Ipu Block Diagram - Gestetner B147 Service Manual

6.4.3 IPU BLOCK DIAGRAM

SBU
•
Shading Correction
•
Picture Elemnet Correction
•
Scanner γ Correction
•
Filter
ASIC1
•
ADS
• Image Separation
ASIC3
IPU
Shading Correction
Auto shading compensates for the possible differences in the amount of light at the
edge and center of a scanned image caused by the scanner lens, or variations
among pixels of the CCD.
SM
•
Color Correction
•
Main Scan Magnification
•
Printer γ Correction
ASIC2
• Gradation Processing
ASIC4
6-27
IMAGE PROCESSING
I/F
BCU
Controller
Option
B147/B149/B190
Controller
FCU
B146D931.WMF