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1、中文摘要基于相位编码技术的计算成像方法研究像效果。以上两种成像系统均可突破传统成像系统信息总量受空间-带宽积的限制，可实现信号的低分辨率采样，高分辨率恢复。频谱面相位编码成像采样率在25%左右，而相位编码随机投影成像理论上也可实现25%的采样率成像。但本文采用线扫描的方式，应用了一个维度的稀疏度，进行了成像模拟，结果表明，对于复杂图像，采样率在50%时，就可以取得较好的成像效果，对于信号稀疏度较大的情况,采样率可以更低。同时，通过仿真发现，在不考虑噪声的前提下，该成像方法所复原的图像空间频率响应曲线(SFR)，在中高频段
2、的响应率高于传统成像的衍射极限。数值仿真验证了上述两种成像方法的可行性，特别是简化后的相位编码板，其成像效果同样良好，具有一定的实际应用价值。关键词：计算成像；相位编码；压缩；图像重构；高分辨率作者:孙建超指导老师:许峰II基于相位编码技术的计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
