20 June 2005
IMAGE PROCESSING
6-17
Detailed
Descriptions
6.5 IMAGE PROCESSING
6.5.1 OVERVIEW
SBU:
The SBU (Sensor Board Unit) converts the analog signal from the CCD to an
8-bit digital signal and sends it to the SIB.
SIB:
Relays image signals and controls the scanner.
BICU:
The BICU (Base Engine Image Control Unit) performs timing control and
command control. The IPU on the BICU processes auto shading, filtering,
magnification,
γ
correction, and gradation. The memory controller performs image
compression, decompression, and memory address control (for binary picture
processing mode only)
LD Unit:
Performs dual channel multi-beam exposure, multiple exposure, and
synchronous detection.
Controller:
Performs dual channel multi-beam exposure, multiple exposure, and
synchronous detection.
SIB
IPU
Drum
BICU
LDDR
Controller
SBU
CCD
HDD
FCI
LD
Controller
(GAVD)
SIB
M
o
th
er
B
oa
rd
LD
Driver
B195D903.WMF
