Chapter 44-12T-4-6F-4-25Functions of the image processing system are summarized below.T-4-7The reader controller PCB is used to process images on a line-by-line basis. Its major functions are as follows:1)Analog image processing- CMOS sensor drive- CMOS sensor output gain correction and offset correction- CMOS sensor output A/D conversion2)Digital image processing- Shading correctionF-4-264.3.6.2 CMOS Sensor Drive 0010-4259iR2016J / iR2016 / iR2020 / / iR2016i / iR2020iThe CMOS sensor used in this machine is a 1-line linear image sensor consisting of 7488 photocells. After completion of photoelectric conversion in the light-receiving block, the signals are output to the AP circuit in the reader controller PCB in parallel for each channel (total eight channels) of the CMOS sensor array.F-4-27- CMOS sensor Number of lines: 1Number of pixels: Total 7488 (incl. 7176 effective pixels)Pixel size: 32 x 46.9 um- Shading correction Shading correction: Made for each job.Shading adjustment: Made in the Service mode.- Reader controller PCB CMOS sensor drive, analog image processing, A/Dconversion, and shading correctionReader controller PCBCMOSsensorAnalog image processor Digital image processorShadingprocessingAnalogimageprocessingA/DconversionContact imagesensor (CIS)ControllerTargetvalueCMOS sensor (1 line)Analog image signalAnalog imageprocessing- Gain correction- Offset correctionA/DconversionCMOS sensordrive controlCMOS sensorcontrol signalGaincorrectiondataDigitalimagesignalIC110Digital imagesignal8Reader controller PCBContact image sensor (CIS)J309RAMShading correctionIC2SerialcommunicationI/FCMOS sensor 1CMOS sensor 4 CMOS sensor 3HL L HH L HL H H LoutputLight receiving block
