| OpenCV 4.3.0 Open Source Computer Vision

Public Member Functions | List of all members
cv::cuda::BackgroundSubtractorMOG2 Class Referenceabstract
CUDA-accelerated Computer Vision » Background Segmentation

Gaussian Mixture-based Background/Foreground Segmentation Algorithm. More...

`#include <opencv2/cudabgsegm.hpp>`

Inheritance diagram for cv::cuda::BackgroundSubtractorMOG2:

## Public Member Functions
virtual void | apply (InputArray image, OutputArray fgmask, double learningRate, Stream &stream)=0
virtual void | getBackgroundImage (OutputArray backgroundImage, Stream &stream) const =0
void | getBackgroundImage (GpuMat &backgroundImage, Stream &stream)
Public Member Functions inherited from cv::BackgroundSubtractorMOG2
virtual void | apply (InputArray image, OutputArray fgmask, double learningRate=-1) CV_OVERRIDE=0
| Computes a foreground mask. More...
virtual double | getBackgroundRatio () const =0
| Returns the "background ratio" parameter of the algorithm. More...
virtual double | getComplexityReductionThreshold () const =0
| Returns the complexity reduction threshold. More...
virtual bool | getDetectShadows () const =0
| Returns the shadow detection flag. More...
virtual int | getHistory () const =0
| Returns the number of last frames that affect the background model. More...
virtual int | getNMixtures () const =0
| Returns the number of gaussian components in the background model. More...
virtual double | getShadowThreshold () const =0
| Returns the shadow threshold. More...
virtual int | getShadowValue () const =0
| Returns the shadow value. More...
virtual double | getVarInit () const =0
| Returns the initial variance of each gaussian component. More...
virtual double | getVarMax () const =0
virtual double | getVarMin () const =0
virtual double | getVarThreshold () const =0
| Returns the variance threshold for the pixel-model match. More...
virtual double | getVarThresholdGen () const =0
| Returns the variance threshold for the pixel-model match used for new mixture component generation. More...
virtual void | setBackgroundRatio (double ratio)=0
| Sets the "background ratio" parameter of the algorithm. More...
virtual void | setComplexityReductionThreshold (double ct)=0
| Sets the complexity reduction threshold. More...
virtual void | setDetectShadows (bool detectShadows)=0
| Enables or disables shadow detection. More...
virtual void | setHistory (int history)=0
| Sets the number of last frames that affect the background model. More...
virtual void | setNMixtures (int nmixtures)=0
| Sets the number of gaussian components in the background model. More...
virtual void | setShadowThreshold (double threshold)=0
| Sets the shadow threshold. More...
virtual void | setShadowValue (int value)=0
| Sets the shadow value. More...
virtual void | setVarInit (double varInit)=0
| Sets the initial variance of each gaussian component. More...
virtual void | setVarMax (double varMax)=0
virtual void | setVarMin (double varMin)=0
virtual void | setVarThreshold (double varThreshold)=0
| Sets the variance threshold for the pixel-model match. More...
virtual void | setVarThresholdGen (double varThresholdGen)=0
| Sets the variance threshold for the pixel-model match used for new mixture component generation. More...
Public Member Functions inherited from cv::BackgroundSubtractor
virtual void | getBackgroundImage (OutputArray backgroundImage) const =0
| Computes a background image. More...
Public Member Functions inherited from cv::Algorithm
| Algorithm ()
virtual | ~Algorithm ()
virtual void | clear ()
| Clears the algorithm state. More...
virtual bool | empty () const
| Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read. More...
virtual String | getDefaultName () const
virtual void | read (const FileNode &fn)
| Reads algorithm parameters from a file storage. More...
virtual void | save (const String &filename) const
virtual void | write (FileStorage &fs) const
| Stores algorithm parameters in a file storage. More...
void | write (const Ptr< FileStorage > &fs, const String &name=String()) const
| simplified API for language bindings This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

## Additional Inherited Members
Static Public Member Functions inherited from cv::Algorithm
template<typename _Tp >
static Ptr< _Tp > | load (const String &filename, const String &objname=String())
| Loads algorithm from the file. More...
template<typename _Tp >
static Ptr< _Tp > | loadFromString (const String &strModel, const String &objname=String())
| Loads algorithm from a String. More...
template<typename _Tp >
static Ptr< _Tp > | read (const FileNode &fn)
| Reads algorithm from the file node. More...
Protected Member Functions inherited from cv::Algorithm
void | writeFormat (FileStorage &fs) const

## Detailed Description

Gaussian Mixture-based Background/Foreground Segmentation Algorithm.

The class discriminates between foreground and background pixels by building and maintaining a model of the background. Any pixel which does not fit this model is then deemed to be foreground. The class implements algorithm described in [278] .

See also
  BackgroundSubtractorMOG2

## Member Function Documentation

## ◆ apply()

virtual void cv::cuda::BackgroundSubtractorMOG2::apply | ( | InputArray | image,
|  | OutputArray | fgmask,
|  | double | learningRate,
|  | Stream & | stream
| ) |  |
| pure virtual

## ◆ getBackgroundImage() [1/2]

virtual void cv::cuda::BackgroundSubtractorMOG2::getBackgroundImage | ( | OutputArray | backgroundImage,
|  | Stream & | stream
| ) |  | const
| pure virtual

## ◆ getBackgroundImage() [2/2]

void cv::cuda::BackgroundSubtractorMOG2::getBackgroundImage | ( | GpuMat & | backgroundImage,
|  | Stream & | stream
| ) |  |
| inline

The documentation for this class was generated from the following file:

- opencv2/cudabgsegm.hpp