This property sets the scan brightness. Enabled when using a custom-built user interface (UserInterface=Suppress).
Property Value
From -1000 to 1000. The default value is 0.
For Fujitsu PFU scan devices, when the PixelType property is Automation, GrayAndBW, or RGBAndBW, the value range for Brightness is from -127 to 127.
Explanation
The Brightness property sets the scan brightness. This property is only enabled when the UserInterface property is set to Suppress and the AutoBright property is false.
Note: There are cases when the PixelType property is BW and depending on the BitDepthReduction property value the Brightness property has no affect. See below.
The Brightness property is okay
When PixelType = BW and the BitDepthReduction = Threshold (*) or Halftone.
When the PixelType = Gray, RGB, or Palette
(*) This is only for scan devices
that do not support Threshold and use uses Brightness instead.
Note: This property is disabled for digital cameras and scanners
that do not support these functions. The possible setting values
supported by a scan device can be retrieved using the GetCapabilityEnumToSingle
method or the GetCapabilityRange method.