Template matrix class derived from Mat. More...

#include <opencv2/core/mat.hpp>

Collaboration diagram for cv::Mat_< _Tp >:

Public Types
typedef DataType< _Tp >::channel_type	channel_type

typedef MatConstIterator_< _Tp >	const_iterator

typedef MatIterator_< _Tp >	iterator

typedef _Tp	value_type

Public Types inherited from cv::Mat
enum	{ MAGIC_VAL = 0x42FF0000 , AUTO_STEP = 0 , CONTINUOUS_FLAG = CV_MAT_CONT_FLAG , SUBMATRIX_FLAG = CV_SUBMAT_FLAG }

enum	{ MAGIC_MASK = 0xFFFF0000 , TYPE_MASK = 0x00000FFF , DEPTH_MASK = 7 }

Public Member Functions
	Mat_ () CV_NOEXCEPT
	default constructor

	Mat_ (const Mat &m)
	copy/conversion constructor. If m is of different type, it's converted

	Mat_ (const Mat_ &m)
	copy constructor

	Mat_ (const Mat_ &m, const Range &rowRange, const Range &colRange=Range::all())
	selects a submatrix

	Mat_ (const Mat_ &m, const Range *ranges)
	selects a submatrix, n-dim version

	Mat_ (const Mat_ &m, const Rect &roi)
	selects a submatrix

	Mat_ (const Mat_ &m, const std::vector< Range > &ranges)
	selects a submatrix, n-dim version

	Mat_ (const MatCommaInitializer_< _Tp > &commaInitializer)

	Mat_ (const MatExpr &e)
	from a matrix expression

template<int m, int n>
	Mat_ (const Matx< typename DataType< _Tp >::channel_type, m, n > &mtx, bool copyData=true)

	Mat_ (const Point3_< typename DataType< _Tp >::channel_type > &pt, bool copyData=true)

	Mat_ (const Point_< typename DataType< _Tp >::channel_type > &pt, bool copyData=true)

template<std::size_t _Nm>
	Mat_ (const std::array< _Tp, _Nm > &arr, bool copyData=false)

	Mat_ (const std::initializer_list< int > sizes, const std::initializer_list< _Tp > values)

	Mat_ (const std::vector< _Tp > &vec, bool copyData=false)
	makes a matrix out of Vec, std::vector, Point_ or Point3_. The matrix will have a single column

template<int n>
	Mat_ (const Vec< typename DataType< _Tp >::channel_type, n > &vec, bool copyData=true)

	Mat_ (int _ndims, const int *_sizes)
	n-dim array constructor

	Mat_ (int _ndims, const int _sizes, _Tp _data, const size_t *_steps=0)
	constructs n-dim matrix on top of user-allocated data. steps are in bytes(!!!), regardless of the type

	Mat_ (int _ndims, const int *_sizes, const _Tp &value)
	n-dim array constructor that sets each matrix element to specified value

	Mat_ (int _rows, int _cols)
	equivalent to Mat(_rows, _cols, DataType<_Tp>::type)

	Mat_ (int _rows, int _cols, _Tp *_data, size_t _step=AUTO_STEP)
	constructs a matrix on top of user-allocated data. step is in bytes(!!!), regardless of the type

	Mat_ (int _rows, int _cols, const _Tp &value)
	constructor that sets each matrix element to specified value

	Mat_ (Mat &&m)

	Mat_ (Mat_ &&m)

	Mat_ (MatExpr &&e)

	Mat_ (Size _size)
	equivalent to Mat(_size, DataType<_Tp>::type)

	Mat_ (Size _size, const _Tp &value)
	constructor that sets each matrix element to specified value

	Mat_ (std::initializer_list< _Tp > values)

