DIS optical flow algorithm. More...

Public Member Functions
int	getFinestScale ()
	Finest level of the Gaussian pyramid on which the flow is computed (zero level corresponds to the original image resolution). The final flow is obtained by bilinear upscaling.

int	getGradientDescentIterations ()
	Maximum number of gradient descent iterations in the patch inverse search stage. Higher values may improve quality in some cases.

int	getPatchSize ()
	Size of an image patch for matching (in pixels). Normally, default 8x8 patches work well enough in most cases.

int	getPatchStride ()
	Stride between neighbor patches. Must be less than patch size. Lower values correspond to higher flow quality.

bool	getUseMeanNormalization ()
	Whether to use mean-normalization of patches when computing patch distance. It is turned on by default as it typically provides a noticeable quality boost because of increased robustness to illumination variations. Turn it off if you are certain that your sequence doesn't contain any changes in illumination.

bool	getUseSpatialPropagation ()
	Whether to use spatial propagation of good optical flow vectors. This option is turned on by default, as it tends to work better on average and can sometimes help recover from major errors introduced by the coarse-to-fine scheme employed by the DIS optical flow algorithm. Turning this option off can make the output flow field a bit smoother, however.

float	getVariationalRefinementAlpha ()
	Weight of the smoothness term.

float	getVariationalRefinementDelta ()
	Weight of the color constancy term.

float	getVariationalRefinementEpsilon ()
	Norm value shift for robust penalizer.

float	getVariationalRefinementGamma ()
	Weight of the gradient constancy term.

int	getVariationalRefinementIterations ()
	Number of fixed point iterations of variational refinement per scale. Set to zero to disable variational refinement completely. Higher values will typically result in more smooth and high-quality flow.

void	setFinestScale (int val)

void	setGradientDescentIterations (int val)

void	setPatchSize (int val)

void	setPatchStride (int val)

void	setUseMeanNormalization (bool val)

void	setUseSpatialPropagation (bool val)

void	setVariationalRefinementAlpha (float val)

void	setVariationalRefinementDelta (float val)

void	setVariationalRefinementEpsilon (float val)

void	setVariationalRefinementGamma (float val)

void	setVariationalRefinementIterations (int val)

Public Member Functions inherited from OpenCVForUnity.VideoModule.DenseOpticalFlow
void	calc (Mat I0, Mat I1, Mat flow)
	Calculates an optical flow.

void	collectGarbage ()
	Releases all inner buffers.

Public Member Functions inherited from OpenCVForUnity.CoreModule.Algorithm
virtual void	clear ()
	Clears the algorithm state.

virtual bool	empty ()
	Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read.

virtual string	getDefaultName ()

IntPtr	getNativeObjAddr ()

void	save (string filename)

Public Member Functions inherited from OpenCVForUnity.DisposableObject
void	Dispose ()

void	ThrowIfDisposed ()

Static Public Member Functions
static new DISOpticalFlow	__fromPtr__ (IntPtr addr)

static DISOpticalFlow	create ()
	Creates an instance of DISOpticalFlow.

static DISOpticalFlow	create (int preset)
	Creates an instance of DISOpticalFlow.

Static Public Member Functions inherited from OpenCVForUnity.VideoModule.DenseOpticalFlow
static new DenseOpticalFlow	__fromPtr__ (IntPtr addr)

Static Public Member Functions inherited from OpenCVForUnity.CoreModule.Algorithm
static Algorithm	__fromPtr__ (IntPtr addr)

Static Public Member Functions inherited from OpenCVForUnity.DisposableObject
static IntPtr	ThrowIfNullIntPtr (IntPtr ptr)

Static Public Attributes
const int	PRESET_FAST = 1

const int	PRESET_MEDIUM = 2

const int	PRESET_ULTRAFAST = 0

Protected Member Functions
override void	Dispose (bool disposing)

Protected Member Functions inherited from OpenCVForUnity.VideoModule.DenseOpticalFlow
Protected Member Functions inherited from OpenCVForUnity.CoreModule.Algorithm
Protected Member Functions inherited from OpenCVForUnity.DisposableOpenCVObject
	DisposableOpenCVObject ()

	DisposableOpenCVObject (bool isEnabledDispose)

	DisposableOpenCVObject (IntPtr ptr)

	DisposableOpenCVObject (IntPtr ptr, bool isEnabledDispose)

override void	Dispose (bool disposing)

Protected Member Functions inherited from OpenCVForUnity.DisposableObject
	DisposableObject ()

	DisposableObject (bool isEnabledDispose)

Additional Inherited Members
Package Functions inherited from OpenCVForUnity.VideoModule.DenseOpticalFlow
Package Functions inherited from OpenCVForUnity.CoreModule.Algorithm
Package Attributes inherited from OpenCVForUnity.DisposableOpenCVObject
Properties inherited from OpenCVForUnity.DisposableObject
bool	IsDisposed `[get, protected set]`

bool	IsEnabledDispose `[get, set]`

Detailed Description

DIS optical flow algorithm.

