Avision AVA3 400 - Manual (Page 33)

Scanner Operation
4-6
4.2.2 DETERMINING YOUR RESOLUTION
A good control of the resolution results a satisfactory detail of an
image that scans. The resolution is measured by dots per inch(dpi).
Normally, the greater the dpi number, the higher the resolution and
the image file size. Be aware that the greater resolution takes more
time, memory and disk space, therefore, up to a certain degree of
dpi, the resolution will not visually be improved, on the contrary, it
makes your files more unmanageable.
Figure 4-5 Resolution Control
Resolution: 50 dpi Resolution: 100 dpi