CCD的图像采集软件系统的设计与实现_硕士学位论文CCD的图像采集软件系统的设计与实现_硕士学位论文IIIimplement.Final,thetestofthesystem'shardwareandsoftware.Thetestresultsshowthatthedesignachievedtheacquistionfunctionandgoodperformance.Atthesametime,thesystemachievedtheexpectedacquisitionspeedandqualityofthecollectedimage.Keywords:Scanner,CCD,Man-machineinterface,Multithread,MemorymanagementIIABSTRACTTheMulti-CCDscannerswhicharewidelyusedinprinting,scientificresearch,medicalandotherfieldshaveimportantapplicationsinoptical-electronic-machineryintegrationequipment.Atpresent,withtherapiddevelopmentalotofindustriesneedtoarchivelargeformatmaterials.Therefore,thedemandforlarge-formatscannerisincreasing,whilepromotingthedevelopmentandproductionoflargeformatscanners.Themainworkofthelarge-formatscanneristoconverttheanalogsignaltothedigitalsignalwhichthecomputercanidentifyafterconvertingtheimage'sopticalsignaltotheanalogsignal.Inordertoscanlargeformatimages,aneffectiveapproachistocaptureimagesthroughmultiplesensors,thensplicetheimagetocompletethelarge-formatscanner'swork.ThescannerusefoursametypeCCDtocapturetheimagesthensplicethemintoone.WhilethefourCCDsscanasynchronouslytoaccomplishthephotoelectricconversionintheprocess.Themainworkofthispapercanbedividedintotwoparts,hardwareandsoftwaredesign.Thefirstpartisthehardwarework,afteranalyzingthelargeformatscanner'sworkingprincipleandhardwaresystem'sperformanceparametersthedevelopmentcontentandfocusesoftheworkoflarge-formatscannerhasbeendetermined.Thedeviceshavebeenselectedaccordingtotheparameters.ThenwefinishedthescannerhardwarecircuitdesignandFPGA'stimingdesignincludingthedriverandconfigurationofthedigital-to-analogconversionchip.Thisistheimportantfactortotheimagequality.Convertingtheopticalsignaltotheanalogsignallaidafoundationtoenhanceimagequalitywhichisthekeytolarge-formatscanning.Thesecondpartisabouttheuppersoftwaresystemdevelopment.Aboutthisthepaperintroducedthedemand,thedivisionofthefunctionalmodulesofthesoftwareandthethree-tierstructur