Xerox DocuMate 3125 User Manual page 141

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Xerox DocuMate 3125
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.
Color image brightness examples
The examples below show the original image at the default setting of 50% brightness level,
25% brightness and 75% brightness. Adjusting the brightness level does not make the image
completely black nor completely white.
Brightness: 25%
Technical note:
Most monitors have a brightness setting that is user adjustable. When viewing scanned images
on-screen, versus printing the image, the brightness setting of the monitor may affect how light
or dark the scanned image looks when compared to the original. If the scanned image is too
different from the original image, or if adjusting the scanned brightness level does not modify
the image how you want, try adjusting the monitor's brightness level. Refer to the monitor's
user guide for adjusting the brightness level and see if the manufacturer has any recommended
settings.
7-133
Brightness: 50%
Scanning from TWAIN and WIA
Brightness: 75%
User's Guide