BlendAlphaImg

DESCRIPTION

Computes a blended image by taking a linear combination of two source images according to the values of an alpha (or blend) image:
output(i,j) = foreground(i,j) * alpha(i,j) +
background(i,j) * ( 1 - alpha(i,j))

INPUTS

Port: First Img In
Type: Lattice
Constraints: 1..3-D
Background image.

Port: Second Img In
Type: Lattice
Constraints: 1..3-D
Foreground image.

Port: Blend Img
Type: Lattice
Constraints: 1..3-D
Alpha image.

WIDGETS

OUTPUTS

Port: Img Out
Type: Lattice
Constraints: 1..3-D
Alpha blended image.

KNOWN PROBLEMS

SEE ALSO

BlendImg, AddImg.
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© The Numerical Algorithms Group Ltd, Oxford UK. 2000