OpenCV  4.5.0-pre
Open Source Computer Vision
Public Member Functions | Static Public Member Functions | Protected Member Functions | List of all members

Marr-Hildreth Operator Based Hash, slowest but more discriminative. More...

#include <opencv2/img_hash/marr_hildreth_hash.hpp>

Inheritance diagram for cv::img_hash::MarrHildrethHash:
cv::img_hash::ImgHashBase cv::Algorithm

Public Member Functions

float getAlpha () const
 self explain More...
 
float getScale () const
 self explain More...
 
void setKernelParam (float alpha, float scale)
 Set Mh kernel parameters. More...
 
- Public Member Functions inherited from cv::img_hash::ImgHashBase
 ~ImgHashBase ()
 
double compare (cv::InputArray hashOne, cv::InputArray hashTwo) const
 Compare the hash value between inOne and inTwo. More...
 
void compute (cv::InputArray inputArr, cv::OutputArray outputArr)
 Computes hash of the input image. More...
 
- Public Member Functions inherited from cv::Algorithm
 Algorithm ()
 
virtual ~Algorithm ()
 
virtual void clear ()
 Clears the algorithm state. More...
 
virtual bool empty () const
 Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read. More...
 
virtual String getDefaultName () const
 
virtual void read (const FileNode &fn)
 Reads algorithm parameters from a file storage. More...
 
virtual void save (const String &filename) const
 
virtual void write (FileStorage &fs) const
 Stores algorithm parameters in a file storage. More...
 
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< MarrHildrethHashcreate (float alpha=2.0f, float scale=1.0f)
 
- 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...
 

Protected Member Functions

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

Additional Inherited Members

- Protected Attributes inherited from cv::img_hash::ImgHashBase
Ptr< ImgHashImpl > pImpl
 

Detailed Description

Marr-Hildreth Operator Based Hash, slowest but more discriminative.

See [275] for details.

Constructor & Destructor Documentation

◆ MarrHildrethHash()

cv::img_hash::MarrHildrethHash::MarrHildrethHash ( )
inlineprotected

Member Function Documentation

◆ create()

static Ptr<MarrHildrethHash> cv::img_hash::MarrHildrethHash::create ( float  alpha = 2.0f,
float  scale = 1.0f 
)
static
Python:
retval=cv.img_hash.MarrHildrethHash_create([, alpha[, scale]])
Parameters
alphaint scale factor for marr wavelet (default=2).
scaleint level of scale factor (default = 1)

◆ getAlpha()

float cv::img_hash::MarrHildrethHash::getAlpha ( ) const
Python:
retval=cv.img_hash_MarrHildrethHash.getAlpha()

self explain

◆ getScale()

float cv::img_hash::MarrHildrethHash::getScale ( ) const
Python:
retval=cv.img_hash_MarrHildrethHash.getScale()

self explain

◆ setKernelParam()

void cv::img_hash::MarrHildrethHash::setKernelParam ( float  alpha,
float  scale 
)
Python:
None=cv.img_hash_MarrHildrethHash.setKernelParam(alpha, scale)

Set Mh kernel parameters.

Parameters
alphaint scale factor for marr wavelet (default=2).
scaleint level of scale factor (default = 1)

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