Epson ES-1200C - Manual (Page 75)

The output resolution determines how many pixels are used
for scanning and reproducing an image. Resolution is
measured in units of dpi (dots per inch), spi (samples per inch),
or ppi (pixels per inch). (AU are equivalent units of measure.)
As the resolution value increases, the image is read and
reproduced in finer detail. At 600 dpi, for example, an image of
one square inch is represented by 360,000 dots.
The 29 resolution settings allow you to choose the best
resolution for most types of printers. The settings available are
and 2400 dpi. To find a matching resolution for your particular
output device, follow the guidelines in Chapter 2.
Size of scale
The size or scale function allows you to reduce or enlarge the
size of the output image. The value can be set in the range of
50% to 200% in increments of 1%.
When the size is set to lOO%, the image is scanned at the actual
size for the current resolution. The size values determine the
vertical and horizontal lengths of the image. When the size is
set to 200% the image is enlarged four times the original size.
When the size is set to 50%, the image size is reduced to one
fourth of the original size.
The size function affects the number of dots scanned. An image
scanned at 180 dpi and 200% has the same number of dots as
an image scanned at 360 dpi and 100%.
To enlarge or reduce the image size, use the scanner’s size
function through your software at the time of scanning. Avoid
increasing the image size after scanning because the image
quality deteriorates. The default size value is 100%.
A-4 Appendix