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©
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 3 IMAGE PROCESSING SYSTEM
3-1 R
1 Outline
The major functions of the image processing system are as follows:
[1] CCD (image sensor)
Number of lines: 1
Number of pixels: 7450
Size of pixel: 4.7 × 4.7 µm
[2] Shading Correction
Shading adjustment: executed in service mode
Shading 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:
F03-100-01
Each 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/D
conversion.
[2] Reader controller PCB. Performs shading correction, performs auto density adjustment
(AE).
CCD
CCD
PCB
Reader controller PCB
A/D
conve
-rsion
Shading processing
Analog
image
processing
Analog image processing block
Controller unit
Digital image processing block
Auto density
correction (AE)
