Notch Notch Manual 0.9.23
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Frame Difference

Frame Difference

Subtract the current frame of a video from the previous frames.

image

Method #

This node takes the incoming frame and subtracts it against the previous image, highlighting the areas where the frame has changed. Useful for detecting changes in a video, or for highlighting areas of motion in a scene.

Parameters

These properties control the core behaviours of the node.

ParameterDetails
ActiveEnables or disables the effect. Disabling the effect means it will no longer compute, so disabling a node when not in use can improve performance.
Blend AmountChanges the opacity of the new effect over the original image.
Blend Mode (RGB)Change how the generated effect blends with the parent image RGB.
Intensity ScaleThe intensity of the effect that is applied.
Num FramesNumber of frames other than the original frame included in the difference calculation.
Use Absolute DifferenceToggles whether magnitudes of differences between pixels should be used, or whether differences only occur when the new pixel is brighter than the old.

Inputs

NameDescriptionTypical Input
ActiveEnables or disables the effect. Disabling the effect means it will no longer compute, so disabling a node when not in use can improve performance.Envelope Modifier