Setting The Resolution And Magnification; Image Size - Canon CanoScan FB 1200S User Manual

Setting the Resolution and Magnification

The magnification of an image can be changed before scanning to accommodate
reproductions that are larger or smaller than the original. The settings can be changed
in increments of 1%.
1.38"/3.5cm
0.98"/2.5cm
Changing the magnification setting causes the resolution display on the control panel
to change correspondingly. This resolution setting is referred to as the "scanning
resolution."
Output Device Resolution= 720 dpi, Magnification= 100%
Magnification
Scanning Resolution
Hint
Magnification and Resolution
Why does the image size change with the magnification? Let us answer this
with an example using an "BJ (720 dpi)" output device. If you were to scan an
image with this device setting and set the magnification factor to 50%, the
scanning resolution will automatically change to 360 dpi. At this setting, the
image will be scanned at a resolution of 360 dpi and the output device will
convert this to 720 dpi, shrinking the size of the output in the process because it
will only have half the data with which to fill the space.
Magnification
50%
Scanning with horizontal/
vertical 2x magnification
Scanning at 200%
Scanning with horizontal/
vertical 0.5x magnification
Scanning at 50%
Magnification
changed to
Image size = 5"x5"
(12.7 x 12.7cm)
Scanned at
360 dpi
23
23
S T E P
2.76"/7cm
0.689"/1.75cm
0.492"/1.25cm
50%
The scanning resolution changes
accordingly.
Image size = 2.5"x2.5"
(6.35 x 6.35cm)
Output sevice
corrects to
720 dpi
2
1.969"/5cm