Ipu (Image Processing Unit); Overview - Gestetner A265 Service Manual

IMAGE PROCESSING

2.2.4 IPU (IMAGE PROCESSING UNIT)

Overview

S B U
LDD
L D
V C U
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. Scanner gamma correction
3. Filtering (MTF and smoothing)
4. Magnification
5. ID gamma correction
6. Grayscale processing
7. Binary picture processing
8. Error diffusion
9. Dithering
10. Video path control
11. Test pattern generation
The image data then goes to the LD driver (LDD).
A265/A267
CÓPIA NÃO CONTROLADA
BICU
FCI
CÓPIA NÃO CONTROLADA
I P U
Memory
Controller
D R A M
2-8
Fax Controller
S c a n n e r
Controller
Printer Controller
E M B
A265D503.WMF
SM