Plustek V1.4 User Manual page 34

Chapter IV
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 color
dithering. Hint: We suggest leaving the Descreen option checked at
all times. It
Advanced Menu Item
The Advanced menu item has 3 options: Enhance,
Preferences and Monitor Gamma. The items located under the
Advanced menu are intended for user
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
Histogram, Tone Map and Gamma Data. Many image-editing
programs already have these features. However, if the need arises
to adjust the color level of your scanned images, then enter
preferences and perform the following adjustments. Note: Before
adjusting the Histogram, Tone and Gamma, 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 similar
frequencies. Make adjustments to the histogram only when the
color balance of your scanned image does not match the original
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the best filtering method for most practices.
who are familiar with
color correction options: