cv::gpu::SURF_GPU Class Reference

#include <gpu.hpp>

Public Types
enum	KeypointLayout {   X_ROW = 0, Y_ROW, LAPLACIAN_ROW, OCTAVE_ROW,   SIZE_ROW, ANGLE_ROW, HESSIAN_ROW, ROWS_COUNT }

Public Member Functions
	SURF_GPU ()
	the default constructor More...
	SURF_GPU (double _hessianThreshold, int _nOctaves=4, int _nOctaveLayers=2, bool _extended=false, float _keypointsRatio=0.01f, bool _upright=false)
	the full constructor taking all the necessary parameters More...
int	descriptorSize () const
	returns the descriptor size in float's (64 or 128) More...
void	uploadKeypoints (const std::vector< KeyPoint > &keypoints, GpuMat &keypointsGPU)
	upload host keypoints to device memory More...
void	downloadKeypoints (const GpuMat &keypointsGPU, std::vector< KeyPoint > &keypoints)
	download keypoints from device to host memory More...
void	downloadDescriptors (const GpuMat &descriptorsGPU, std::vector< float > &descriptors)
	download descriptors from device to host memory More...
void	operator() (const GpuMat &img, const GpuMat &mask, GpuMat &keypoints)
void	operator() (const GpuMat &img, const GpuMat &mask, GpuMat &keypoints, GpuMat &descriptors, bool useProvidedKeypoints=false)
void	operator() (const GpuMat &img, const GpuMat &mask, std::vector< KeyPoint > &keypoints)
void	operator() (const GpuMat &img, const GpuMat &mask, std::vector< KeyPoint > &keypoints, GpuMat &descriptors, bool useProvidedKeypoints=false)
void	operator() (const GpuMat &img, const GpuMat &mask, std::vector< KeyPoint > &keypoints, std::vector< float > &descriptors, bool useProvidedKeypoints=false)
void	releaseMemory ()

Public Attributes
double	hessianThreshold
int	nOctaves
int	nOctaveLayers
bool	extended
bool	upright
float	keypointsRatio
	max keypoints = min(keypointsRatio * img.size().area(), 65535) More...
GpuMat	sum
GpuMat	mask1
GpuMat	maskSum
GpuMat	intBuffer
GpuMat	det
GpuMat	trace
GpuMat	maxPosBuffer

Member Enumeration Documentation

enum cv::gpu::SURF_GPU::KeypointLayout

Enumerator
X_ROW
Y_ROW
LAPLACIAN_ROW
OCTAVE_ROW
SIZE_ROW
ANGLE_ROW
HESSIAN_ROW
ROWS_COUNT

Constructor & Destructor Documentation

cv::gpu::SURF_GPU::SURF_GPU

(

)

the default constructor

cv::gpu::SURF_GPU::SURF_GPU ( double  _hessianThreshold, int  _nOctaves = 4, int  _nOctaveLayers = 2, bool  _extended = false, float  _keypointsRatio = 0.01f, bool  _upright = false  )

explicit

the full constructor taking all the necessary parameters

Member Function Documentation

int cv::gpu::SURF_GPU::descriptorSize

(

)

const

returns the descriptor size in float's (64 or 128)

void cv::gpu::SURF_GPU::downloadDescriptors	(	const GpuMat &	descriptorsGPU,
		std::vector< float > &	descriptors
	)

download descriptors from device to host memory

void cv::gpu::SURF_GPU::downloadKeypoints	(	const GpuMat &	keypointsGPU,
		std::vector< KeyPoint > &	keypoints
	)

download keypoints from device to host memory

void cv::gpu::SURF_GPU::operator()	(	const GpuMat &	img,
		const GpuMat &	mask,
		GpuMat &	keypoints
	)

finds the keypoints using fast hessian detector used in SURF supports CV_8UC1 images keypoints will have nFeature cols and 6 rows keypoints.ptr<float>(X_ROW)[i] will contain x coordinate of i'th feature keypoints.ptr<float>(Y_ROW)[i] will contain y coordinate of i'th feature keypoints.ptr<float>(LAPLACIAN_ROW)[i] will contain laplacian sign of i'th feature keypoints.ptr<float>(OCTAVE_ROW)[i] will contain octave of i'th feature keypoints.ptr<float>(SIZE_ROW)[i] will contain size of i'th feature keypoints.ptr<float>(ANGLE_ROW)[i] will contain orientation of i'th feature keypoints.ptr<float>(HESSIAN_ROW)[i] will contain response of i'th feature

void cv::gpu::SURF_GPU::operator()	(	const GpuMat &	img,
		const GpuMat &	mask,
		GpuMat &	keypoints,
		GpuMat &	descriptors,
		bool	useProvidedKeypoints = false
	)

finds the keypoints and computes their descriptors. Optionally it can compute descriptors for the user-provided keypoints and recompute keypoints direction

void cv::gpu::SURF_GPU::operator()	(	const GpuMat &	img,
		const GpuMat &	mask,
		std::vector< KeyPoint > &	keypoints
	)

void cv::gpu::SURF_GPU::operator()	(	const GpuMat &	img,
		const GpuMat &	mask,
		std::vector< KeyPoint > &	keypoints,
		GpuMat &	descriptors,
		bool	useProvidedKeypoints = false
	)

void cv::gpu::SURF_GPU::operator()	(	const GpuMat &	img,
		const GpuMat &	mask,
		std::vector< KeyPoint > &	keypoints,
		std::vector< float > &	descriptors,
		bool	useProvidedKeypoints = false
	)

void cv::gpu::SURF_GPU::releaseMemory

(

)

void cv::gpu::SURF_GPU::uploadKeypoints	(	const std::vector< KeyPoint > &	keypoints,
		GpuMat &	keypointsGPU
	)

upload host keypoints to device memory

Member Data Documentation

GpuMat cv::gpu::SURF_GPU::det

bool cv::gpu::SURF_GPU::extended

double cv::gpu::SURF_GPU::hessianThreshold

GpuMat cv::gpu::SURF_GPU::intBuffer

float cv::gpu::SURF_GPU::keypointsRatio

max keypoints = min(keypointsRatio * img.size().area(), 65535)

GpuMat cv::gpu::SURF_GPU::mask1

GpuMat cv::gpu::SURF_GPU::maskSum

GpuMat cv::gpu::SURF_GPU::maxPosBuffer

int cv::gpu::SURF_GPU::nOctaveLayers

int cv::gpu::SURF_GPU::nOctaves

GpuMat cv::gpu::SURF_GPU::sum

GpuMat cv::gpu::SURF_GPU::trace

bool cv::gpu::SURF_GPU::upright

---

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

• nonfree/include/opencv2/nonfree/gpu.hpp