Image Processing - Canon imageRUNNER 2530 Service Manual

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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.
Contact image
Reader relay PCB
sensor (CIS)
Analog image processor
CMOS
sensor
Analog
A/D
image
conversion
processing
2 Technology > Original Exposure System > Controls > Image Processing
Digital image processor
Controller
Shading
processing
F-2-26 F-2-26
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
Contact image sensor (CIS)
CMOS sensor (1 line)
Analog image signal
Gain
correction
IC1
data
Analog image
processing
A/D
Digital
- Gain correction
conversion
image
- Offset correction
signal
10
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Reader relay PCB
IC2
CMOS sensor
CMOS sensor control signal
drive control
Serial
Target communication
value I/F
RAM
J554
Digital image
signal
Shading correction
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F-2-27 F-2-27
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