Canon IMAGERUNNER 2530, Руководство по обслуживанию

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Technology > Original Exposure System > Controls > Image Processing
Technology > Original Exposure System > Controls > Image Processing
Image Processing
Overview
Major specifications and functions of the image processing system are as follows:
- CMOS (image sensor) Number of lines: 1
Number 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 relay PCB
CMOS
sensor
Analog image processor
Digital image processor
Shading
processing
Analog
image
processing
A/D
conversion
Contact image
sensor (CIS)
Controller
■
●
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Functions of the image processing system are summarized below.
- Reader relay PCB:
CMOS sensor drive, analog image processing, A/D, conversion, and shading correction
The reader relay 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 conversion
2)Digital image processing
- Shading correction
Target
value
CMOS sensor (1 line)
Analog image signal
Analog image
processing
- Gain correction
- Offset correction
A/D
conversion
CMOS sensor
drive control
CMOS sensor
control signal
Gain
correction
data
Digital
image
signal
IC1
10
Digital image
signal
8
Reader relay PCB
Contact image sensor (CIS)
J554
RAM
Shading correction
IC2
Serial
communication
I/F
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