cv::gpu::OpticalFlowDual_TVL1_GPU Class Reference

#include <gpu.hpp>

Public Member Functions
	OpticalFlowDual_TVL1_GPU ()
void	operator() (const GpuMat &I0, const GpuMat &I1, GpuMat &flowx, GpuMat &flowy)
void	collectGarbage ()

Public Attributes
double	tau
double	lambda
double	theta
int	nscales
int	warps
double	epsilon
int	iterations
bool	useInitialFlow

Constructor & Destructor Documentation

cv::gpu::OpticalFlowDual_TVL1_GPU::OpticalFlowDual_TVL1_GPU

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Member Function Documentation

void cv::gpu::OpticalFlowDual_TVL1_GPU::collectGarbage

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void cv::gpu::OpticalFlowDual_TVL1_GPU::operator()	(	const GpuMat &	I0,
		const GpuMat &	I1,
		GpuMat &	flowx,
		GpuMat &	flowy
	)

Member Data Documentation

double cv::gpu::OpticalFlowDual_TVL1_GPU::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.

int cv::gpu::OpticalFlowDual_TVL1_GPU::iterations

Stopping criterion iterations number used in the numerical scheme.

double cv::gpu::OpticalFlowDual_TVL1_GPU::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.

int cv::gpu::OpticalFlowDual_TVL1_GPU::nscales

Number of scales used to create the pyramid of images.

double cv::gpu::OpticalFlowDual_TVL1_GPU::tau

Time step of the numerical scheme.

double cv::gpu::OpticalFlowDual_TVL1_GPU::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.

bool cv::gpu::OpticalFlowDual_TVL1_GPU::useInitialFlow

int cv::gpu::OpticalFlowDual_TVL1_GPU::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.

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

• gpu/include/opencv2/gpu/gpu.hpp