DBoW2::FSift128 Class Reference

Functions to manipulate SIFT descriptors. More...

#include <FSift128.h>

Inheritance diagram for DBoW2::FSift128:

Collaboration diagram for DBoW2::FSift128:

Public Types
using	TDescriptor = std::vector< float >
	Descriptor type.
using	pDescriptor = const TDescriptor *
	Pointer to a single descriptor.

Static Public Member Functions
static constexpr int	dimensions ()
	Returns the number of dimensions of the descriptor space. More...
static void	meanValue (const std::vector< pDescriptor > &descriptors, TDescriptor &mean)
	Calculates the mean value of a set of descriptors. More...
static double	distance (const TDescriptor &a, const TDescriptor &b)
	Calculates the (squared) distance between two descriptors. More...
static std::string	toString (const TDescriptor &a)
	Returns a string version of the descriptor. More...
static void	fromString (TDescriptor &a, const std::string &s)
	Returns a descriptor from a string. More...
static void	toMat32F (const std::vector< TDescriptor > &descriptors, cv::Mat &mat)
	Returns a mat with the descriptors in float format. More...
static void	fromMat32F (const cv::Mat &mat, std::vector< TDescriptor > &descriptors)
	construct descriptors with the mat in float format. More...
static std::vector< TDescriptor >	fromMat32F (const cv::Mat &mat)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Static Public Attributes
static constexpr int	L = 128
	Descriptor length.

Detailed Description

Functions to manipulate SIFT descriptors.

Member Function Documentation

dimensions()

static constexpr int DBoW2::FSift128::dimensions ( )

inlinestaticconstexpr

Returns the number of dimensions of the descriptor space.

Returns

dimensions

distance()

double DBoW2::FSift128::distance ( const TDescriptor &  a, const TDescriptor &  b  )

static

Calculates the (squared) distance between two descriptors.

Parameters

a
b

Returns

(squared) distance

fromMat32F()

void DBoW2::FSift128::fromMat32F ( const cv::Mat &  mat, std::vector< TDescriptor > &  descriptors  )

static

construct descriptors with the mat in float format.

Parameters

mat	(in) NxL 32F matrix
descriptors

fromString()

void DBoW2::FSift128::fromString ( FSift128::TDescriptor &  a, const std::string &  s  )

static

Returns a descriptor from a string.

Parameters

a	descriptor
s	string version

meanValue()

void DBoW2::FSift128::meanValue ( const std::vector< pDescriptor > &  descriptors, TDescriptor &  mean  )

static

Calculates the mean value of a set of descriptors.

Parameters

descriptors	vector of pointers to descriptors
mean	mean descriptor

toMat32F()

void DBoW2::FSift128::toMat32F ( const std::vector< TDescriptor > &  descriptors, cv::Mat &  mat  )

static

Returns a mat with the descriptors in float format.

Parameters

descriptors
mat	(out) NxL 32F matrix

toString()

std::string DBoW2::FSift128::toString ( const TDescriptor &  a )

static

Returns a string version of the descriptor.

Parameters

a	descriptor

Returns

string version

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

• C:/Users/ZhouZishun/Documents/Workspace/EasyMVS/core/FeatureExtraction/FSift128.h
• C:/Users/ZhouZishun/Documents/Workspace/EasyMVS/core/FeatureExtraction/FSift128.cpp