Full reference peak signal to noise ratio (PSNR) algorithm https://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio. More...

#include <opencv2/quality/qualitypsnr.hpp>

Inheritance diagram for cv::quality::QualityPSNR:

Public Member Functions
void	clear () CV_OVERRIDE
	Implements Algorithm::clear() More...

cv::Scalar	compute (InputArrayOfArrays cmpImgs) CV_OVERRIDE
	compute the PSNR More...

bool	empty () const CV_OVERRIDE
	Implements Algorithm::empty() More...

double	getMaxPixelValue () const
	return the maximum pixel value used for PSNR computation More...

void	setMaxPixelValue (double val)
	sets the maximum pixel value used for PSNR computation More...

Public Member Functions inherited from cv::quality::QualityBase
virtual	~QualityBase ()=default
	Destructor. More...

virtual void	getQualityMaps (OutputArrayOfArrays dst) const
	Returns output quality map images that were generated during computation, if supported by the algorithm. More...

Public Member Functions inherited from cv::Algorithm
	Algorithm ()

virtual	~Algorithm ()

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 cv::Scalar	compute (InputArrayOfArrays refImgs, InputArrayOfArrays cmpImgs, OutputArrayOfArrays qualityMaps, double maxPixelValue=QualityPSNR::MAX_PIXEL_VALUE_DEFAULT)
	static method for computing quality More...

static Ptr< QualityPSNR >	create (InputArrayOfArrays refImgs, double maxPixelValue=QualityPSNR::MAX_PIXEL_VALUE_DEFAULT)
	Create an object which calculates quality via mean square error. More...

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...

Static Public Attributes
static const int	MAX_PIXEL_VALUE_DEFAULT = 255
	Default maximum pixel value. More...

Protected Member Functions
	QualityPSNR (Ptr< QualityMSE > qualityMSE, double maxPixelValue)
	Constructor. More...

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

Protected Attributes
double	_maxPixelValue = QualityPSNR::MAX_PIXEL_VALUE_DEFAULT

Ptr< QualityMSE >	_qualityMSE

Protected Attributes inherited from cv::quality::QualityBase
std::vector< _quality_map_type >	_qualityMaps
	Output quality maps if generated by algorithm. More...

Additional Inherited Members
Protected Types inherited from cv::quality::QualityBase
using	_quality_map_type = cv::UMat
	internal quality map type default More...

Detailed Description

Full reference peak signal to noise ratio (PSNR) algorithm https://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio.

Constructor & Destructor Documentation

§ QualityPSNR()

cv::quality::QualityPSNR::QualityPSNR	(	Ptr< QualityMSE >	qualityMSE,
		double	maxPixelValue
	)

inlineprotected

Constructor.

Member Function Documentation

§ clear()

void cv::quality::QualityPSNR::clear ( )

inlinevirtual

Python:
	None	=	cv.quality_QualityPSNR.clear(		)

Implements Algorithm::clear()

Reimplemented from cv::quality::QualityBase.

§ compute() [1/2]

cv::Scalar cv::quality::QualityPSNR::compute ( InputArrayOfArrays cmpImgs )

inlinevirtual


retval	=	cv.quality_QualityPSNR.compute(	cmpImgs	)
retval, qualityMaps	=	cv.quality_QualityPSNR.compute(	refImgs, cmpImgs[, qualityMaps[, maxPixelValue]]	)
retval, qualityMaps	=	cv.quality.QualityPSNR_compute(	refImgs, cmpImgs[, qualityMaps[, maxPixelValue]]	)

compute the PSNR

Parameters

cmpImgs Comparison images

Returns: Per-channel PSNR value, or std::numeric_limits<double>::infinity() if the MSE between the two images == 0 The PSNR for multi-frame images is computed by calculating the average MSE of all frames and then generating the PSNR from that value

Implements cv::quality::QualityBase.

§ compute() [2/2]

static cv::Scalar cv::quality::QualityPSNR::compute	(	InputArrayOfArrays	refImgs,
		InputArrayOfArrays	cmpImgs,
		OutputArrayOfArrays	qualityMaps,
		double	maxPixelValue = `QualityPSNR::MAX_PIXEL_VALUE_DEFAULT`
	)

inlinestatic


retval	=	cv.quality_QualityPSNR.compute(	cmpImgs	)
retval, qualityMaps	=	cv.quality_QualityPSNR.compute(	refImgs, cmpImgs[, qualityMaps[, maxPixelValue]]	)
retval, qualityMaps	=	cv.quality.QualityPSNR_compute(	refImgs, cmpImgs[, qualityMaps[, maxPixelValue]]	)

static method for computing quality

Parameters

refImgs	reference image(s)
cmpImgs	comparison image(s)
qualityMaps	output quality map(s), or cv::noArray()
maxPixelValue	maximum per-channel value for any individual pixel; eg 255 for uint8 image

Returns: PSNR value, or std::numeric_limits<double>::infinity() if the MSE between the two images == 0 The PSNR for multi-frame images is computed by calculating the average MSE of all frames and then generating the PSNR from that value

§ create()

static Ptr<QualityPSNR> cv::quality::QualityPSNR::create	(	InputArrayOfArrays	refImgs,
		double	maxPixelValue = `QualityPSNR::MAX_PIXEL_VALUE_DEFAULT`
	)

inlinestatic

Python:
	retval	=	cv.quality.QualityPSNR_create(	refImgs[, maxPixelValue]	)

Create an object which calculates quality via mean square error.

Parameters

refImgs	input image(s) to use as the source for comparison
maxPixelValue	maximum per-channel value for any individual pixel; eg 255 for uint8 image

§ empty()

bool cv::quality::QualityPSNR::empty ( ) const

inlinevirtual

Python:
	retval	=	cv.quality_QualityPSNR.empty(		)

Implements Algorithm::empty()

Reimplemented from cv::quality::QualityBase.

§ getMaxPixelValue()

double cv::quality::QualityPSNR::getMaxPixelValue ( ) const

inline

Python:
	retval	=	cv.quality_QualityPSNR.getMaxPixelValue(		)

return the maximum pixel value used for PSNR computation

§ setMaxPixelValue()

void cv::quality::QualityPSNR::setMaxPixelValue ( double val )

inline

Python:
	None	=	cv.quality_QualityPSNR.setMaxPixelValue(	val	)

sets the maximum pixel value used for PSNR computation

Parameters

val	Maximum pixel value

Member Data Documentation

§ _maxPixelValue

double cv::quality::QualityPSNR::_maxPixelValue = QualityPSNR::MAX_PIXEL_VALUE_DEFAULT

protected

§ _qualityMSE

Ptr<QualityMSE> cv::quality::QualityPSNR::_qualityMSE

protected

§ MAX_PIXEL_VALUE_DEFAULT

const int cv::quality::QualityPSNR::MAX_PIXEL_VALUE_DEFAULT = 255

static

Default maximum pixel value.

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

opencv2/quality/qualitypsnr.hpp

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

§ QualityPSNR()

Member Function Documentation

§ clear()

§ compute() [1/2]

§ compute() [2/2]

§ create()

§ empty()

§ getMaxPixelValue()

§ setMaxPixelValue()

Member Data Documentation

§ _maxPixelValue

§ _qualityMSE

§ MAX_PIXEL_VALUE_DEFAULT