java.lang.Object
- org.opencv.core.Algorithm
- - org.opencv.video.DenseOpticalFlow
  - - org.opencv.video.DualTVL1OpticalFlow

```
public class DualTVL1OpticalFlow
extends DenseOpticalFlow
```
"Dual TV L1" Optical Flow Algorithm. The class implements the "Dual TV L1" optical flow algorithm described in CITE: Zach2007 and CITE: Javier2012 . Here are important members of the class that control the algorithm, which you can set after constructing the class instance:
- member double tau Time step of the numerical scheme.
- member double lambda Weight parameter for the data term, attachment parameter. This is the most relevant parameter, which determines the smoothness of the output. The smaller this parameter is, the smoother the solutions we obtain. It depends on the range of motions of the images, so its value should be adapted to each image sequence.
- member double theta Weight parameter for (u - v)\^2, tightness parameter. It serves as a link between the attachment and the regularization terms. In theory, it should have a small value in order to maintain both parts in correspondence. The method is stable for a large range of values of this parameter.
- member int nscales Number of scales used to create the pyramid of images.
- member int warps Number of warpings per scale. Represents the number of times that I1(x+u0) and grad( I1(x+u0) ) are computed per scale. This is a parameter that assures the stability of the method. It also affects the running time, so it is a compromise between speed and accuracy.
- member double epsilon Stopping criterion threshold used in the numerical scheme, which is a trade-off between precision and running time. A small value will yield more accurate solutions at the expense of a slower convergence.
- member int iterations Stopping criterion iterations number used in the numerical scheme.
C. Zach, T. Pock and H. Bischof, "A Duality Based Approach for Realtime TV-L1 Optical Flow". Javier Sanchez, Enric Meinhardt-Llopis and Gabriele Facciolo. "TV-L1 Optical Flow Estimation".

Field Summary
- Fields inherited from class org.opencv.core.Algorithm
  nativeObj

Constructor Summary

Constructors
Modifier Constructor Description

protected DualTVL1OpticalFlow(long addr)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static DualTVL1OpticalFlow`	`__fromPtr__(long addr)`
`static DualTVL1OpticalFlow`	`create()`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales, int warps)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales, int warps, double epsilon)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales, int warps, double epsilon, int innnerIterations)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales, int warps, double epsilon, int innnerIterations, int outerIterations)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales, int warps, double epsilon, int innnerIterations, int outerIterations, double scaleStep)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales, int warps, double epsilon, int innnerIterations, int outerIterations, double scaleStep, double gamma)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales, int warps, double epsilon, int innnerIterations, int outerIterations, double scaleStep, double gamma, int medianFiltering)`	Creates instance of cv::DualTVL1OpticalFlow
`static DualTVL1OpticalFlow`	`create(double tau, double lambda, double theta, int nscales, int warps, double epsilon, int innnerIterations, int outerIterations, double scaleStep, double gamma, int medianFiltering, boolean useInitialFlow)`	Creates instance of cv::DualTVL1OpticalFlow
`protected void`	`finalize()`
`double`	`getEpsilon()`	SEE: setEpsilon
`double`	`getGamma()`	SEE: setGamma
`int`	`getInnerIterations()`	SEE: setInnerIterations
`double`	`getLambda()`	SEE: setLambda
`int`	`getMedianFiltering()`	SEE: setMedianFiltering
`int`	`getOuterIterations()`	SEE: setOuterIterations
`int`	`getScalesNumber()`	SEE: setScalesNumber
`double`	`getScaleStep()`	SEE: setScaleStep
`double`	`getTau()`	SEE: setTau
`double`	`getTheta()`	SEE: setTheta
`boolean`	`getUseInitialFlow()`	SEE: setUseInitialFlow
`int`	`getWarpingsNumber()`	SEE: setWarpingsNumber
`void`	`setEpsilon(double val)`	getEpsilon SEE: getEpsilon
`void`	`setGamma(double val)`	getGamma SEE: getGamma
`void`	`setInnerIterations(int val)`	getInnerIterations SEE: getInnerIterations
`void`	`setLambda(double val)`	getLambda SEE: getLambda
`void`	`setMedianFiltering(int val)`	getMedianFiltering SEE: getMedianFiltering
`void`	`setOuterIterations(int val)`	getOuterIterations SEE: getOuterIterations
`void`	`setScalesNumber(int val)`	getScalesNumber SEE: getScalesNumber
`void`	`setScaleStep(double val)`	getScaleStep SEE: getScaleStep
`void`	`setTau(double val)`	getTau SEE: getTau
`void`	`setTheta(double val)`	getTheta SEE: getTheta
`void`	`setUseInitialFlow(boolean val)`	getUseInitialFlow SEE: getUseInitialFlow
`void`	`setWarpingsNumber(int val)`	getWarpingsNumber SEE: getWarpingsNumber

