Plustek V1.2, User Manual

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also increases contrast by making dark edges darker and
surrounding light edges lighter.
Sharpen More : see Sharpen.
Descreen applies filtering to images that contain moiré
patterns (or herringbone). A moiré pattern is created from
scanning pictures in magazines, or printed material that use
colour dithering. Hint: We suggest leaving the
Descreen
option
checked at all times. It is the best filtering method for most
practices.
Advanced Menu Item
The Advance menu item has three options: Enhance ,
Preferences and Monitor Gamma . The items located under the
advance menu 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.
Enhance
Enhance pops-up TWAIN’s colour correction options:
Histogram , Tone Map and Gamma Data . Many image-editing
programmes already have these features. However, if the need
arises to adjust the colour level of your scanned images, then
enter
Preferences
and perform the following adjustments. Note:
Before adjusting the Tone , Gamma and Histogram , perform a
Prescan
so you can view the changes before you scan an image.
Histogram is a representation of statistical data by
rectangles: widths represent class intervals and heights represent