相機的基本原理.docx

数碣相檄的基本原理1.戟:件的基本知l三:2.thetheoryoftheDigitalCameraZPCCamera<1>BlockDiagramofPCCamerawithCCD/CMOSSG1,SG2,OFDXREMARKS:VD=VerticalDriverTG=TimerGeneratorThreemodescurrentspecificationSuspendModeCurrent<500uA(Poweroff,DSPSleep)OperationModeCurrent<500mA(Poweron,DSPWork,AllICwork)WaitModeCurrent<100200mA(Poweroff,DSPWork)<2>CMOSSensor=CCD+TG+ADHsincandVsinc日寺IW信虢CMOS和CCD的国别：a.CMOS的Sensitivity比CCD低.b.尺寸大小：同一Resolution下,CMOS的面稹要比CCD大.c. Noise:CMOS的Noise要比CCD大.d. OperationVoltage:CMOS3.3V,CCD(+15V,-9V)<3>DSP(ASlC)a.theblockdiagramofDSPImageProcessorJPEGEngineUSBInterfaceTGb.ImageProcessorWhiteBalance(ColorCorrection)<4>.CCDType分J2凝PSTypeandILTypePS=ProgressiveScanningIL=InterlaceScanning