Bell and Howell 500 FB, Руководство оператора

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SCANNER FEATURES
A-14
Binary filter
Function You can use the following binary filters for binary scanning:
Noise elimination - eliminates independent black or white dots.
Smoothing - flattens uneven dots.
Thickening black lines - thickens thin lines.
Edge extraction - extracts outlines of the image.
Usage Use these filters as shown below.
Noise elimination
Use this filter when scanning a document that has been copied several
times. Black dots in a white area and white dots in a black area are
eliminated.
Smoothing
When edges of a scanned image are uneven, scan the image again with this
filter to even out the edges.
Thickening black lines
Use this filter when scanning thin lines or characters.
Edge extraction
Use this filter when you want to obtain outlines of an image, (for design
purposes, for example).