Dense SIFT (Dense Scale Invariant Feature Transform (DSIFT)) More...

#include "generic.h"

Data Structures
struct	VlDsiftKeypoint
	Dense SIFT keypoint. More...

struct	VlDsiftDescriptorGeometry
	Dense SIFT descriptor geometry. More...

struct	VlDsiftFilter
	Dense SIFT filter. More...

Functions
VlDsiftFilter *	vl_dsift_new (int width, int height)
	Create a new DSIFT filter. More...

VlDsiftFilter *	vl_dsift_new_basic (int width, int height, int step, int binSize)
	Create a new DSIFT filter (basic interface) More...

void	vl_dsift_delete (VlDsiftFilter *self)
	Delete DSIFT filter. More...

void	vl_dsift_process (VlDsiftFilter self, float const im)
	Compute keypoints and descriptors. More...

void	vl_dsift_transpose_descriptor (float dst, float const src, int numBinT, int numBinX, int numBinY)
	Transpose descriptor. More...

void	_vl_dsift_update_buffers (VlDsiftFilter *self)
	Updates internal buffers to current geometry. More...

Setting parameters
void	vl_dsift_set_steps (VlDsiftFilter *self, int stepX, int stepY)
	Set steps. More...

void	vl_dsift_set_bounds (VlDsiftFilter *self, int minX, int minY, int maxX, int maxY)
	Set bounds. More...

void	vl_dsift_set_geometry (VlDsiftFilter self, VlDsiftDescriptorGeometry const geom)
	Set SIFT descriptor geometry. More...

void	vl_dsift_set_flat_window (VlDsiftFilter *self, vl_bool useFlatWindow)
	Set flat window flag. More...

void	vl_dsift_set_window_size (VlDsiftFilter *self, double windowSize)
	Set SIFT descriptor Gaussian window size. More...

Retrieving data and parameters
float const *	vl_dsift_get_descriptors (VlDsiftFilter const *self)
	Get descriptors. More...

int	vl_dsift_get_descriptor_size (VlDsiftFilter const *self)
	Get descriptor size. More...

int	vl_dsift_get_keypoint_num (VlDsiftFilter const *self)
	Get number of keypoints. More...

VlDsiftKeypoint const *	vl_dsift_get_keypoints (VlDsiftFilter const *self)
	Get keypoints. More...

void	vl_dsift_get_bounds (VlDsiftFilter const self, int minX, int minY, int maxX, int *maxY)
	Get bounds. More...

void	vl_dsift_get_steps (VlDsiftFilter const self, int stepX, int *stepY)
	Get steps. More...

VlDsiftDescriptorGeometry const *	vl_dsift_get_geometry (VlDsiftFilter const *self)
	Get SIFT descriptor geometry. More...

vl_bool	vl_dsift_get_flat_window (VlDsiftFilter const *self)
	Get flat window flag. More...

double	vl_dsift_get_window_size (VlDsiftFilter const *self)
	Get SIFT descriptor Gaussian window size. More...

Detailed Description

Author: Andrea Vedaldi; Brian Fulkerson

Function Documentation

◆ _vl_dsift_update_buffers()

void _vl_dsift_update_buffers ( VlDsiftFilter * self )

◆ vl_dsift_delete()

void vl_dsift_delete ( VlDsiftFilter * self )

Parameters

self	DSIFT filter.

◆ vl_dsift_get_bounds()

void vl_dsift_get_bounds	(	VlDsiftFilter const *	self,
		int *	minX,
		int *	minY,
		int *	maxX,
		int *	maxY
	)

inline

Parameters

self	DSIFT filter object.
minX	bounding box minimum X coordinate.
minY	bounding box minimum Y coordinate.
maxX	bounding box maximum X coordinate.
maxY	bounding box maximum Y coordinate.

◆ vl_dsift_get_descriptor_size()

int vl_dsift_get_descriptor_size ( VlDsiftFilter const * self )

inline

Parameters

self	DSIFT filter object.

Returns: size of a descriptor.

◆ vl_dsift_get_descriptors()

float const * vl_dsift_get_descriptors ( VlDsiftFilter const * self )

inline

Parameters

self	DSIFT filter object.

Returns: descriptors.

◆ vl_dsift_get_flat_window()

int vl_dsift_get_flat_window ( VlDsiftFilter const * self )

inline

Parameters

self	DSIFT filter object.

Returns: TRUE if the DSIFT filter uses a flat window.

◆ vl_dsift_get_geometry()

VlDsiftDescriptorGeometry const * vl_dsift_get_geometry ( VlDsiftFilter const * self )

inline

Parameters

self	DSIFT filter object.

