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Xerox DocuMate 3125 Benutzerhandbuch Seite 144

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Scanning from TWAIN and WIA
Xerox
DocuMate
3125
Adjusting the gamma level is based on how you want the image to appear and there is no
standard to adhere to.
Color image gamma examples
The examples below show the original image at the default setting of 1.8 gamma level, then
1.0 gamma and 2.6 gamma. Adjusting the gamma level does not make the image completely
black nor completely white.
Gamma: 1.0
Gamma: 1.8
Gamma: 2.6
Technical note:
Most monitors have a gamma setting that is user adjustable. When viewing scanned images
on-screen, versus printing the image, the gamma 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 gamma level does not modify the
image how you want, try adjusting the monitor's gamma level. Refer to the monitor's user
guide for adjusting the gamma level and see if the manufacturer has any recommended
settings.
Invert Image
The Invert image option reverses the color of each pixel in the scanned image.
When scanning in black and white, each pixel is reversed from black to white and white to black.
When scanning in grayscale each pixel is reversed to the opposite level of gray. When scanning
in color each pixel is reversed to the opposite color in the color wheel.
For example, you might choose this option if you are scanning pages that have been printed
from newspaper microfilm. Newspaper microfilm reverses black and white so that when viewed
on a monitor, the text is white and the paper is black.
User's Guide
7-136

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