Mat_ &	adjustROI (int dtop, int dbottom, int dleft, int dright)
	some more overridden methods

iterator	begin ()
	iterators; they are smart enough to skip gaps in the end of rows

const_iterator	begin () const

int	channels () const

CV_NODISCARD_STD Mat_	clone () const

Mat_	col (int x) const

void	create (int _ndims, const int *_sizes)
	equivalent to Mat::create(_ndims, _sizes, DatType<_Tp>::type)

void	create (int _rows, int _cols)
	equivalent to Mat::create(_rows, _cols, DataType<_Tp>::type)

void	create (Size _size)
	equivalent to Mat::create(_size, DataType<_Tp>::type)

void	createSameSize (InputArray arr)
	equivalent to Mat::create(arr.ndims, arr.size.p, DatType<_Tp>::type)

Mat_	cross (const Mat_ &m) const
	cross-product

int	depth () const

Mat_	diag (int d=0) const

size_t	elemSize () const
	overridden forms of Mat::elemSize() etc.

size_t	elemSize1 () const

iterator	end ()

const_iterator	end () const

template<typename Functor >
void	forEach (const Functor &operation)
	template methods for operation over all matrix elements.

template<typename Functor >
void	forEach (const Functor &operation) const

template<typename T2 >
	operator Mat_< T2 > () const
	data type conversion

template<int m, int n>
	operator Matx< typename DataType< _Tp >::channel_type, m, n > () const
	conversion to Matx

template<std::size_t _Nm>
	operator std::array< _Tp, _Nm > () const
	conversion to array.

	operator std::vector< _Tp > () const
	conversion to vector.

template<int n>
	operator Vec< typename DataType< _Tp >::channel_type, n > () const
	conversion to Vec

_Tp &	operator() (const int *idx)
	returns reference to the specified element

const _Tp &	operator() (const int *idx) const
	returns read-only reference to the specified element

Mat_	operator() (const Range &rowRange, const Range &colRange) const

Mat_	operator() (const Range *ranges) const

Mat_	operator() (const Rect &roi) const

Mat_	operator() (const std::vector< Range > &ranges) const

template<int n>
_Tp &	operator() (const Vec< int, n > &idx)
	returns reference to the specified element

template<int n>
const _Tp &	operator() (const Vec< int, n > &idx) const
	returns read-only reference to the specified element

_Tp &	operator() (int idx0)
	returns reference to the specified element (1D case)

const _Tp &	operator() (int idx0) const
	returns read-only reference to the specified element (1D case)

_Tp &	operator() (int idx0, int idx1, int idx2)
	returns reference to the specified element (3D case)

const _Tp &	operator() (int idx0, int idx1, int idx2) const
	returns read-only reference to the specified element (3D case)

_Tp &	operator() (int row, int col)
	returns reference to the specified element (2D case)

const _Tp &	operator() (int row, int col) const
	returns read-only reference to the specified element (2D case)

_Tp &	operator() (Point pt)

const _Tp &	operator() (Point pt) const

Mat_ &	operator= (const _Tp &s)
	set all the elements to s.

Mat_ &	operator= (const Mat &m)

Mat_ &	operator= (const Mat_ &m)

Mat_ &	operator= (const MatExpr &e)
	assign a matrix expression

Mat_ &	operator= (Mat &&m)

Mat_ &	operator= (Mat_ &&m)

_Tp *	operator[] (int y)
	more convenient forms of row and element access operators

const _Tp *	operator[] (int y) const

std::reverse_iterator< iterator >	rbegin ()

std::reverse_iterator< const_iterator >	rbegin () const

void	release ()
	equivalent to Mat::release()

std::reverse_iterator< iterator >	rend ()

std::reverse_iterator< const_iterator >	rend () const

Mat_	row (int y) const
	overridden forms of Mat::row() etc.

size_t	step1 (int i=0) const

size_t	stepT (int i=0) const
	returns step()/sizeof(_Tp)

int	type () const

Public Member Functions inherited from cv::Mat
	Mat () CV_NOEXCEPT

	Mat (const cuda::GpuMat &m)
	download data from GpuMat

	Mat (const Mat &m)

	Mat (const Mat &m, const Range &rowRange, const Range &colRange=Range::all())

	Mat (const Mat &m, const Range *ranges)

