Ricoh B089 - Ipu (Image Processing Unit)

IMAGE PROCESSING
SM 2-9 B089/B093
Detailed
Descriptions
2.3.4 IPU (IMAGE PROCESSING UNIT)
Overview
The image data from the SBU goes to the IPU (Image Processing Unit) ICs on the
SBCU board, which carry out the following processes on the image data.
IPU-A
• Auto shading
• Pre-filtering
• Magnification
• Test pattern generation
IPU-B
• Filtering (MTF and smoothing)
• ID gamma correction
• Grayscale processing
• Binary picture processing
• Error diffusion
• Dithering
Video Controller
• Video path control
The image data then goes to the LD driver (LDD).
IPU
LDD
SBU
FCI
VCU
Fax (FCU Board)
IPU-B
Video
Controller
Printer/Scanner
SIMAC
HDD
Controller
PCI BUS
IPU-A
B027D507.WMF