This class implements the Dense Inverse Search (DIS) optical flow algorithm. More details about the algorithm can be found at [Kroeger2016] . Includes three presets with preselected parameters to provide reasonable trade-off between speed and quality. However, even the slowest preset is still relatively fast, use DeepFlow if you need better quality and don't care about speed.

This implementation includes several additional features compared to the algorithm described in the paper, including spatial propagation of flow vectors (getUseSpatialPropagation), as well as an option to utilize an initial flow approximation passed to calc (which is, essentially, temporal propagation, if the previous frame's flow field is passed).

Member Function Documentation

◆ fromPtr()

static new DISOpticalFlow OpenCVForUnity.VideoModule.DISOpticalFlow.__fromPtr__ ( IntPtr addr )

static

◆ create() [1/2]

static DISOpticalFlow OpenCVForUnity.VideoModule.DISOpticalFlow.create ( )

static

Creates an instance of DISOpticalFlow.

Parameters

preset one of PRESET_ULTRAFAST, PRESET_FAST and PRESET_MEDIUM

◆ create() [2/2]

static DISOpticalFlow OpenCVForUnity.VideoModule.DISOpticalFlow.create ( int preset )

static

Creates an instance of DISOpticalFlow.

Parameters

preset one of PRESET_ULTRAFAST, PRESET_FAST and PRESET_MEDIUM

◆ Dispose()

override void OpenCVForUnity.VideoModule.DISOpticalFlow.Dispose ( bool disposing )

protectedvirtual

Reimplemented from OpenCVForUnity.VideoModule.DenseOpticalFlow.

◆ getFinestScale()

int OpenCVForUnity.VideoModule.DISOpticalFlow.getFinestScale ( )

Finest level of the Gaussian pyramid on which the flow is computed (zero level corresponds to the original image resolution). The final flow is obtained by bilinear upscaling.

See also: setFinestScale

◆ getGradientDescentIterations()

int OpenCVForUnity.VideoModule.DISOpticalFlow.getGradientDescentIterations ( )

Maximum number of gradient descent iterations in the patch inverse search stage. Higher values may improve quality in some cases.

See also: setGradientDescentIterations

◆ getPatchSize()

int OpenCVForUnity.VideoModule.DISOpticalFlow.getPatchSize ( )

Size of an image patch for matching (in pixels). Normally, default 8x8 patches work well enough in most cases.

See also: setPatchSize

◆ getPatchStride()

int OpenCVForUnity.VideoModule.DISOpticalFlow.getPatchStride ( )

Stride between neighbor patches. Must be less than patch size. Lower values correspond to higher flow quality.

See also: setPatchStride

◆ getUseMeanNormalization()

bool OpenCVForUnity.VideoModule.DISOpticalFlow.getUseMeanNormalization ( )

Whether to use mean-normalization of patches when computing patch distance. It is turned on by default as it typically provides a noticeable quality boost because of increased robustness to illumination variations. Turn it off if you are certain that your sequence doesn't contain any changes in illumination.

See also: setUseMeanNormalization

◆ getUseSpatialPropagation()

bool OpenCVForUnity.VideoModule.DISOpticalFlow.getUseSpatialPropagation ( )

Whether to use spatial propagation of good optical flow vectors. This option is turned on by default, as it tends to work better on average and can sometimes help recover from major errors introduced by the coarse-to-fine scheme employed by the DIS optical flow algorithm. Turning this option off can make the output flow field a bit smoother, however.

See also: setUseSpatialPropagation

◆ getVariationalRefinementAlpha()

float OpenCVForUnity.VideoModule.DISOpticalFlow.getVariationalRefinementAlpha ( )

Weight of the smoothness term.

See also: setVariationalRefinementAlpha

◆ getVariationalRefinementDelta()

float OpenCVForUnity.VideoModule.DISOpticalFlow.getVariationalRefinementDelta ( )

Weight of the color constancy term.

See also: setVariationalRefinementDelta

◆ getVariationalRefinementEpsilon()

float OpenCVForUnity.VideoModule.DISOpticalFlow.getVariationalRefinementEpsilon ( )

Norm value shift for robust penalizer.

See also: setVariationalRefinementEpsilon

◆ getVariationalRefinementGamma()

float OpenCVForUnity.VideoModule.DISOpticalFlow.getVariationalRefinementGamma ( )

Weight of the gradient constancy term.

