Class for computing SIFT features in a CByteImage. More...

#include <SIFTFeatureCalculator.h>

Inheritance diagram for CSIFTFeatureCalculator:

Public Member Functions
int	CalculateFeatures (const CByteImage pImage, CDynamicArray pResultList, bool bManageMemory=true)
	CSIFTFeatureCalculator (float fThreshold=0.05f, int nOctaves=3)
int	GetNumberOfOctaves ()
float	GetThreshold ()
void	SetNumberOfOctaves (int nOctaves)
void	SetThreshold (float fThreshold)
	~CSIFTFeatureCalculator ()
Static Public Member Functions
static void	CreateSIFTDescriptors (const CFloatMatrix pImage, CDynamicArray pResultList, float x, float y, float scale, float sigma, const float *pOrientationWeights, bool bManageMemory=true, bool bPerform80PercentCheck=true)
static void	CreateSIFTDescriptors (const CByteImage pImage, CDynamicArray pResultList, float x, float y, float scale=1.0f, bool bManageMemory=true, bool bPerform80PercentCheck=true)
static void	CreateSIFTDescriptors (const CByteImage *pImage, CDynamicArrayTemplatePointer< CFeatureEntry > &resultList, float x, float y, float scale=1.0f, bool bPerform80PercentCheck=true)
static void	InitializeVariables ()
Private Member Functions
void	FindScaleSpaceExtrema (const CFloatMatrix *pImage, float scale, int nOctave)
Static Private Member Functions
static void	DetermineDominatingOrientations (const CFloatMatrix pAngleMatrix, const CFloatMatrix pMagnitudeMatrix, CDynamicArrayTemplate< float > &orientations, bool bPerform80PercentCheck)
Private Attributes
bool	m_bManageMemory
float	m_fThreshold
int	m_nOctaves
CDynamicArray *	m_pResultList
Static Private Attributes
static float	diffk_ = sqrtf(k_ * k_ - 1)
static float	diffsigma0_ = SIGMA0 * SIGMA0 - prescaledsigma_ * prescaledsigma_
static float	edgethreshold_ = (EDGE_THRESHOLD + 1) * (EDGE_THRESHOLD + 1) / EDGE_THRESHOLD
static float	k_ = powf(2.0f, 1.0f / S)
static int	m_bInitialized = false
static float	prescaledsigma_ = PRESIGMA * PRESCALE
static float	SIFTDescriptorWeights [256]
static float	SIFTDiffSigmas [MAX_SCALES]
static float *	SIFTGaussianFilters [MAX_SCALES]
static int	SIFTKernelRadius [MAX_SCALES]
static float	SIFTOrientationWeights [256 *(MAX_SCALES+1)]
static int	SIFTPointers [256]
static float	SIFTSigmas [MAX_SCALES]
static float	SIFTWeights [256]

Detailed Description

Class for computing SIFT features in a CByteImage.

Definition at line 81 of file SIFTFeatureCalculator.h.

Constructor & Destructor Documentation

CSIFTFeatureCalculator::CSIFTFeatureCalculator	(	float	fThreshold = `0.05f`,
		int	nOctaves = `3`
	)

Definition at line 92 of file SIFTFeatureCalculator.cpp.

CSIFTFeatureCalculator::~CSIFTFeatureCalculator ( )

Definition at line 103 of file SIFTFeatureCalculator.cpp.

Member Function Documentation

int CSIFTFeatureCalculator::CalculateFeatures	(	const CByteImage *	pImage,
		CDynamicArray *	pResultList,
		bool	bManageMemory = `true`
	)		`[virtual]`

Implements CFeatureCalculatorInterface.

Definition at line 167 of file SIFTFeatureCalculator.cpp.

void CSIFTFeatureCalculator::CreateSIFTDescriptors	(	const CFloatMatrix *	pImage,
		CDynamicArray *	pResultList,
		float	x,
		float	y,
		float	scale,
		float	sigma,
		const float *	pOrientationWeights,
		bool	bManageMemory = `true`,
		bool	bPerform80PercentCheck = `true`
	)		`[static]`

Definition at line 279 of file SIFTFeatureCalculator.cpp.

void CSIFTFeatureCalculator::CreateSIFTDescriptors	(	const CByteImage *	pImage,
		CDynamicArray *	pResultList,
		float	x,
		float	y,
		float	scale = `1.0f`,
		bool	bManageMemory = `true`,
		bool	bPerform80PercentCheck = `true`
	)		`[static]`

Definition at line 392 of file SIFTFeatureCalculator.cpp.

void CSIFTFeatureCalculator::CreateSIFTDescriptors	(	const CByteImage *	pImage,
		CDynamicArrayTemplatePointer< CFeatureEntry > &	resultList,
		float	x,
		float	y,
		float	scale = `1.0f`,
		bool	bPerform80PercentCheck = `true`
	)		`[static]`

Definition at line 501 of file SIFTFeatureCalculator.cpp.

void CSIFTFeatureCalculator::DetermineDominatingOrientations	(	const CFloatMatrix *	pAngleMatrix,
		const CFloatMatrix *	pMagnitudeMatrix,
		CDynamicArrayTemplate< float > &	orientations,
		bool	bPerform80PercentCheck
	)		`[static, private]`