	Mat (const Mat &m, const Rect &roi)

	Mat (const Mat &m, const std::vector< Range > &ranges)

template<typename _Tp >
	Mat (const MatCommaInitializer_< _Tp > &commaInitializer)

	Mat (const MatShape &shape, int type)

	Mat (const MatShape &shape, int type, const Scalar &s)

	Mat (const MatShape &shape, int type, void data, const size_t steps=0)

template<typename _Tp , int m, int n>
	Mat (const Matx< _Tp, m, n > &mtx, bool copyData=true)

template<typename _Tp >
	Mat (const Point3_< _Tp > &pt, bool copyData=true)

template<typename _Tp >
	Mat (const Point_< _Tp > &pt, bool copyData=true)

template<typename _Tp , size_t _Nm>
	Mat (const std::array< _Tp, _Nm > &arr, bool copyData=false)

template<typename _Tp , typename = typename std::enable_if<std::is_arithmetic<_Tp>::value>::type>
	Mat (const std::initializer_list< _Tp > list)

template<typename _Tp >
	Mat (const std::initializer_list< int > sizes, const std::initializer_list< _Tp > list)

template<typename _Tp >
	Mat (const std::vector< _Tp > &vec, bool copyData=false)

	Mat (const std::vector< int > &sizes, int type)

	Mat (const std::vector< int > &sizes, int type, const Scalar &s)

	Mat (const std::vector< int > &sizes, int type, void data, const size_t steps=0)

template<typename _Tp , int n>
	Mat (const Vec< _Tp, n > &vec, bool copyData=true)

	Mat (int ndims, const int *sizes, int type)

	Mat (int ndims, const int *sizes, int type, const Scalar &s)

	Mat (int ndims, const int sizes, int type, void data, const size_t *steps=0)

	Mat (int rows, int cols, int type)

	Mat (int rows, int cols, int type, const Scalar &s)

	Mat (int rows, int cols, int type, void *data, size_t step=AUTO_STEP)

	Mat (Mat &&m) CV_NOEXCEPT

	Mat (Size size, int type)

	Mat (Size size, int type, const Scalar &s)

	Mat (Size size, int type, void *data, size_t step=AUTO_STEP)

	Mat (std::initializer_list< int > shape, int type)

	Mat (std::initializer_list< int > shape, int type, const Scalar &s)

	Mat (std::initializer_list< int > shape, int type, void data, const size_t steps=0)

	~Mat ()
	destructor - calls release()

void	addref ()
	Increments the reference counter.

Mat &	adjustROI (int dtop, int dbottom, int dleft, int dright)
	Adjusts a submatrix size and position within the parent matrix.

void	assignTo (Mat &m, int type=-1) const
	Provides a functional form of convertTo.

template<typename _Tp >
_Tp &	at (const int *idx)

template<typename _Tp >
const _Tp &	at (const int *idx) const

template<typename _Tp , int n>
_Tp &	at (const Vec< int, n > &idx)

template<typename _Tp , int n>
const _Tp &	at (const Vec< int, n > &idx) const

template<typename _Tp >
_Tp &	at (int i0, int i1, int i2)

template<typename _Tp >
const _Tp &	at (int i0, int i1, int i2) const

template<typename _Tp >
_Tp &	at (int i0=0)
	Returns a reference to the specified array element.

template<typename _Tp >
const _Tp &	at (int i0=0) const

template<typename _Tp >
_Tp &	at (int row, int col)

template<typename _Tp >
const _Tp &	at (int row, int col) const

template<typename _Tp >
_Tp &	at (Point pt)

template<typename _Tp >
const _Tp &	at (Point pt) const

template<typename _Tp >
MatIterator_< _Tp >	begin ()
	Returns the matrix iterator and sets it to the first matrix element.

template<typename _Tp >
MatConstIterator_< _Tp >	begin () const

int	channels () const
	Returns the number of matrix channels.

int	checkVector (int elemChannels, int depth=-1, bool requireContinuous=true) const

CV_NODISCARD_STD Mat	clone () const
	Creates a full copy of the array and the underlying data.

