cv.DISOpticalFlow - mexopencv

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 cv.calcOpticalFlowDF 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 (cv.DISOpticalFlow.UseSpatialPropagation), as well as an option to utilize an initial flow approximation passed to cv.DISOpticalFlow.calc (which is, essentially, temporal propagation, if the previous frame's flow field is passed).

References

[Kroeger2016]:

Till Kroeger, Radu Timofte, Dengxin Dai, and Luc Van Gool. "Fast optical flow using dense inverse search". In Proceedings of the European Conference on Computer Vision (ECCV), 2016.

Superclasses	handle
Sealed	false
Construct on load	false

FinestScale	Finest level of the Gaussian pyramid on which the flow is computed
GradientDescentIterations	Maximum number of gradient descent iterations in the patch inverse
PatchSize	Size of an image patch for matching (in pixels). Normally, default
PatchStride	Stride between neighbor patches. Must be less than patch size. Lower
UseMeanNormalization	Whether to use mean-normalization of patches when computing patch
UseSpatialPropagation	Whether to use spatial propagation of good optical flow vectors.
VariationalRefinementAlpha	Weight of the smoothness term.
VariationalRefinementDelta	Weight of the color constancy term.
VariationalRefinementGamma	Weight of the gradient constancy term.
VariationalRefinementIterations	Number of fixed point iterations of variational refinement per scale.
id	Object ID

	addlistener	Add listener for event.
	calc	Calculates an optical flow
	collectGarbage	Releases all inner buffers
	delete	Destructor
	eq	== (EQ) Test handle equality.
	findobj	Find objects matching specified conditions.
	findprop	Find property of MATLAB handle object.
	ge	>= (GE) Greater than or equal relation for handles.
	gt	> (GT) Greater than relation for handles.
Sealed	isvalid	Test handle validity.
	le	<= (LE) Less than or equal relation for handles.
	listener	Add listener for event without binding the listener to the source object.
	lt	< (LT) Less than relation for handles.
	ne	~= (NE) Not equal relation for handles.
	notify	Notify listeners of event.