COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001CHAPTER 3 IMAGE PROCESSING SYSTEM3-1 R1 OutlineThe major functions of the image processing system are as follows:[1] CCD (image sensor)Number of lines: 1Number of pixels: 7450Size of pixel: 4.7 × 4.7 μm[2] Shading CorrectionShading adjustment: executed in service modeShading correction: executed for each copy[3] Auto Density Adjustment (AE)Executed for each line in main scanning direction.The image processing system consists of the following functional blocks:F03-100-01Each of the PCBs used in the image processing system has the following functions:[1] CCD/AP PCB. Drives the CCD, performs analog image processing, performs A/Dconversion.[2] Reader controller PCB. Performs shading correction, performs auto density adjustment(AE).CCDCCDPCB Reader controller PCBA/Dconve-rsionShading processingAnalogimageprocessingAnalog image processing blockController unitDigital image processing blockAuto densitycorrection (AE)
