Canon DR-1210C Service Manual page 42

CHAPTER 2 FUNCTION & OPERATION
Corresponding to the density of each
picture element, the CCD PCB outputs an
analog signal to the analog processor on the
main PCB.
The analog processor adjusts the offset
and the gain and executes A/D conversion.
Thereby the analog signal is converted to a
16bit digital signal. Then the image data is
output to the controller, where it is tentatively
saved in the SDRAM. This 16bit signal is
converted to an 8bit signal at this time.
The image data is then output to the
computer via the USB interface.
All the image processing executed by
this machine is as described above. Any
other image processing is carried out inside
the computer. Refer to the Figure 2-402 for
details. Inside the computer, the image is
processed as set by the user.
In case of a resolution of 300 dpi or less,
however, this machine converts the resolu-
tion from 600 dpi to 300 dpi. If smoothing is
specified, the resolution is kept at 600 dpi.
2-14
COPYRIGHT © 2006 CANON ELECTRONICS INC. CANON DR-1210C FIRST EDITION FEB. 2006