CHAPTER 2 NEW FUNCTIONS
2-86
COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
5 Image Processing System (iR7200)
5.1 Outline
The major functions of the image processing system are as follows:
• CCD (image sensor)
Number of lines: 1
Number of pixels: 7450
Size of pixel: 4.7 × 4.7 µm
• Shading Correction
Shading adjustment: executed in service mode
Shading correction: executed for each copy
• Auto Density Adjustment (AE)
Executed for each line in main scanning direction.
The image processing system consists of the following functional blocks:
F02-501-01
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/AP PCB
Reader controller PCB
CCD
A/D
conversion
Shading processing
Analog
image
processing
Analog image processing block
Controller unit
Digital image processing block
Auto density
correction (AE)
To Next Page
Loading...
Need help?
General
