OpenCV  4.5.1-pre
Open Source Computer Vision
Public Member Functions | Static Public Member Functions | List of all members
cv::AffineFeature Class Referenceabstract

Class for implementing the wrapper which makes detectors and extractors to be affine invariant, described as ASIFT in [274] . More...

#include <opencv2/features2d.hpp>

Inheritance diagram for cv::AffineFeature:
cv::Feature2D cv::Algorithm

Public Member Functions

virtual String getDefaultName () const CV_OVERRIDE
 
virtual void getViewParams (std::vector< float > &tilts, std::vector< float > &rolls) const =0
 
virtual void setViewParams (const std::vector< float > &tilts, const std::vector< float > &rolls)=0
 
- Public Member Functions inherited from cv::Feature2D
virtual ~Feature2D ()
 
virtual void compute (InputArray image, std::vector< KeyPoint > &keypoints, OutputArray descriptors)
 Computes the descriptors for a set of keypoints detected in an image (first variant) or image set (second variant). More...
 
virtual void compute (InputArrayOfArrays images, std::vector< std::vector< KeyPoint > > &keypoints, OutputArrayOfArrays descriptors)
 
virtual int defaultNorm () const
 
virtual int descriptorSize () const
 
virtual int descriptorType () const
 
virtual void detect (InputArray image, std::vector< KeyPoint > &keypoints, InputArray mask=noArray())
 Detects keypoints in an image (first variant) or image set (second variant). More...
 
virtual void detect (InputArrayOfArrays images, std::vector< std::vector< KeyPoint > > &keypoints, InputArrayOfArrays masks=noArray())
 
virtual void detectAndCompute (InputArray image, InputArray mask, std::vector< KeyPoint > &keypoints, OutputArray descriptors, bool useProvidedKeypoints=false)
 
virtual bool empty () const CV_OVERRIDE
 Return true if detector object is empty. More...
 
void read (const String &fileName)
 
virtual void read (const FileNode &) CV_OVERRIDE
 Reads algorithm parameters from a file storage. More...
 
void write (const String &fileName) const
 
virtual void write (FileStorage &) const CV_OVERRIDE
 Stores algorithm parameters in a file storage. More...
 
void write (const Ptr< FileStorage > &fs, const String &name=String()) const
 
- Public Member Functions inherited from cv::Algorithm
 Algorithm ()
 
virtual ~Algorithm ()
 
virtual void clear ()
 Clears the algorithm state. More...
 
virtual void save (const String &filename) const
 
void write (const Ptr< FileStorage > &fs, const String &name=String()) const
 simplified API for language bindings This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
 

Static Public Member Functions

static Ptr< AffineFeaturecreate (const Ptr< Feature2D > &backend, int maxTilt=5, int minTilt=0, float tiltStep=1.4142135623730951f, float rotateStepBase=72)
 
- Static Public Member Functions inherited from cv::Algorithm
template<typename _Tp >
static Ptr< _Tp > load (const String &filename, const String &objname=String())
 Loads algorithm from the file. More...
 
template<typename _Tp >
static Ptr< _Tp > loadFromString (const String &strModel, const String &objname=String())
 Loads algorithm from a String. More...
 
template<typename _Tp >
static Ptr< _Tp > read (const FileNode &fn)
 Reads algorithm from the file node. More...
 

Additional Inherited Members

- Protected Member Functions inherited from cv::Algorithm
void writeFormat (FileStorage &fs) const
 

Detailed Description

Class for implementing the wrapper which makes detectors and extractors to be affine invariant, described as ASIFT in [274] .

Member Function Documentation

◆ create()

static Ptr<AffineFeature> cv::AffineFeature::create ( const Ptr< Feature2D > &  backend,
int  maxTilt = 5,
int  minTilt = 0,
float  tiltStep = 1.4142135623730951f,
float  rotateStepBase = 72 
)
static
Python:
retval=cv.AffineFeature_create(backend[, maxTilt[, minTilt[, tiltStep[, rotateStepBase]]]])
Parameters
backendThe detector/extractor you want to use as backend.
maxTiltThe highest power index of tilt factor. 5 is used in the paper as tilt sampling range n.
minTiltThe lowest power index of tilt factor. 0 is used in the paper.
tiltStepTilt sampling step \(\delta_t\) in Algorithm 1 in the paper.
rotateStepBaseRotation sampling step factor b in Algorithm 1 in the paper.

◆ getDefaultName()

virtual String cv::AffineFeature::getDefaultName ( ) const
virtual
Python:
retval=cv.AffineFeature.getDefaultName()

Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string.

Reimplemented from cv::Feature2D.

◆ getViewParams()

virtual void cv::AffineFeature::getViewParams ( std::vector< float > &  tilts,
std::vector< float > &  rolls 
) const
pure virtual
Python:
None=cv.AffineFeature.getViewParams(tilts, rolls)

◆ setViewParams()

virtual void cv::AffineFeature::setViewParams ( const std::vector< float > &  tilts,
const std::vector< float > &  rolls 
)
pure virtual
Python:
None=cv.AffineFeature.setViewParams(tilts, rolls)

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