C:/Yann Dumortier/LKCudaLib/GPULK/LKCuda.h File Reference

pyramidal implementation of Lucas & Kanade optical flow with CUDA. More...

#include <cuda.h>
#include <cuda_runtime.h>
#include <cutil.h>

Functions
void	LKCudaInit (unsigned nLevels, unsigned width, unsigned height)
	initialization function. function that allocates all cuda arrays needed, according to the level number and the image resolution.
void	LKCudaRun (cudaArray *image1, cudaArray *image2, cudaArray *vX, cudaArray *vY, unsigned nIter, unsigned win, float alpha, bool cc)
	Lucas & Kanade optical flow computation.
void	LKCudaFree ()
	memory free.

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Detailed Description

pyramidal implementation of Lucas & Kanade optical flow with CUDA.

Version:

1.1

Date:

09-2008

Author:

Julien MARZAT (INRIA/ENSEM)

Yann DUMORTIER (INRIA/ENSMP)

<firstname>.<lastname>@gmail.com

Todo:

comment and clean source code before openning it.

Todo:

multiple GPUs version.

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Function Documentation

void LKCudaInit	(	unsigned	nLevels,
		unsigned	width,
		unsigned	height
	)

initialization function. function that allocates all cuda arrays needed, according to the level number and the image resolution.

Parameters:

	nLevels	number of level (pyramid size), at least equals to 1.
	width	width of input images.
	height	height of input images.

void LKCudaRun	(	cudaArray *	image1,
		cudaArray *	image2,
		cudaArray *	vX,
		cudaArray *	vY,
		unsigned	nIter,
		unsigned	win,
		float	alpha,
		bool	cc
	)

Lucas & Kanade optical flow computation.

Parameters:

	image1	pointer to the first image stored on the GPU.
	image2	pointer to the second image stored on the GPU.
	vX	pointer to the x-velocities on CUDA array.
	vY	pointer to the y-velocities on CUDA array.
	nIter	iteration number.
	win	patch size.
	alpha	regularization parameter, typically 0.00001f.
	cc	if different to 0 vX and vY are used to init the first pyramid level.