Toshiba e-STUDIO453 Service Manual page 148

Image of an original placed on the original table is scanned by the optical system. The CCD (Charge
Coupled Device) reads the optical image signals and converts them into the electrical signals. The
electrical signals are amplified and undergo analog-to-digital conversion, then are changed into digital
signals. Shading correction (correction of variance in CCD elements and the light source) is performed
and the digital signal is output as an image signal from the scanning section.
CCD
7
The image processing section inputs the image signal from the scanning section and applies various
image processing on the signal, then transmits the output result to the writing section.
Images are processed by the SLG board and LGC board in this equipment. The image signal read in
the scanning function is processed in SLG board and the printer image signal is processed in the SYS
board.
e-STUDIO350/352/353/450/452/453
IMAGE PROCESSING
Signal amplifi- A/D conver-
cation sion
Fig. 7-102
7 - 2
05/11
Shading correc-
tion
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
to image
processing
section