Canon CanoScan FB 1200S User Manual page 53

How the Output Resolution and Image Size Relate
To understand the relationship between the two settings, see the
example below of an image scanned in the file mode at different
output resolutions.
Input Resolution (dpi)
Output Resolution (dpi)
Image Size (pixels)
Image Size (cm)
File Size (KB)
* These numbers are approximate and may differ from actual results.
Example with the Output Resolution Changed from 300 to 600 dpi.
An output resolution of 600 dpi signifies that one linear inch of an
image output to a printer or to a monitor will contain 600 dots (=
pixels). Since the image was scanned at a density of 300 dots per
inch and is being output at twice that density, the image size is cut
in half. You are, in effect, placing more of the image in less space.
Input Resolution of
300 dpi
Scanned at 300 dots per inch
Input Resolution of
300 dpi
Scanned at 300 dots per inch
Keep this relationship in mind when you need to pay attention to
the size of the output image.
Example with the
Output Resolution
Changed to 600
300
300
300 x 200
2.54 x 1.69
180
Output Resolution of
300 dpi
Output at 300 dots per inch
Output Resolution of
600 dpi
300 dots per inch
Output at 600 dots per inch
FilmGet FAU User's Guide
Scanning
600
300
300 x 300
1.27 x 0.84
180
The size does not
change between
input and output
The output image
is 1/2 the size of
the input image
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