Mat	col (int x) const
	Creates a matrix header for the specified matrix column.

Mat	colRange (const Range &r) const

Mat	colRange (int startcol, int endcol) const
	Creates a matrix header for the specified column span.

void	convertTo (OutputArray m, int rtype, double alpha=1, double beta=0) const
	Converts an array to another data type with optional scaling.

void	copySize (const Mat &m)
	internal use function; properly re-allocates _size, _step arrays

void	copyTo (OutputArray m) const
	Copies the matrix to another one.

void	copyTo (OutputArray m, InputArray mask) const

void	create (const MatShape &shape, int type)

void	create (const std::vector< int > &sizes, int type)

void	create (int ndims, const int *sizes, int type)

void	create (int rows, int cols, int type)
	Allocates new array data if needed.

void	create (Size size, int type)

void	create (std::initializer_list< int > shape, int type)

void	createSameSize (InputArray arr, int type)
	Creates the matrix of the same size as another array.

Mat	cross (InputArray m) const
	Computes a cross-product of two 3-element vectors.

void	deallocate ()
	internal use function, consider to use 'release' method instead; deallocates the matrix data

int	depth () const
	Returns the depth of a matrix element.

Mat	diag (int d=0) const
	Extracts a diagonal from a matrix.

double	dot (InputArray m) const
	Computes a dot-product of two vectors.

size_t	elemSize () const
	Returns the matrix element size in bytes.

size_t	elemSize1 () const
	Returns the size of each matrix element channel in bytes.

bool	empty () const
	Returns true if the array has no elements.

template<typename _Tp >
MatIterator_< _Tp >	end ()
	Returns the matrix iterator and sets it to the after-last matrix element.

template<typename _Tp >
MatConstIterator_< _Tp >	end () const

void	fit (const MatShape &shape, int type)

void	fit (const std::vector< int > &sizes, int type)

void	fit (int ndims, const int *sizes, int type)

void	fit (int rows, int cols, int type)
	Similar to create(rows, cols, type), but only reallocates memory if the existing buffer size is not enough.

void	fit (Size size, int type)

void	fit (std::initializer_list< int > shape, int type)

void	fitSameSize (InputArray arr, int type)
	Similar to createSameSize(arr, type), but only reallocates memory if the existing buffer is not enough.

template<typename _Tp , typename Functor >
void	forEach (const Functor &operation)
	Runs the given functor over all matrix elements in parallel.

template<typename _Tp , typename Functor >
void	forEach (const Functor &operation) const

UMat	getUMat (AccessFlag accessFlags, UMatUsageFlags usageFlags=USAGE_DEFAULT) const
	retrieve UMat from Mat

MatExpr	inv (int method=DECOMP_LU) const
	Inverses a matrix.

bool	isContinuous () const
	Reports whether the matrix is continuous or not.

bool	isSubmatrix () const
	returns true if the matrix is a submatrix of another matrix

void	locateROI (Size &wholeSize, Point &ofs) const
	Locates the matrix header within a parent matrix.

MatExpr	mul (InputArray m, double scale=1) const
	Performs an element-wise multiplication or division of the two matrices.

template<typename _Tp , int m, int n>
	operator Matx< _Tp, m, n > () const

template<typename _Tp , std::size_t _Nm>
	operator std::array< _Tp, _Nm > () const

template<typename _Tp >
	operator std::vector< _Tp > () const

template<typename _Tp , int n>
	operator Vec< _Tp, n > () const

Mat	operator() (const Range *ranges) const

Mat	operator() (const Rect &roi) const

Mat	operator() (const std::vector< Range > &ranges) const

Mat	operator() (Range rowRange, Range colRange) const
	Extracts a rectangular submatrix.

Mat &	operator= (const Mat &m)
	assignment operators

Mat &	operator= (const MatExpr &expr)

Mat &	operator= (const Scalar &s)
	Sets all or some of the array elements to the specified value.

