Image Processing; Outline - Canon iR2422 series Service Manual

4.3.6 Image Processing

4.3.6.1 Outline

Major specifications and functions of the image processing system are as follows:
- CMOS sensor
- Shading correction
Contact image
sensor (CIS)
Functions of the image processing system are summarized below.
- Reader controller PCB
0.5mm 0.5mm
A B C
Stream
reading
glass
Number of lines: 1
Shading correction: Made for each job.
Shading adjustment: Made in the Service mode.
Reader controller PCB
Analog image processor
CMOS
sensor
Analog
image
processing
Platen roller
Lens
Contact image sensor
LED
(CIS)
F-4-25
Number of pixels: Total 7488 (incl. 7176 effective pixels)
Pixel size: 32 x 46.9 um
Digital image processor
A/D Shading
processing
conversion
F-4-26
CMOS sensor drive, analog image processing, A/D
conversion, and shading correction
Chapter 4
Controller
0020-4240
4-17