Brightness

This function allows you to adjust the image brightness, making it lighter or darker. There are two Brightness modes, Automatic and Manual, and three preset modes, Darken, Norm, and Lighten.

Select the Manual radio button in the Brightness group box. You can adjust the brightness setting by dragging the Brightness sliding control bar. Select a value from 1-255. The default is 128. The smaller the number, the darker the image. You also can click on the Darken, Norm, and Lighten buttons to adjust the brightness setting. Scan the document and check the brightness.

∙Manual—allows you to increase or decrease the brightness setting.

∙Automatic—sets brightness according to the scanning resolution.

NOTE: Refer to the section entitled “Binary Mode Automatic Threshold” for information about setting automatic brightness by Binary mode.

∙Darken—sets a low brightness value (51), which is better for scanning light originals.

∙Norm—sets an average brightness value (128).

∙Lighten—sets a high brightness value (205), which is better for scanning dark originals.

Brightness 51

Brightness 128

Brightness 205

A darker setting is recommended for blurred character documents. With a brighter setting, background noise in a color document disappears.

A-63055 December 1999

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