SetAlphaChannel

SetAlphaChannel[image]

adds a fully opaque alpha channel to image.

SetAlphaChannel[image,a]

sets the opacity of all pixels to a.

SetAlphaChannel[image,aimage]

sets the alpha channel of image to aimage.

Details

SetAlphaChannel[image] is equivalent to SetAlphaChannel[image,1].
SetAlphaChannel[image,…] ignores opacity properties of image.
SetAlphaChannel[image,graphics] uses an arbitrary Wolfram Language graphics object as the alpha channel.
SetAlphaChannel works with images of explicit color spaces—that is, any setting of the ColorSpace option other than Automatic.
SetAlphaChannel works with Image3D objects.

Examples

open allclose all

Basic Examples (2)

Set the pixel opacities in an image:

In[1]:=

Click for copyable input

Out[1]=

Specify the alpha channel using a graphics object:

In[1]:=

Click for copyable input

Out[1]=

Scope (2)

Applications (4)

Properties & Relations (1)

Interactive Examples (1)

See Also

RemoveAlphaChannel AlphaChannel ColorCombine ColorSeparate

Related Guides

Introduced in 2010

(8.0)

| Updated in 2012

(9.0)

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