Genius VividPro II, Руководство пользователя

Страница: 47 / 91

Chapter IV. The TWAIN Interface
40
Detailed Prescan
Clicking this checkbox will prescan the image with
a resolution of 75 dpi rather than the normal 50 dpi
used in prescanning. Doing this allows the prescanned
image to be shown in much more detail.
Equalized Colors
This command is only available when scanning
photo negatives. When this box is checked, the
TWAIN program finds the brightest and darkest
values in the image and averages all the brightness
values so that the darkest value represents black and
the brightest value represents white.
Unit
This area is used to choose the measurement units
to be used in the Prescan Area.
Advanced Windows for Color
Correction
The Advanced window has 3 other tabs:
Histogram, Tone Map and Gamma used for the
TWAIN color correction options. These items are
intended for users who are familiar with image editing
tools and how they affect images. If you are just
learning how to scan, then we strongly recommend not
using these features until you become familiar with
your scanner and its terminology. Many image-editing
programs already have these features. However, if the
need arises to adjust the color level of your scanned
images, then click on the appropriate tab and perform
the adjustments.
Note: Before adjusting the Histogram, Tone Map
and/or Gamma, perform a PRESCAN so you can
view the changes before you scan.
Color Channels
Along the top of the Histogram, Tone Map and
Gamma windows are the color channels (Figure 13).