Mat &	operator= (Mat &&m)

void	pop_back (size_t nelems=1)
	Removes elements from the bottom of the matrix.

uchar *	ptr (const int *idx)

template<typename _Tp >
_Tp *	ptr (const int *idx)

const uchar *	ptr (const int *idx) const

template<typename _Tp >
const _Tp *	ptr (const int *idx) const

template<int n>
uchar *	ptr (const Vec< int, n > &idx)

template<typename _Tp , int n>
_Tp *	ptr (const Vec< int, n > &idx)

template<int n>
const uchar *	ptr (const Vec< int, n > &idx) const

template<typename _Tp , int n>
const _Tp *	ptr (const Vec< int, n > &idx) const

uchar *	ptr (int i0, int i1, int i2)

template<typename _Tp >
_Tp *	ptr (int i0, int i1, int i2)

const uchar *	ptr (int i0, int i1, int i2) const

template<typename _Tp >
const _Tp *	ptr (int i0, int i1, int i2) const

uchar *	ptr (int i0=0)
	Returns a pointer to the specified matrix row.

template<typename _Tp >
_Tp *	ptr (int i0=0)

const uchar *	ptr (int i0=0) const

template<typename _Tp >
const _Tp *	ptr (int i0=0) const

uchar *	ptr (int row, int col)

template<typename _Tp >
_Tp *	ptr (int row, int col)

const uchar *	ptr (int row, int col) const

template<typename _Tp >
const _Tp *	ptr (int row, int col) const

template<typename _Tp >
void	push_back (const _Tp &elem)
	Adds elements to the bottom of the matrix.

void	push_back (const Mat &m)

template<typename _Tp >
void	push_back (const Mat_< _Tp > &elem)

template<typename _Tp >
void	push_back (const std::vector< _Tp > &elem)

void	push_back_ (const void *elem)
	internal function

template<typename _Tp >
std::reverse_iterator< MatIterator_< _Tp > >	rbegin ()
	Same as begin() but for inverse traversal.

template<typename _Tp >
std::reverse_iterator< MatConstIterator_< _Tp > >	rbegin () const

void	release ()
	Decrements the reference counter and deallocates the matrix if needed.

template<typename _Tp >
std::reverse_iterator< MatIterator_< _Tp > >	rend ()
	Same as end() but for inverse traversal.

template<typename _Tp >
std::reverse_iterator< MatConstIterator_< _Tp > >	rend () const

void	reserve (size_t sz)
	Reserves space for the certain number of rows.

void	reserveBuffer (size_t sz)
	Reserves space for the certain number of bytes.

Mat	reshape (int cn, const MatShape &newshape) const

Mat	reshape (int cn, const std::vector< int > &newshape) const

Mat	reshape (int cn, int newndims, const int *newsz) const

Mat	reshape (int cn, int rows=0) const
	Changes the shape and/or the number of channels of a 2D matrix without copying the data.

Mat	reshape (int cn, std::initializer_list< int > newshape) const

void	resize (size_t sz)
	Changes the number of matrix rows.

void	resize (size_t sz, const Scalar &s)

Mat	row (int y) const
	Creates a matrix header for the specified matrix row.

Mat	rowRange (const Range &r) const

Mat	rowRange (int startrow, int endrow) const
	Creates a matrix header for the specified row span.

Mat &	setTo (InputArray value, InputArray mask=noArray())
	Sets all or some of the array elements to the specified value.

Mat &	setZero ()
	Sets all the array elements to 0.

MatShape	shape () const
	Returns the shape.

size_t	step1 (int i=0) const
	Returns a normalized step.

