Ricoh Aficio IS420 Manuel de l'utilisateur - Page 42
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Image Scanner User's Manual
¡ Binary filter
Function:
Usage:
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03_IS430-BODY
You can use 4 binary filters; noise elimination, smoothing, thickening black lines
and edge extraction in binary scanning.
Noise elimination:
Smoothing:
Thickening black lines: Thickens thin lines.
Edge extraction:
For example, use filters at following cases.
Noise elimination:
Smoothing:
Thickening black lines: Use this filter when scanning thin lines or characters.
Edge extraction:
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Eliminates independent black or white dots.
Flattens uneven dots.
Extracts outlines of the image.
Use this filter when scaninng a document which is copied
several times. Black dots in a white area and white dots in a
black area will be eliminated.
not filtered
If edges of a scanned image are uneven, scan it with this
filter again. Edges will be even.
not filtered
not filtered
Use this filter if you need outlines of an image for design
etc.
not filtered
filtered
filtered
filtered
filtered
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