Canon imageCLASS MF5770 imageCLASS MF5700 Series Software Guide - Page 136

■ [Gamma] By clicking , you can access the [Gamma] dialog box. The gamma allows you to adjust the brightness of the image viewed on the computer monitor to the brightness of the original document. The default is 2.2. You will have to change this value if you are using a monitor with a different gamma value. 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] or [Grayscale] is selected in [Color Mode]. 3 To adjust the gamma diagrammatically, press . NOTE • 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. • For the monitor's gamma value, refer to the documentation of your monitor, or contact the manufacturer of your monitor. Scanning [Channel] Adjust the elements of grayscale when [Color Mode] is set to [Grayscale]. Selects a color to adjust either [Red], [Green], or [Blue], or select [Master] to adjust the three colors together when [Color Mode] is set to [Color]. 3-34 Setting Preferences and Scanning with ScanGear MF