BackgroundSubtractorMOG2 Class |
Namespace: OpenCvSharp
The BackgroundSubtractorMOG2 type exposes the following members.
Name | Description | |
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AllocatedMemory |
Gets or sets a memory address allocated by AllocMemory.
(Inherited from DisposableObject.) | |
AllocatedMemorySize |
Gets or sets the byte length of the allocated memory
(Inherited from DisposableObject.) | |
BackgroundRatio |
Gets or sets the "background ratio" parameter of the algorithm.
If a foreground pixel keeps semi-constant value for about backgroundRatio\*history frames, it's
considered background and added to the model as a center of a new component. It corresponds to TB
parameter in the paper.
| |
ComplexityReductionThreshold |
Gets or sets the complexity reduction threshold.
This parameter defines the number of samples needed to accept to prove the component exists. CT=0.05
is a default value for all the samples. By setting CT=0 you get an algorithm very similar to the standard Stauffer&Grimson algorithm.
| |
CvPtr |
Native pointer of OpenCV structure
(Inherited from DisposableCvObject.) | |
DataHandle |
Gets or sets a handle which allocates using cvSetData.
(Inherited from DisposableObject.) | |
DetectShadows |
Gets or sets the shadow detection flag.
If true, the algorithm detects shadows and marks them. See createBackgroundSubtractorKNN for details.
| |
Empty |
Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read
(Inherited from Algorithm.) | |
History |
Gets or sets the number of last frames that affect the background model.
| |
IsDisposed |
Gets a value indicating whether this instance has been disposed.
(Inherited from DisposableObject.) | |
IsEnabledDispose |
Gets or sets a value indicating whether you permit disposing this instance.
(Inherited from DisposableObject.) | |
NMixtures |
Gets or sets the number of gaussian components in the background model.
| |
ShadowThreshold |
Gets or sets the shadow threshold.
A shadow is detected if pixel is a darker version of the background. The shadow threshold (Tau in
the paper) is a threshold defining how much darker the shadow can be. Tau= 0.5 means that if a pixel
is more than twice darker then it is not shadow. See Prati, Mikic, Trivedi and Cucchiara,
*Detecting Moving Shadows...*, IEEE PAMI,2003.
| |
ShadowValue |
Gets or sets the shadow value.
Shadow value is the value used to mark shadows in the foreground mask. Default value is 127.
Value 0 in the mask always means background, 255 means foreground.
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VarInit |
Gets or sets the initial variance of each gaussian component.
| |
VarMax | ||
VarMin | ||
VarThreshold |
Gets or sets the variance threshold for the pixel-model match.
The main threshold on the squared Mahalanobis distance to decide if the sample is well described by
the background model or not. Related to Cthr from the paper.
| |
VarThresholdGen |
Gets or sets the variance threshold for the pixel-model match used for new mixture component generation.
Threshold for the squared Mahalanobis distance that helps decide when a sample is close to the
existing components (corresponds to Tg in the paper). If a pixel is not close to any component, it
is considered foreground or added as a new component. 3 sigma =\> Tg=3\*3=9 is default. A smaller Tg
value generates more components. A higher Tg value may result in a small number of components but they can grow too large.
|
Name | Description | |
---|---|---|
AllocGCHandle |
Pins the object to be allocated by cvSetData.
(Inherited from DisposableObject.) | |
AllocMemory |
Allocates the specified size of memory.
(Inherited from DisposableObject.) | |
Apply |
the update operator that takes the next video frame and returns the current foreground mask as 8-bit binary image.
(Inherited from BackgroundSubtractor.) | |
Create |
Creates MOG2 Background Subtractor.
| |
Dispose |
Releases the resources
(Inherited from DisposableObject.) | |
Dispose(Boolean) |
Releases the resources
(Inherited from DisposableObject.) | |
DisposeManaged |
Releases managed resources
(Overrides DisposableObjectDisposeManaged.) | |
DisposeUnmanaged |
releases unmanaged resources
(Inherited from DisposableCvObject.) | |
Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) | |
Finalize |
Destructor
(Inherited from DisposableObject.) | |
GetBackgroundImage |
computes a background image
(Inherited from BackgroundSubtractor.) | |
GetDefaultName |
Returns the algorithm string identifier.
This string is used as top level xml/yml node tag when the object
is saved to a file or string.
(Inherited from Algorithm.) | |
GetHashCode | Serves as the default hash function. (Inherited from Object.) | |
GetType | Gets the Type of the current instance. (Inherited from Object.) | |
MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) | |
NotifyMemoryPressure |
Notifies the allocated size of memory.
(Inherited from DisposableObject.) | |
Read |
Reads algorithm parameters from a file storage
(Inherited from Algorithm.) | |
Save |
Saves the algorithm to a file.
In order to make this method work, the derived class must
implement Algorithm::write(FileStorage fs).
(Inherited from Algorithm.) | |
ThrowIfDisposed |
If this object is disposed, then ObjectDisposedException is thrown.
(Inherited from DisposableObject.) | |
ToString | Returns a string that represents the current object. (Inherited from Object.) | |
Write |
Stores algorithm parameters in a file storage
(Inherited from Algorithm.) |
Name | Description | |
---|---|---|
ptr |
Data pointer
(Inherited from DisposableCvObject.) |