Xerox 4700 manual Brightness, Choosing brightness values, Main Panel Options

Main Panel Options

Some of the options in this panel may have advanced adjustment options on a different panel in this section. When the Advanced configuration mode is selected, an icon will appear next to those features which have adjustment options on another tab. Click on one of the icons to go to the area of the interface where the adjustment options are located.

Click on a link below to go to the appropriate page in this section for instructions on adjusting the option that is displayed on the Main tab.

See Advanced Panel Options on page 159

•Despeckle

Brightness

Brightness is the overall lightness of the image. Move the slider left or right to darken or lighten the image. Adjusting the brightness level adjusts the tone of the pixels, without changing the true color of the pixels; such as when adjusting hue.

Choosing brightness values

Adjusting the brightness level is based on how you want the image to appear and there is no standard to adhere to. Below are some recommended options for brightness image correction based on the original document quality.

•Original documents of good quality - 50%

•Pencil written letters, forms, or drawings - 25% to 40%

•Faded pictures or old documents with faded text - 35% to 45%

•Light colored carbon copy paper, such as yellow or pale pink or pale green, with light text - 45% to 55%

•Newspaper or magazine pages - 55% to 70%

•Book pages - 55% to 80%

•Pictures taken inside or in the shade - 60% to 85%

Brightness works in conjunction with Contrast for image enhancement. When you are adjusting the brightness level to improve the scanned image quality, try adjusting the contrast level as well. The contrast level is the range between the lightest and darkest parts of the image. For example, if you scanned a document with notes written in pencil, you may have to decrease the brightness level to get the handwritten notes to appear in the scanned image. However, when decreasing the brightness, white starts to appear gray in the image. In that case, raise the contrast level to make the differences between the lightest and darkest part of the image more defined.

Xerox® DocuMate® 4700	151
User’s Guide