Returns: DSIFT descriptor geometry.

◆ vl_dsift_get_keypoint_num()

int vl_dsift_get_keypoint_num ( VlDsiftFilter const * self )

inline

Parameters

self	DSIFT filter object.

◆ vl_dsift_get_keypoints()

VlDsiftKeypoint const * vl_dsift_get_keypoints ( VlDsiftFilter const * self )

inline

Parameters

self	DSIFT filter object.

◆ vl_dsift_get_steps()

void vl_dsift_get_steps	(	VlDsiftFilter const *	self,
		int *	stepX,
		int *	stepY
	)

inline

Parameters

self	DSIFT filter object.
stepX	sampling step along X.
stepY	sampling step along Y.

◆ vl_dsift_get_window_size()

double vl_dsift_get_window_size ( VlDsiftFilter const * self )

inline

Parameters

self	DSIFT filter object.

Returns: window size.

◆ vl_dsift_new()

VlDsiftFilter* vl_dsift_new	(	int	imWidth,
		int	imHeight
	)

Parameters

imWidth	width of the image.
imHeight	height of the image

Returns: new filter.

◆ vl_dsift_new_basic()

VlDsiftFilter* vl_dsift_new_basic	(	int	imWidth,
		int	imHeight,
		int	step,
		int	binSize
	)

Parameters

imWidth	width of the image.
imHeight	height of the image.
step	sampling step.
binSize	bin size.

Returns: new filter.

The descriptor geometry matches the standard SIFT descriptor.

◆ vl_dsift_process()

void vl_dsift_process	(	VlDsiftFilter *	self,
		float const *	im
	)

Parameters

self	DSIFT filter.
im	image data.

◆ vl_dsift_set_bounds()

void vl_dsift_set_bounds	(	VlDsiftFilter *	self,
		int	minX,
		int	minY,
		int	maxX,
		int	maxY
	)

inline

Parameters

self	DSIFT filter object.
minX	bounding box minimum X coordinate.
minY	bounding box minimum Y coordinate.
maxX	bounding box maximum X coordinate.
maxY	bounding box maximum Y coordinate.

◆ vl_dsift_set_flat_window()

void vl_dsift_set_flat_window	(	VlDsiftFilter *	self,
		vl_bool	useFlatWindow
	)

inline

Parameters

self	DSIFT filter object.
useFlatWindow	`true` if the DSIFT filter should use a flat window.

◆ vl_dsift_set_geometry()

void vl_dsift_set_geometry	(	VlDsiftFilter *	self,
		VlDsiftDescriptorGeometry const *	geom
	)

inline

Parameters

self	DSIFT filter object.
geom	descriptor geometry parameters.

◆ vl_dsift_set_steps()

void vl_dsift_set_steps	(	VlDsiftFilter *	self,
		int	stepX,
		int	stepY
	)

inline

Parameters

self	DSIFT filter object.
stepX	sampling step along X.
stepY	sampling step along Y.

◆ vl_dsift_set_window_size()

void vl_dsift_set_window_size	(	VlDsiftFilter *	self,
		double	windowSize
	)

inline

Parameters

self	DSIFT filter object.
windowSize	window size.

◆ vl_dsift_transpose_descriptor()

void vl_dsift_transpose_descriptor	(	float *	dst,
		float const *	src,
		int	numBinT,
		int	numBinX,
		int	numBinY
	)

inline

Parameters

dst	destination buffer.
src	source buffer.
numBinT
numBinX
numBinY	The function writes to dst the transpose of the SIFT descriptor src. Let `I` be an image. The transpose operator satisfies the equation `transpose(dsift(I,x,y)) = dsift(transpose(I),y,x)`

VLFeat.org

Data Structures

Functions

Detailed Description

Function Documentation

◆ _vl_dsift_update_buffers()

◆ vl_dsift_delete()

◆ vl_dsift_get_bounds()

◆ vl_dsift_get_descriptor_size()

◆ vl_dsift_get_descriptors()

◆ vl_dsift_get_flat_window()

◆ vl_dsift_get_geometry()

◆ vl_dsift_get_keypoint_num()

◆ vl_dsift_get_keypoints()

◆ vl_dsift_get_steps()

◆ vl_dsift_get_window_size()

◆ vl_dsift_new()

◆ vl_dsift_new_basic()

◆ vl_dsift_process()

◆ vl_dsift_set_bounds()

◆ vl_dsift_set_flat_window()

◆ vl_dsift_set_geometry()

◆ vl_dsift_set_steps()

◆ vl_dsift_set_window_size()

◆ vl_dsift_transpose_descriptor()