OpenCV  4.1.1-pre
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cv::MergeMertens Class Referenceabstract

Pixels are weighted using contrast, saturation and well-exposedness measures, than images are combined using laplacian pyramids. More...

#include <opencv2/photo.hpp>

Inheritance diagram for cv::MergeMertens:
Collaboration diagram for cv::MergeMertens:

Public Member Functions

virtual void clear ()
 Clears the algorithm state. More...
 
virtual bool empty () const
 Returns true if the Algorithm is empty (e.g. More...
 
virtual float getContrastWeight () const =0
 
virtual String getDefaultName () const
 Returns the algorithm string identifier. More...
 
virtual float getExposureWeight () const =0
 
virtual float getSaturationWeight () const =0
 
virtual void process (InputArrayOfArrays src, OutputArray dst, InputArray times, InputArray response) CV_OVERRIDE=0
 Merges images. More...
 
virtual void process (InputArrayOfArrays src, OutputArray dst)=0
 Short version of process, that doesn't take extra arguments. More...
 
virtual void read (const FileNode &fn)
 Reads algorithm parameters from a file storage. More...
 
virtual void save (const String &filename) const
 Saves the algorithm to a file. More...
 
virtual void setContrastWeight (float contrast_weiht)=0
 
virtual void setExposureWeight (float exposure_weight)=0
 
virtual void setSaturationWeight (float saturation_weight)=0
 
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

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

void writeFormat (FileStorage &fs) const
 

Detailed Description

Pixels are weighted using contrast, saturation and well-exposedness measures, than images are combined using laplacian pyramids.

The resulting image weight is constructed as weighted average of contrast, saturation and well-exposedness measures.

The resulting image doesn't require tonemapping and can be converted to 8-bit image by multiplying by 255, but it's recommended to apply gamma correction and/or linear tonemapping.

For more information see [66] .

Member Function Documentation

◆ clear()

virtual void cv::Algorithm::clear ( )
inlinevirtualinherited

Clears the algorithm state.

Reimplemented in cv::FlannBasedMatcher, and cv::DescriptorMatcher.

◆ empty()

virtual bool cv::Algorithm::empty ( ) const
inlinevirtualinherited

Returns true if the Algorithm is empty (e.g.

in the very beginning or after unsuccessful read

Reimplemented in cv::DescriptorMatcher, cv::ml::StatModel, cv::Feature2D, and cv::BaseCascadeClassifier.

◆ getContrastWeight()

virtual float cv::MergeMertens::getContrastWeight ( ) const
pure virtual

◆ getDefaultName()

virtual String cv::Algorithm::getDefaultName ( ) const
virtualinherited

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 in cv::AKAZE, cv::KAZE, cv::SimpleBlobDetector, cv::GFTTDetector, cv::AgastFeatureDetector, cv::FastFeatureDetector, cv::MSER, cv::ORB, cv::BRISK, and cv::Feature2D.

◆ getExposureWeight()

virtual float cv::MergeMertens::getExposureWeight ( ) const
pure virtual

◆ getSaturationWeight()

virtual float cv::MergeMertens::getSaturationWeight ( ) const
pure virtual

◆ load()

template<typename _Tp >
static Ptr<_Tp> cv::Algorithm::load ( const String filename,
const String objname = String() 
)
inlinestaticinherited

Loads algorithm from the file.

Parameters
filenameName of the file to read.
objnameThe optional name of the node to read (if empty, the first top-level node will be used)

This is static template method of Algorithm. It's usage is following (in the case of SVM):

Ptr<SVM> svm = Algorithm::load<SVM>("my_svm_model.xml");

In order to make this method work, the derived class must overwrite Algorithm::read(const FileNode& fn).

References CV_Assert, cv::FileNode::empty(), cv::FileStorage::getFirstTopLevelNode(), cv::FileStorage::isOpened(), and cv::FileStorage::READ.

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◆ loadFromString()

template<typename _Tp >
static Ptr<_Tp> cv::Algorithm::loadFromString ( const String strModel,
const String objname = String() 
)
inlinestaticinherited

Loads algorithm from a String.

Parameters
strModelThe string variable containing the model you want to load.
objnameThe optional name of the node to read (if empty, the first top-level node will be used)

This is static template method of Algorithm. It's usage is following (in the case of SVM):

Ptr<SVM> svm = Algorithm::loadFromString<SVM>(myStringModel);

References CV_WRAP, cv::FileNode::empty(), cv::FileStorage::getFirstTopLevelNode(), cv::FileStorage::MEMORY, and cv::FileStorage::READ.

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◆ process() [1/2]

virtual void cv::MergeMertens::process ( InputArrayOfArrays  src,
OutputArray  dst,
InputArray  times,
InputArray  response 
)
pure virtual

Merges images.

Parameters
srcvector of input images
dstresult image
timesvector of exposure time values for each image
response256x1 matrix with inverse camera response function for each pixel value, it should have the same number of channels as images.

Implements cv::MergeExposures.

◆ process() [2/2]

virtual void cv::MergeMertens::process ( InputArrayOfArrays  src,
OutputArray  dst 
)
pure virtual

Short version of process, that doesn't take extra arguments.

Parameters
srcvector of input images
dstresult image

◆ read() [1/2]

virtual void cv::Algorithm::read ( const FileNode fn)
inlinevirtualinherited

Reads algorithm parameters from a file storage.

Reimplemented in cv::FlannBasedMatcher, cv::DescriptorMatcher, and cv::Feature2D.

◆ read() [2/2]

template<typename _Tp >
static Ptr<_Tp> cv::Algorithm::read ( const FileNode fn)
inlinestaticinherited

Reads algorithm from the file node.

This is static template method of Algorithm. It's usage is following (in the case of SVM):

cv::FileStorage fsRead("example.xml", FileStorage::READ);
Ptr<SVM> svm = Algorithm::read<SVM>(fsRead.root());

In order to make this method work, the derived class must overwrite Algorithm::read(const FileNode& fn) and also have static create() method without parameters (or with all the optional parameters)

◆ save()

virtual void cv::Algorithm::save ( const String filename) const
virtualinherited

Saves the algorithm to a file.

In order to make this method work, the derived class must implement Algorithm::write(FileStorage& fs).

◆ setContrastWeight()

virtual void cv::MergeMertens::setContrastWeight ( float  contrast_weiht)
pure virtual

◆ setExposureWeight()

virtual void cv::MergeMertens::setExposureWeight ( float  exposure_weight)
pure virtual

◆ setSaturationWeight()

virtual void cv::MergeMertens::setSaturationWeight ( float  saturation_weight)
pure virtual

◆ write() [1/2]

virtual void cv::Algorithm::write ( FileStorage fs) const
inlinevirtualinherited

Stores algorithm parameters in a file storage.

Reimplemented in cv::FlannBasedMatcher, cv::DescriptorMatcher, and cv::Feature2D.

References CV_WRAP.

Referenced by cv::Feature2D::write(), and cv::DescriptorMatcher::write().

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◆ write() [2/2]

void cv::Algorithm::write ( const Ptr< FileStorage > &  fs,
const String name = String() 
) const
inherited

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.

◆ writeFormat()

void cv::Algorithm::writeFormat ( FileStorage fs) const
protectedinherited

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