BitmapImageOver

This is the main compositing operation. The Over operator takes an image (combined with a matte) and lays it on top of the second image. Intuitively, people understand compositing with a matte channel as if the matte were a cookie-cutter which removes all excess information from the foreground image and the result is then pasted on top of the background.

We assume the foreground image already having a built-in matte channel and the foreground's color channels have already been pre-multiplied by that matte channel.

Properties

NameDescription
nameObject name [string]
input_a"A" input bitmap [bitmap]
input_b"B" Input bitmap [bitmap]
outputOutput bitmap [bitmap]

See also

BitmapImageUnder

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