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3.16
Descreen
This selection is used to eliminate moire patterns from the output image.
Moire occurs as a result of differences in the screen pattern used to print
document and the scanner electronics. Moire may appear as checkered
patterns bands or dots. Descreen preprocessing can minimize the transfer of
moire patterns into your image file.
Besides a default setting of No Descreen, The Descreen selector provides
three grades of descreen preprocessing as described below.
No Descreen
No descreening.
Art print (175 lpi)
The Art print selection is used to smooth the fine dot pattern found in high
quality art prints and magazines made in resolution higher than 200 dpi.
Magazine (133 lpi)
The Magazine selection is used to smooth the fine dot pattern found in
glossy magazines made in resolution higher than 200 dpi.
Newspaper (88 lpi)
The Newspaper selection is used to smooth the coarse grain pattern commonly
found in newspaper images made in resolution higher than 200 dpi.
Invert Image
This function inverts all the tone values, providing a photographic negative
of the original. This effect is similar to using the Tonal Map to tonally invert
the image.
Normal image Invert image
Scanning