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SetAlphaChannel

SetAlphaChannel[image]
adds a fully opaque alpha channel to image.
SetAlphaChannel
sets the opacity of all pixels to a.
SetAlphaChannel
sets the alpha channel of image to aimage.
MORE INFORMATION
  • SetAlphaChannel uses an arbitrary Mathematica graphics object as the alpha channel.
EXAMPLESCLOSE ALL
Basic Examples   (2)
Set the pixel opacities in an image:
Specify the alpha channel using a graphics object:
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)
Add a constant alpha channel to an RGB image:
Add a constant alpha channel to a color image:
Applications   (2)
Set the alpha channel of an RGB image to a detected background:
Set the alpha channel of an RGB image to be the negative of its blue channel:
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