BackgroundSubtraction
The BackgroundSubtraction block applies a background subtractor and computes a foreground mask for image src.
Library
ComputerVision/Videos/Operations
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
type | Type | Specifies the algorithm. | Structure | |
type/MOG2 | MOG2 | Uses Gaussian Mixture-based algorithm. | Number | 0 |
type/KNN | KNN | Uses K-nearest neighbors background subtraction algorithm. | Number | 0 |
rate | Learning rate | The value between 0 and 1 that indicates how fast the background model is learnt. Negative parameter value makes the algorithm to use some automatically chosen learning rate. 0 means that the background model is not updated at all, 1 means that the background model is completely reinitialized from the last frame. | Scalar | |
externalActivation | External activation | This parameter defines if the block receives or inherits an external activation. When External Activation is used, an additional activation port is added to the block. Default is ON. | Number | 0 |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
src | explicit | input | 1 | |
mask | explicit | output | 1 | |
Port 3 | activation | input | externalActivation |