Changes the image's premultiplication state from premultiplied to not premultiplied and vice-versa. In premultiplied images,
the RGB values of the pixels have been multiplied by their corresponding alpha channel values
Requires an Input (RGBA).
Produces an Output (RGBA).
Premultiply
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Specifies whether to premultiply or unpremultiply the image. Unpremultiplying returns the image to a not premultiplied state.
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