Namespaces
namespace	cv::gapi

Classes
struct	cv::GArrayDesc

struct	cv::GFrameDesc

struct	cv::GMatDesc

struct	cv::GOpaqueDesc

struct	cv::GScalarDesc

Functions
GAPI_WRAP	cv::GScalar::GScalar ()
	Constructs an empty GScalar.

GAPI_WRAP	cv::GScalar::GScalar (const cv::Scalar &s)
	Constructs a value-initialized GScalar.

	cv::GScalar::GScalar (cv::Scalar &&s)
	Constructs a value-initialized GScalar.

	cv::GScalar::GScalar (double v0)
	Constructs a value-initialized GScalar.

GMatDesc	cv::descr_of (const cv::Mat &mat)

GScalarDesc	cv::descr_of (const cv::Scalar &scalar)

GMatDesc	cv::descr_of (const cv::UMat &mat)

GMatDesc	cv::descr_of (const RMat &mat)

template<typename U >
GArrayDesc	cv::descr_of (const std::vector< U > &)

template<typename U >
GOpaqueDesc	cv::descr_of (const U &)

GArrayDesc	cv::empty_array_desc ()

static GFrameDesc	cv::empty_gframe_desc ()

static GMatDesc	cv::empty_gmat_desc ()

GOpaqueDesc	cv::empty_gopaque_desc ()

GScalarDesc	cv::empty_scalar_desc ()

bool	cv::GScalarDesc::operator!= (const GScalarDesc &rhs) const

std::ostream &	cv::operator<< (std::ostream &os, const cv::GScalarDesc &desc)

bool	cv::GScalarDesc::operator== (const GScalarDesc &) const

Detailed Description

Function Documentation

◆ GScalar() [1/4]

GAPI_WRAP cv::GScalar::GScalar ( )

#include <opencv2/gapi/gscalar.hpp>

Constructs an empty GScalar.

Normally, empty G-API data objects denote a starting point of the graph. When an empty GScalar is assigned to a result of some operation, it obtains a functional link to this operation (and is not empty anymore).

◆ GScalar() [2/4]

GAPI_WRAP cv::GScalar::GScalar ( const cv::Scalar & s )

explicit

#include <opencv2/gapi/gscalar.hpp>

Constructs a value-initialized GScalar.

In contrast with GMat (which can be either an explicit graph input or a result of some operation), GScalars may have their values be associated at graph construction time. It is useful when some operation has a GScalar input which doesn't change during the program execution, and is set only once. In this case, there is no need to declare such GScalar as a graph input.

Note: The value of GScalar may be overwritten by assigning some other GScalar to the object using operator= – on the assignment, the old GScalar value is discarded.

Parameters

s	a cv::Scalar value to associate with this GScalar object.

◆ GScalar() [3/4]

cv::GScalar::GScalar ( cv::Scalar && s )

explicit

#include <opencv2/gapi/gscalar.hpp>

Constructs a value-initialized GScalar.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

s	a cv::Scalar value to associate with this GScalar object.

◆ GScalar() [4/4]

cv::GScalar::GScalar ( double v0 )

#include <opencv2/gapi/gscalar.hpp>

Constructs a value-initialized GScalar.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

v0	A `double` value to associate with this GScalar. Note that only the first component of a four-component cv::Scalar is set to this value, with others remain zeros.

This constructor overload is not marked explicit and can be used in G-API expression code like this:

cv::GMat a;

cv::GMat b = a + 1;

cv::GMat

GMat class represents image or tensor data in the graph.

Definition: gmat.hpp:67

Here operator+(GMat,GScalar) is used to wrap cv::gapi::addC() and a value-initialized GScalar is created on the fly.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.