Ricoh A229 - Ipu (Image Processing Unit); Overview

IMAGE PROCESSING
2-23
SM A229
Detailed
Descriptions
2.3.4 IPU (IMAGE PROCESSING UNIT)
Overview
The image data from the SBU goes to the IPU (Image Processing Unit) IC on the
SBICU board, which carries out the following processes on the image data.
1. Auto shading
2. Text/Photo separation
3. Background/Independent dot erase
4. Filtering (MTF and smoothing)
5. Magnification
6.
γ
correction
7. Grayscale processing
8. Error diffusion
9. Dithering
10. Video path control
11. Test pattern generation
LD1
LD2
IPU
DRAM
SBU
SBICU
LDDR
HDD
GAVD
GA1
GA2
A229D580.WMF