Notch Notch Manual 0.9.23
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Blob Tracker

Blob Tracker

This node generate blobs from an input image, and outputs transformation information for each of those blobs.

Method #

This node generates tracked blobs from an input image, and outputs transform information for each of those blobs. Generally used with transform arrays, to link blob motion to other nodes.

Input images need to be prepared for this node to function, usually ending with a threshold node to make a clear distinction between blobs and the rest of the content.



These properties control the core behaviours of the node.

Preview In ViewportPreview the effect blended with alpha in the viewport.
Preview RGB In ViewportPreview the colour values in the viewport.
Preview Alpha In ViewportPreview the alpha values in the viewport.
ThresholdThe min luminance value from the input image which will be incorporated into tracking.
Max RadiusRadius at which two blobs will be combined together and tracked as one.


NameDescriptionTypical Input
Effect MaskMask out areas that Post-FX applied to this node won’t be applied.Video Loader
Alpha ImageUse a seperate video nodes luminance values to overwrite the alpha channel of the image.Video Loader
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