Canon imageFORMULA DR-C125 Service Manual page 38

CHAPTER 2 FUNCTIONS & OPERATION
Analog signals proportionate to the
density of each picture element are divided
by three and output in parallel to the analog
processor on the scanner PCB from the CIS
PCB. The resolution of the output data is
either 300 dpi or 600 dpi according to the
user settings.
The analog processor carries out offset
adjustment, gain adjustment, and A/D
conversion. Analog signals are converted
into 10 bit digital signals in the analog
processor. Then
transferred to the scanner controller and
converted from 10 bits to 8 bits.
After that, the image data is output to
the computer through the USB interface.
The computer performs the shading
correction and the
according to the user settings.
Since this machine
background, black frame removal and
punch hole removal are not necessary.
2-16
the image data
image processing
has a white
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is
CANON DR-C125 FIRST EDITION