Image Processing - Canon imageRUNNER 2270 Service Manual

5.3.6 Image Processing

5.3.6.1 Outline
The following shows the major specifications and functions of the machine's image
processing system:
CCD
Shading correction
Contact image
sensor (CIS)
CCD
The following shows the functions of the PCBs used by the machine's image processing
system:
Reader controller PCB
The machine uses the reader controller PCB to process images for every single image line;
specific functions are as follows:
1) Analog Image Processing
number of lines: 1
Number of pixels: Total 7488 (Number of effective
pixels: 7180)
size of pixel: 32 x 46.9 ym
shading correction: executed for each job
shading adjustment: executed at power-on
Reader controller PCB
Analog image
processing block
Analog
A/D
image
conversion
processing
T-5-8
Digital image
processing block
Shading
processing
F-5-25
T-5-9
CCD drive, analog image processing, A/D
conversion, shading correction
Chapter 5
0006-5930
Controller block
5-25