User guide
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Control (UI) Default Value Function
channel A The channel from out_mask input to use as a mask:
• R - use the red channel as the mask.
• G - use the green channel as the mask.
• B - use the blue channel as the mask.
• A - use the alpha channel as the mask.
By default, the offset effect is limited to the non-black areas of
the mask.
invert disabled Inverts the use of the mask channel so that the offset effect is
limited to the non-white areas of the mask.
fringe disabled When enabled, the mask is modified so that by default the
offset effect is limited to the fringe (semi-transparent areas).
offset
x 0 The number of pixels by which you want to offset the input
image along the x axis. For example, if you enter 2 in this field, 2
is added to the x values.
y 0 The number of pixels by which you want to offset the input
image along the y axis. For example, if you enter 2 in this field, 2
is added to the y values.
adjustDisplayWindow disabled When enabled, the displayWindow is repositioned along with
the image content.
Note: This is very rarely desired, as convention dictates that the
displayWindow should always have the lower left corner pinned
to 0, 0.
ImagePremultiply
This node premultiplies (mult) the rgb channels by the alphaChannel when an image is connected to the alpha
input. Otherwise, a is read from the input leaving the alpha channel unchanged.
Also see ImageUnpremultiply on page272.
4 NODES I-K | IMAGEPREMULTIPLY