Ipu (Image Processing Unit); Overview - Gestetner B003 Service Manual

IMAGE PROCESSING

6.5.4 IPU (IMAGE PROCESSING UNIT)

Overview

SBU
LDDR
LD1
FCI
LD2
GAVD
The image data from the SBU goes to the IPU (Image Processing Unit) IC on the
BICU board, which carries out the following processes on the image data:
1. Auto shading
2. Filtering (MTF and smoothing)
3. Magnification
4. γ correction
5. Grayscale processing
6. Binary picture processing
7. Error diffusion
8. Dithering
9. Video path control
10. Test pattern generation
The image data then goes to either the LDDR or the HDD depending on the
selected copy modes.
B003/B004/B06/B007
SIB
BICU
IPU
6-18
Controller
HDD
B004D520.WMF
SM