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Chapter 5
5-21
2. Digital Image Processing
- shading correction
F-5-45
[1] 1st-half digital image signal
[2] 2nd-half digital image signal
5.3.6.2 Overview <iR7086>
0011-2248
The PCBs used in the image processing system have the following functions:
CDD/AP PCB: CCD drive, analog image processing, A/D conversion
Reader controller PCB: shading correction
F-5-46
1. Analog Image processing
- CCD drive
- CCD output gain correction, offset correction
- CCD output A/D conversion
F-5-47
Gain correction data
EEP-ROM
SRAM
CPU
CCD/AP
PCB
Reader controller PCB
20bit
8bit
Target
value
J101
J204
[1]
[2]
[1]
[2]
Shading correction
J102
J208
J202
20bit
8bit
CCD/AP PCB
Reader controller
PCB
CCD
A/D
conversion
Shading processing
Analog image
processing
Analog image processing block
Controller
block
Digital image processing block
CCD (1 line each for R, G, and B)
Analog image
signal
Analog image
process
- gain correction
- offset correction
A/D
conversion
CCD drive
control
A12V
A5V
J101
J204
J204
J102
J205
CCD control
signal
Gain correction
data
Digital image
signal
Reader
controller
PCB
Odd-numbered
pixel
Odd-numbered
pixels
Even-numbered
pixels
CCD/AP circuit
10
Even-numbered
pixel
Summary of Contents for IMAGERUNNER 7086
Page 20: ...Chapter 1 Introduction ...
Page 46: ...Chapter 2 Installation ...
Page 88: ...Chapter 3 Basic Operation ...
Page 94: ...Chapter 4 Main Controller ...
Page 116: ...Chapter 5 Original Exposure System ...
Page 165: ...Laser Exposure Chapter 6 ...
Page 175: ...Chapter 7 Image Formation ...
Page 231: ...Chapter 8 Pickup Feeding System ...
Page 287: ...Chapter 9 Fixing System ...
Page 312: ...Chapter 10 External and Controls ...
Page 346: ...Chapter 11 MEAP ...
Page 350: ...Chapter 12 RDS ...
Page 360: ...Chapter 13 Maintenance Inspection ...
Page 375: ...Chapter 14 Standards Adjustments ...
Page 407: ...Chapter 15 Correcting Faulty Images ...
Page 433: ...Chapter 16 Self Diagnosis ...
Page 460: ...Chapter 17 Service Mode ...
Page 559: ...Chapter 18 Upgrading ...
Page 583: ...Chapter 19 Service Tools ...
Page 588: ...APPENDIX ...
Page 615: ......