BlendEffect.GlobalAlpha Property

The factor of interpolation between the result of the blend operation and the original image.

Range [-2.5, 2.5], where 0.0 gives a result identical to the source image and 1.0 means the result of the blend operation is fully visible.

The result is calculated using the formula result = (1 - GlobalAlpha) * BackgroundSource + GlobalAlpha * ForegroundSource. By using values outside of the [0.0, 1.0] range one can use extrapolation to achieve additional effects on the image (such as saturation or sharpening).

Namespace: Lumia.Imaging.Compositing
Assembly: Lumia.Imaging (in Lumia.Imaging.dll) Version:

function get_GlobalAlpha();
function set_GlobalAlpha(value);

Property Value

Type: Double

Lumia Imaging SDK

Supported in: 3.0, 2.0