Microtek 3700 User Guide

This section covers basic scanning concepts. If you already have 

basic scanning knowledge, you may skip this section.

 

 

 

 

 

A rule of thumb for choosing the right Quality Factor is, for images 

with printing screens less than or equal to 133 lines per inch, set 

Quality Factor to 2; above 133 lines per inch, set it to 1.5; contone 

printer (continuous tone printer, such as dye-sublimation printer), 

set it to 1.0

If you're outputting images to a monitor (such as doing multimedia 

work), you need not scan images higher than 72 ppi, as monitors 

are capable of only showing images up to 72 ppi. A higher-

resolution image will not be any clearer on the monitor and will 

simply create larger files.

Remember that the higher the resolution, the larger your image file 

will be. For instance, an 8.5" x 11" color photograph scanned at 75 

ppi takes up about 1.6 megabytes (MB). Doubling resolution to 150 

ppi will increase the file size four times - to approximately 6.3MB! 

Going to 300 ppi will increase file size to 26.2MB.

What you need to do then is to select the lowest possible resolution 

that still gives you good image quality in order to keep file sizes 

manageable.