Genius VividPro II, User Manual

Page: 54 / 91

Chapter IV. The TWAIN Interface
47
Remember, you can immediately view the effects
of any changes you make in the Prescan Area by first
prescanning the image.
Clicking on the Default near the bottom of the
window causes the gamma values in all color channels
to be reset at 1.00.
Note: By changing the gamma values you affect
the image data, and influence how the image
displays on your computer monitor, and printer.
Scanning Tips
Determining the Correct Amount of
Resolution
•
More is not always best . Determine what your
final application will be BEFORE you scan. In
many cases a highly resolution image will do
nothing more but dramatically increase the file
size, take up more disk space, and slow down the
process.
•
Internet Applications : For e-mailing color photos
or pasting images on websites, a resolution of 75
dpi is the best choice. This is because the actual
viewable resolution of the average monitor is 72
dpi.
•
Printing to Ink Jet Printers : Check your printer
documentation for recommended printer resolution
settings. We recommend ranges between 75-300
dpi in general. Only use a higher scanning
resolution (301 dpi and above) for smaller images
when detail must be captured in a small area
because it will be enlarged later.
•
Laser and Commercial Printers : When printing
an image to a laser printer or commercial printing
press, it is important to understand the process in
terms of line screen (a.k.a., LPI). Line screens are
the number of screen lines per inch when an image
is halftoned. Halftoning is the process of breaking
the image down into a series of dots to reproduce
continuous-tone art when printing on a press. A
general rule when printing in one of these two