SIFTFeatureDetector Class Reference

#include <ImFusion/Vision/FeatureDetection.h>

Implementation of the SIFT feature detection and description algorithm. More...

Inheritance diagram for SIFTFeatureDetector:

Detailed Description

Implementation of the SIFT feature detection and description algorithm.

Public Member Functions
	SIFTFeatureDetector ()
	Default constructor.
	~SIFTFeatureDetector ()
	Destructor.
std::string	name () const override
	Return name of detector.
std::vector< Keypoint >	detect (SharedImage &img) override
	Detect SIFT keypoints in image.
bool	setMaxFeatures (int v) override
	Set maximum number of features.
int	maxFeatures () const override
	Get maximum number of features.
void	setThreshold (double threshold) override
	Set contrast threshold.
double	threshold () const override
	Get contrast threshold.
Public Member Functions inherited from FeatureDetectorWithAdaptiveThreshold
	FeatureDetectorWithAdaptiveThreshold ()
	Default constructor.
std::vector< Keypoint >	detectAdaptive (SharedImage &img)
	Runs the detection by iteratively adapting a max number of features and a threshold.
virtual std::unique_ptr< KeyPointIterator >	initKeypointIterator (const std::vector< Keypoint > &keypoints)
	Instantiate keypoint iterator, can be overridden for custom sorting.
void	configure (const Properties *p) override
	Configure parameters from properties.
Public Member Functions inherited from Configurable
virtual void	configuration (Properties *p) const
	Serialize the current object configuration into the given Properties object.
virtual void	configureDefaults ()
	Retrieve the properties of this object, replaces values with their defaults and sets it again.
void	registerParameter (ParameterBase *param)
	Register the given Parameter or SubProperty, so that it will be configured during configure()/configuration().
void	unregisterParameter (const ParameterBase *param)
	Remove the given Parameter or SubProperty from the list of registered parameters.
	Configurable (const Configurable &rhs)
	Configurable (Configurable &&rhs) noexcept
Configurable &	operator= (const Configurable &)
Configurable &	operator= (Configurable &&) noexcept

Public Attributes
Parameter< double >	p_contrastThreshold = {"Contrast threshold", 0.04, this}
	SIFT contrast threshold.
Parameter< int >	p_nFeatures = {"Max features", 500, this}
	Maximum number of features.
Parameter< int >	p_nOctaveLayers = {"Octave layers", 3, this}
	Number of octave layers.
Parameter< double >	p_edgeThreshold = {"Edge threshold", 10, this}
	Edge threshold.
Parameter< double >	p_sigma = {"Sigma", 1.6, this}
	Sigma for Gaussian smoothing.
Public Attributes inherited from FeatureDetectorWithAdaptiveThreshold
Parameter< bool >	p_adaptThreshold = {"Iteratively adapt threshold", false, this}
	Enable adaptive threshold.
Parameter< int >	p_cellSize = {"Grid cell size", 100, this}
	Size of grid cell for adaptive threshold.
Parameter< double >	p_minThreshold = {"Minimum threshold", 0.0, this}
	Minimum threshold value.
Parameter< double >	p_thresholdStep = {"Threshold step", 0.0, this}
	Step size for threshold adaptation.
Public Attributes inherited from Configurable
Signal	signalParametersChanged
	Emitted whenever one of the registered Parameters' or SubPropertys' signalValueChanged signal was emitted.

Additional Inherited Members
Protected Attributes inherited from Configurable
std::vector< Param >	m_params
	List of all registered Parameter and SubProperty instances.

Member Function Documentation

name()

std::string name ( ) const

inlineoverridevirtual

Return name of detector.

Implements FeatureDetector.

detect()

std::vector< Keypoint > detect ( SharedImage & img )

overridevirtual

Detect SIFT keypoints in image.

Parameters

img	SharedImage to detect features in.

Returns

Vector of detected keypoints.

Implements FeatureDetector.

setMaxFeatures()

bool setMaxFeatures ( int v )

inlineoverridevirtual

Set maximum number of features.

Parameters

v	Maximum number of features.

Returns

Always true.

Implements FeatureDetectorWithAdaptiveThreshold.

maxFeatures()

int maxFeatures ( ) const

inlineoverridevirtual

Get maximum number of features.

Implements FeatureDetectorWithAdaptiveThreshold.

setThreshold()

void setThreshold ( double threshold )

inlineoverridevirtual

Set contrast threshold.

Parameters

threshold

Contrast threshold value.

Implements FeatureDetectorWithAdaptiveThreshold.

threshold()

double threshold ( ) const

inlineoverridevirtual

Get contrast threshold.

Implements FeatureDetectorWithAdaptiveThreshold.

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

• ImFusion/Vision/FeatureDetection.h