Blob Tracker
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.
SampleParameters
These properties control the core behaviours of the node.
Parameter Details
Preview In Viewport Preview the effect blended with alpha in the viewport.
Preview RGB In Viewport Preview the colour values in the viewport.
Preview Alpha In Viewport Preview the alpha values in the viewport.
Threshold The min luminance value from the input image which will be incorporated into tracking.
Max Radius Radius at which two blobs will be combined together and tracked as one.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Preview In Viewport | Preview the effect blended with alpha in the viewport. |
| Preview RGB In Viewport | Preview the colour values in the viewport. |
| Preview Alpha In Viewport | Preview the alpha values in the viewport. |
| Threshold | The min luminance value from the input image which will be incorporated into tracking. |
| Max Radius | Radius at which two blobs will be combined together and tracked as one. |
| Name | Description | Typical Input |
|---|---|---|
| Effect Mask | Mask out areas that Post-FX applied to this node won’t be applied. | Video Loader |
| Alpha Image | Use a seperate video nodes luminance values to overwrite the alpha channel of the image. | Video Loader |
| Active | Enables 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 |