FormatConvertedBitmap.AlphaThreshold Property
Gets or sets the alpha channel threshold of a bitmap when converting to palletized formats that recognizes an alpha color.
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
<object AlphaThreshold="double" .../>
Property Value
Type: System.DoubleThe alpha channel threshold for this FormatConvertedBitmap. The default value is 0.0.
The AlphaThreshold value is used to determine what level of opacity will be mapped to the fully transparent color in the converted format. A value of 9.8 implies that any pixel with an alpha value of less than 25 will be mapped to the transparent color. A value of 100 maps all pixels which are not fully opaque to the transparent color.
The destination palette should provide a transparent color; otherwise, the transparent color will be the one closest to zero, often black.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
