Brightness; Contrast; Watermark - Plustek eScan A350 User Manual

Brightness

Brightness is the overall lightness of the image. Move the slider left or right to darken
or lighten the image. Adjusting the brightness level adjusts the tone of the pixels, without
changing the true color of the pixels.

Contrast

Contrast refers to the differences between the light and dark portions in the image. Move
the slider left or right to decrease or increase the contrast levels. Increasing the contrast
level emphasizes the difference between the lighter and darker portions of the image,
decreasing the contrast de-emphasizes that difference.

Watermark

Enable the use of Watermark to add a
visible mark on the scan documents. The
eScan network scanner allows Text or
Image/Picture configuration for such
function.
Select Use Picture to upload a desired
image. Please note, when using Image file
for your watermark overlay, we strongly
recommend that the image be no bigger
than 800x800 pixels. [Recommend size and format: 600x200pixels; PNG]
Tap on Position to select the desired
position. There are 9 positions to choose
from.
Select Use Text as the Watermark, enter
the desired text, adjust the desired
position, and adjust the Transparency,
Text Size and Text Angle from the slider.
17