Image Processing Control - Canon imageFORMULA P-208 Service Manual With Parts Catalog

2. Image Processing Control

A block diagram of the image process-
ing is shown below.
CIS unit
(upper)
CIS unit
(lower)
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Control PCB
Analog processor
• Offset adjustment
• Gain adjustment
• A/D conversion
Computer
Shading correction
Color
Color correction
(three-dimensional)
Bleed-through reduction (when on)
One-dimensional gamma correction
Edge enhancement
Color Grayscale
Data after image processing
Figure 2-402
CANON P-208 FIRST EDITION
CHAPTER 2 FUNCTION & OPERATION
Scanner controller
• LED light control
• 12 bit 8 bit
USB I/F
Data reordering
Color / black &
(when on)
white detection
Resolution
conversion
Grayscale
Binarization
Binary
Other processing
• Auto-size
detection
• Deskew
• Image rotation
• Skip blanks
• File creation
• Other
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