相機的基本原理.docx

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1、数碣相檄的基本原理1.戟:件的基本知l三:2.thetheoryoftheDigitalCameraZPCCameraBlockDiagramofPCCamerawithCCD/CMOSSG1,SG2,OFDXREMARKS:VD=VerticalDriverTG=TimerGeneratorThreemodescurrentspecificationSuspendModeCurrent500uA(Poweroff,DSPSleep)OperationModeCurrent500mA(Poweron,DSPWork,AllICwork)WaitModeCurrent100200mA(Power

2、off,DSPWork)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)DSP(ASlC)a.theblockdiagramofDSPImageProcessorJPEGEngineUSBInterfaceTGb.ImageProcessorWhiteBalance(ColorCorrection).CCDType分J2凝PSTypeandILTypePS=ProgressiveScanningIL=InterlaceScanning