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1、中文摘要基于相位編碼技術(shù)的計(jì)算成像方法研究像效果。以上兩種成像系統(tǒng)均可突破傳統(tǒng)成像系統(tǒng)信息總量受空間-帶寬積的限制，可實(shí)現(xiàn)信號(hào)的低分辨率采樣，高分辨率恢復(fù)。頻譜面相位編碼成像采樣率在25%左右，而相位編碼隨機(jī)投影成像理論上也可實(shí)現(xiàn)25%的采樣率成像。但本文采用線掃描的方式，應(yīng)用了一個(gè)維度的稀疏度，進(jìn)行了成像模擬，結(jié)果表明，對(duì)于復(fù)雜圖像，采樣率在50%時(shí)，就可以取得較好的成像效果，對(duì)于信號(hào)稀疏度較大的情況,采樣率可以更低。同時(shí)，通過仿真發(fā)現(xiàn)，在不考慮噪聲的前提下，該成像方法所復(fù)原的圖像空間頻率響應(yīng)曲線(SFR)，在中高頻段
2、的響應(yīng)率高于傳統(tǒng)成像的衍射極限。數(shù)值仿真驗(yàn)證了上述兩種成像方法的可行性，特別是簡(jiǎn)化后的相位編碼板，其成像效果同樣良好，具有一定的實(shí)際應(yīng)用價(jià)值。關(guān)鍵詞：計(jì)算成像；相位編碼；壓縮；圖像重構(gòu)；高分辨率作者:孫建超指導(dǎo)老師:許峰II基于相位編碼技術(shù)的計(jì)算成像方法研究英文摘要StudyofcomputationalimagingbasedonphaseencodingtechniqueAbstractCurrently,therequirementforopticalimagingdetectionisgettinghighera
3、ndhigherinmanyareas.Gettinghigh-definitionandhigh-resolutionimageisanimportantmeansoftargetrecognitioninmanyfields.Withthedevelopmentofopticaltechnology,especiallythegreatprogressofdetectortechnologymakesitpossibletoobtainhigh-qualityimage.However,high-qualityima
4、geisaccompaniedbythegrowthofstorageandprocessingresources,atthesametimethedemandofopticalparametersismoreandmorestrict.Insomespecificareas,suchasaerospaceandonlinetestingofproductionlineswherehardwareandsoftwareresourcesisverylimited,thecontradictionbetweenhigh-q
5、ualityimageswithlimitedresourcesisparticularlyprominent.Themodeoftraditionalopticalimagingistogetthevisibleimageofobjective,whichneedstheopticalimagingsystemtoobtainahigh-qualityandvisibleimageatthetimeofsampling,imageprocessingisonlyforimagede-blurring.Inotherwo
6、rds,theopticalimagingsystemandimagerestorationarenotasunifiedcompletesystem,resultinginagreatwasteofresources.Underthisbackground,inthispaperwemakeacomprehensiveoptimizationbycombiningtheopticalsystemwithcomputerdigitalimageprocessing.Increasinganopticalencoderde
7、viceintheconventionalopticalimagingsystem,directlyencodingtheopticalinformationwiththephase-encodetechnology,thansamplingbydetector,wecangethigh-qualityandvisibleimageafterimagereconstruction.Unliketraditionalimagingmethods:“firstsampling,postprocessing”,thenewca
8、lculationimagingmethodsinvolvedinthispaperare“firstprocessing,thensampling,andrecovering”.Weconsidertheopticalsystemaspartofsignalprocessingsystem,detectorsamp