See also: setVariationalRefinementGamma

◆ getVariationalRefinementIterations()

int OpenCVForUnity.VideoModule.DISOpticalFlow.getVariationalRefinementIterations ( )

Number of fixed point iterations of variational refinement per scale. Set to zero to disable variational refinement completely. Higher values will typically result in more smooth and high-quality flow.

See also: setGradientDescentIterations

◆ setFinestScale()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setFinestScale ( int val )

Finest level of the Gaussian pyramid on which the flow is computed (zero level corresponds to the original image resolution). The final flow is obtained by bilinear upscaling.

See also: getFinestScale

◆ setGradientDescentIterations()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setGradientDescentIterations ( int val )

Maximum number of gradient descent iterations in the patch inverse search stage. Higher values may improve quality in some cases.

See also: getGradientDescentIterations

◆ setPatchSize()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setPatchSize ( int val )

Size of an image patch for matching (in pixels). Normally, default 8x8 patches work well enough in most cases.

See also: getPatchSize

◆ setPatchStride()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setPatchStride ( int val )

Stride between neighbor patches. Must be less than patch size. Lower values correspond to higher flow quality.

See also: getPatchStride

◆ setUseMeanNormalization()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setUseMeanNormalization ( bool val )

Whether to use mean-normalization of patches when computing patch distance. It is turned on by default as it typically provides a noticeable quality boost because of increased robustness to illumination variations. Turn it off if you are certain that your sequence doesn't contain any changes in illumination.

See also: getUseMeanNormalization

◆ setUseSpatialPropagation()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setUseSpatialPropagation ( bool val )

Whether to use spatial propagation of good optical flow vectors. This option is turned on by default, as it tends to work better on average and can sometimes help recover from major errors introduced by the coarse-to-fine scheme employed by the DIS optical flow algorithm. Turning this option off can make the output flow field a bit smoother, however.

See also: getUseSpatialPropagation

◆ setVariationalRefinementAlpha()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setVariationalRefinementAlpha ( float val )

Weight of the smoothness term.

See also: getVariationalRefinementAlpha

◆ setVariationalRefinementDelta()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setVariationalRefinementDelta ( float val )

Weight of the color constancy term.

See also: getVariationalRefinementDelta

◆ setVariationalRefinementEpsilon()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setVariationalRefinementEpsilon ( float val )

Norm value shift for robust penalizer.

See also: getVariationalRefinementEpsilon

◆ setVariationalRefinementGamma()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setVariationalRefinementGamma ( float val )

Weight of the gradient constancy term.

See also: getVariationalRefinementGamma

◆ setVariationalRefinementIterations()

void OpenCVForUnity.VideoModule.DISOpticalFlow.setVariationalRefinementIterations ( int val )

Maximum number of gradient descent iterations in the patch inverse search stage. Higher values may improve quality in some cases.

See also: getGradientDescentIterations

Member Data Documentation

◆ PRESET_FAST

const int OpenCVForUnity.VideoModule.DISOpticalFlow.PRESET_FAST = 1

static

◆ PRESET_MEDIUM

const int OpenCVForUnity.VideoModule.DISOpticalFlow.PRESET_MEDIUM = 2

static

◆ PRESET_ULTRAFAST

const int OpenCVForUnity.VideoModule.DISOpticalFlow.PRESET_ULTRAFAST = 0

static

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

OpenCVForUnity/Assets/OpenCVForUnity/org/opencv/video/DISOpticalFlow.cs

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ __fromPtr__()

◆ create() [1/2]

◆ create() [2/2]

◆ Dispose()

◆ getFinestScale()

◆ getGradientDescentIterations()

◆ getPatchSize()

◆ getPatchStride()

◆ getUseMeanNormalization()

◆ getUseSpatialPropagation()

◆ getVariationalRefinementAlpha()

◆ getVariationalRefinementDelta()

◆ getVariationalRefinementEpsilon()

◆ getVariationalRefinementGamma()

◆ getVariationalRefinementIterations()

◆ setFinestScale()

◆ setGradientDescentIterations()

◆ setPatchSize()

◆ setPatchStride()

◆ setUseMeanNormalization()

◆ setUseSpatialPropagation()

◆ setVariationalRefinementAlpha()

◆ setVariationalRefinementDelta()

◆ setVariationalRefinementEpsilon()

◆ setVariationalRefinementGamma()

◆ setVariationalRefinementIterations()

Member Data Documentation

◆ PRESET_FAST

◆ PRESET_MEDIUM

◆ PRESET_ULTRAFAST

◆ fromPtr()