Function:OpticalFlowHS

Function

CuviStatus opticalFlowHS(const CuviImage& previous, const CuviImage& next, Cuvi32f* flowX, Cuvi32f* flowY, const bool usePrevious, const Cuvi32f lambda = 1.0f , const Cuvi32s iterations = 1, const CuviStream& stream = CuviStream());

Parameters

Name	Type	Description
previous	const CuviImage&	The first image whose features are to be tracked
next	const CuviImage&	Second image, in which to look for features of first image
flowX	Cuvi32f*	Horizontal velocity vector
flowY	Cuvi32f*	Vertical velocity vector
usePrevious	bool	use previous (input) velocity field
lambda	const Cuvi32f	Lagrangian multiplier
iterations	const Cuvi32s	Maximum number of iterations
stream	CuviStream*	GPU stream ID for execution

Image Type Support

Input	Output
8uC1	32fC1

Sample

Example

//Create two 8-bit Grays-scale CuviImage CuviImage gimg1 = cuvi::io::loadImage(path,CUVI_LOAD_IMAGE_GRAYSCALE); CuviImage gimg2 = cuvi::io::loadImage(path,CUVI_LOAD_IMAGE_GRAYSCALE); //Create output memory Cuvi32f* u = new Cuvi32f[gimg.width() * gimg.height()]; Cuvi32f* v = new Cuvi32f[gimg.width() * gimg.height()]; //Calculates flow of each image pixel in two frames using Horn–Schunck method cuvi::computerVision::opticalFlowHS(gimg1,gimg2,u,v,false);