)位論文基于相位解纏的激光等離子體沖擊波干涉條紋的圖像處理姓名：鄭峰申請學(xué)位級別：碩士專業(yè)：光學(xué)工程指導(dǎo)教師：陸建20090519AbstractTheresearchoflaserinducedplasmashockwaveisanimportantbasictheoryinthefieldoflaserapplicationTheimageprocessingofinterferogramcollectedinthe

2、experimentisoneofthekeymethodstostudylaserinducedplasmashockwaveInthispaperMachZehnderinterferenceisusedtoconducttheresearchoflaserinducedplasmaevolutionaryprocessatfirstThen，thecollectedinterferogramisprocessedbyFourier

3、transformmethod，frequencydomainfiltering，inverseFouriertransformmethod，andphaseunwrappingThealgorithmofphaseunwrappingisstudiedatlastTheinterferogramoflaserinducedplasmashockwaveiscollectedinreal—timebythesystemcomposedb

4、yMach—Zehnderinterferencesystem，delaydevice，CCD，andcomputerThelasertargetandairtargetplasmainterferogramsatdifferentdelaytimeareobtainedseparatelyTheinterferogramoflaserinducedplasmashockwaveisprocessedbyprogrammingusing

5、Fouriertransformmethod，frequencydomainfiltering，inverseFouriertransformmethod，andphaseunwrappingAccordingtotheinterferogramswhosephasealewrapped，manyexistingalgorithmsarechosetoinvestigatetheinterferogramsinthispapersuch

6、asGoldsteinbranchcutalgorithm，unweightedleastsquarealgorithmandPCGalgorithmForthelargephasestepinshockwaveareaofthelaserplasmashockwaveinterferogram，theinterferogramcannotbeprocessedwellbytraditionalphaseunwrappingalgori

7、thmSo，onthebaseofclassicalalgorithm，analgorithmwhosenameis‘phaseunwrappingalgorithmbasedoncalculatingreliabilityofpixels’’isproposedinthispaperBycomparingtheresultswiththepreviousalgorithms，itisconcludedthatthisalgorithm

8、isbetterinprocessingtheinterferogramoflaserinducedplasmashockwaveTheresultsofthispaperprovideanewmethodtOinvestigatethephysicalparametersoflaserinducedplasmaKeyword：laserinducedplasmashockwave，Mach—Zehnderinterferencemet