User`s guide

MP730/MP700
Software Guide (Scanning)
33
The gamma allows you to adjust the brightness of the image viewed on the computer monitor to the
brightness of the orignal document.
The monitor has characteristics (gamma values) for reproducing colors. The gamma value of an average
monitor is between 1.4 and 2.2, and reproduces colors in a somewhat darker way than the original
document. Consequently, to correct the difference between the color in the original image and the
reproduction of the color by the monitor, you may need to correct the gamma value.
The default setting for gamma is 2.2. You will have to change this value if you are using a monitor with a
different gamma value. For the monitor’s gamma value, refer to the documentation of your monitor, or
contact the manufacturer of your monitor.
When you set the monitor’s gamma value, the scanner’s gamma value will automatically be displayed in
the formula (reciprocal equation of the monitor gamma value) below.
1/ monitor gamma value = scanner gamma value
The gamma is active if [Color (Photo)] [Color (Documents)] or [Greyscale] is selected in [Color Mode].
You can set up the gamma without having to display a preview and the settings will be active when you
scan.
In ScanGear MP Advanced Mode, follow the steps below.
1 Click [Reset].
2 On the [Color] tab, click (Gamma).
3 For a color image, in [Channel], select to only adjust either red, green or blue, or select [Master] to
adjust the three colors together.
4 Move the slider to the left to decrease or the right to increase the contrast displayed in the middle of
the tonal range (midtones) of the image. You can also enter values (-0.10 to 10.00).
3
Scanning documents Setting preferences and scanning with ScanGear MP
Advanced Mode — [Color] tab — Gamma