FUJITSU C150-E187-01EN - Manual (Page 45)

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Figure Advance dialog (Color)
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Shadow/Highlight
Shadow : The highlight allows the darkest part of the document to be controlled. The higher
the shadow value, the darker the image.
Highlight : The highlight allows the brightest part of the document to be controlled. The
higher the highlight value, the lighter the image.
Any levels on the document outside these settings are flooded (all 0 or 255), while the
interval between the shadow and highlight settings is equally divided into 255 levels, which
are used to create the output images. This means that if the shadow and highlight settings are
close to each other, the contrast for that interval in the scanned document will be very strong
(but with all other areas maximizing high or low).
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Contrast/Brightness
Contrast : Sets the contrast of light and shadow in a scanned image. Specify the contrast
with a number in the range of 1 (low [soft]) to 255 (high [sharp]). If this value is