Methods inherited from class org.opencv.video.DenseOpticalFlow
calc, collectGarbage

Methods inherited from class org.opencv.core.Algorithm
clear, empty, getDefaultName, getNativeObjAddr, save

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DualTVL1OpticalFlow

protected DualTVL1OpticalFlow(long addr)

Method Detail

fromPtr

public static DualTVL1OpticalFlow __fromPtr__(long addr)

getTau
```
public double getTau()
```
SEE: setTau

Returns:

automatically generated

setTau
```
public void setTau(double val)
```
getTau SEE: getTau

Parameters:

val - automatically generated

getLambda
```
public double getLambda()
```
SEE: setLambda

Returns:

automatically generated

setLambda
```
public void setLambda(double val)
```
getLambda SEE: getLambda

Parameters:

val - automatically generated

getTheta
```
public double getTheta()
```
SEE: setTheta

Returns:

automatically generated

setTheta
```
public void setTheta(double val)
```
getTheta SEE: getTheta

Parameters:

val - automatically generated

getGamma
```
public double getGamma()
```
SEE: setGamma

Returns:

automatically generated

setGamma
```
public void setGamma(double val)
```
getGamma SEE: getGamma

Parameters:

val - automatically generated

getScalesNumber
```
public int getScalesNumber()
```
SEE: setScalesNumber

Returns:

automatically generated

setScalesNumber
```
public void setScalesNumber(int val)
```
getScalesNumber SEE: getScalesNumber

Parameters:

val - automatically generated

getWarpingsNumber
```
public int getWarpingsNumber()
```
SEE: setWarpingsNumber

Returns:

automatically generated

setWarpingsNumber
```
public void setWarpingsNumber(int val)
```
getWarpingsNumber SEE: getWarpingsNumber

Parameters:

val - automatically generated

getEpsilon
```
public double getEpsilon()
```
SEE: setEpsilon

Returns:

automatically generated

setEpsilon
```
public void setEpsilon(double val)
```
getEpsilon SEE: getEpsilon

Parameters:

val - automatically generated

getInnerIterations
```
public int getInnerIterations()
```
SEE: setInnerIterations

Returns:

automatically generated

setInnerIterations
```
public void setInnerIterations(int val)
```
getInnerIterations SEE: getInnerIterations

Parameters:

val - automatically generated

getOuterIterations
```
public int getOuterIterations()
```
SEE: setOuterIterations

Returns:

automatically generated

setOuterIterations
```
public void setOuterIterations(int val)
```
getOuterIterations SEE: getOuterIterations

Parameters:

val - automatically generated

getUseInitialFlow
```
public boolean getUseInitialFlow()
```
SEE: setUseInitialFlow

Returns:

automatically generated

setUseInitialFlow
```
public void setUseInitialFlow(boolean val)
```
getUseInitialFlow SEE: getUseInitialFlow

Parameters:

val - automatically generated

getScaleStep
```
public double getScaleStep()
```
SEE: setScaleStep

Returns:

automatically generated

setScaleStep
```
public void setScaleStep(double val)
```
getScaleStep SEE: getScaleStep

Parameters:

val - automatically generated

getMedianFiltering
```
public int getMedianFiltering()
```
SEE: setMedianFiltering

Returns:

automatically generated

setMedianFiltering
```
public void setMedianFiltering(int val)
```
getMedianFiltering SEE: getMedianFiltering

Parameters:

val - automatically generated