Image Processing Control - Canon DR-2580C Service Manual

CHAPTER 2 FUNCTION & OPERATION

2. Image Processing Control

Figure 2-402 shows the block diagram of
the image processing in the main body.
"This machine"
CIS PCB
front
CIS PCB
back
2-12
Control PCB
Analog processor
· Offset adjustment
· Gain adjustment
· A/D conversion
"Computer"
Shading correction
Color Grayscale
Color
correction
(3-dimensions)
Data after shading correction
1-dimensional gamma correction
Data after image processing
Figure 2-402
COPYRIGHT © 2005 CANON ELECTRONICS INC.
Data controller
· LED light control
· Resolution
conversion
· 12bit→8bit
USB interface
Binary
Edge emphasis
Binarizing
"Flatbed"
Option
Other processing
· Size detection
· Black border
removal
· Binder hole
removal
· Others
CANON DR-2580C FIRST EDITION APR. 2005