Canon CanoScan FB 1200S User Manual - Page 23

Setting the Resolution and Magnification, Output Device Resolution= 720 dpi, Magnification= 100

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STEP 2 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 Scanning with horizontal/ vertical 2x magnification Scanning at 200% 2.76"/7cm 1.969"/5cm 0.98"/2.5cm Scanning with horizontal/ vertical 0.5x magnification 0.689"/1.75cm Scanning at 50% 0.492"/1.25cm 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% ª Magnification Scanning Resolution Magnification ª changed to 50% The scanning resolution changes accordingly. 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% Scanned at 360 dpi Image size = 5"x5" (12.7 x 12.7cm) Image size = 2.5"x2.5" (6.35 x 6.35cm) Output sevice corrects to 720 dpi 23 23

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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%.
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%
Setting the Resolution and Magnification
S T E P
2
The scanning resolution changes
accordingly.
Magnification
changed to
50%
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.
Scanning at 200%
Scanning at 50%
2.76"/7cm
0.689"/1.75cm
0.492"/1.25cm
1.38"/3.5cm
0.98"/2.5cm
1.969"/5cm
Magnification
50%
Scanned at
360 dpi
Image size = 5"x5"
(12.7 x 12.7cm)
Image size = 2.5"x2.5"
(6.35 x 6.35cm)
Output sevice
corrects to
720 dpi
Scanning with horizontal/
vertical 2x magnification
Scanning with horizontal/
vertical 0.5x magnification