Ricoh ISO1 Operation Manual - Page 72
Binary filter
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SCANNER FEATURES 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). A-14
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