MatExpr	t () const
	Transposes a matrix.

size_t	total () const
	Returns the total number of array elements.

size_t	total (int startDim, int endDim=INT_MAX) const
	Returns the total number of array elements.

int	type () const
	Returns the type of a matrix element.

void	updateContinuityFlag ()
	internal use method: updates the continuity flag

Static Public Member Functions
static CV_NODISCARD_STD MatExpr	eye (int rows, int cols)

static CV_NODISCARD_STD MatExpr	eye (Size size)

static CV_NODISCARD_STD MatExpr	ones (int _ndims, const int *_sizes)

static CV_NODISCARD_STD MatExpr	ones (int rows, int cols)

static CV_NODISCARD_STD MatExpr	ones (Size size)

static CV_NODISCARD_STD MatExpr	zeros (int _ndims, const int *_sizes)

static CV_NODISCARD_STD MatExpr	zeros (int rows, int cols)
	overridden forms of Mat::zeros() etc. Data type is omitted, of course

static CV_NODISCARD_STD MatExpr	zeros (Size size)

Static Public Member Functions inherited from cv::Mat
static CV_NODISCARD_STD Mat	diag (const Mat &d)
	creates a diagonal matrix

static CV_NODISCARD_STD MatExpr	eye (int rows, int cols, int type)
	Returns an identity matrix of the specified size and type.

static CV_NODISCARD_STD MatExpr	eye (Size size, int type)

static MatAllocator *	getDefaultAllocator ()

static MatAllocator *	getStdAllocator ()
	and the standard allocator

static CV_NODISCARD_STD MatExpr	ones (int ndims, const int *sz, int type)

static CV_NODISCARD_STD MatExpr	ones (int rows, int cols, int type)
	Returns an array of all 1's of the specified size and type.

static CV_NODISCARD_STD MatExpr	ones (Size size, int type)

static void	setDefaultAllocator (MatAllocator *allocator)

static CV_NODISCARD_STD MatExpr	zeros (int ndims, const int *sz, int type)

static CV_NODISCARD_STD MatExpr	zeros (int rows, int cols, int type)
	Returns a zero array of the specified size and type.

static CV_NODISCARD_STD MatExpr	zeros (Size size, int type)

Additional Inherited Members
Public Attributes inherited from cv::Mat
MatAllocator *	allocator
	custom allocator

int	cols

uchar *	data
	pointer to the data

const uchar *	dataend

const uchar *	datalimit

const uchar *	datastart
	helper fields used in locateROI and adjustROI

int	dims
	the matrix dimensionality, >= 2

int	dummy = 153

int	flags

int	rows
	the number of rows and columns or (-1, -1) when the matrix has more than 2 dimensions

MatSize	size

MatStep	step

UMatData *	u
	interaction with UMat

Protected Member Functions inherited from cv::Mat
template<typename _Tp , typename Functor >
void	forEach_impl (const Functor &operation)

Detailed Description

template<typename _Tp>
class cv::Mat_< _Tp >

Template matrix class derived from Mat.

template<typename _Tp> class Mat_ : public Mat
{
public:
    // ... some specific methods
    //         and
    // no new extra fields
};

The class Mat_<_Tp> is a thin template wrapper on top of the Mat class. It does not have any extra data fields. Nor this class nor Mat has any virtual methods. Thus, references or pointers to these two classes can be freely but carefully converted one to another. For example:

// create a 100x100 8-bit matrix
Mat M(100,100,CV_8U);
// this will be compiled fine. no any data conversion will be done.
Mat_<float>& M1 = (Mat_<float>&)M;
// the program is likely to crash at the statement below
M1(99,99) = 1.f;

While Mat is sufficient in most cases, Mat_ can be more convenient if you use a lot of element access operations and if you know matrix type at the compilation time. Note that Mat::at(int y,int x) and Mat_::operator()(int y,int x) do absolutely the same and run at the same speed, but the latter is certainly shorter:

Mat_<double> M(20,20);
for(int i = 0; i < M.rows; i++)
    for(int j = 0; j < M.cols; j++)
        M(i,j) = 1./(i+j+1);
Mat E, V;
eigen(M,E,V);
cout << E.at<double>(0,0)/E.at<double>(M.rows-1,0);

To use Mat_ for multi-channel images/matrices, pass Vec as a Mat_ parameter:

// allocate a 320x240 color image and fill it with green (in RGB space)
Mat_<Vec3b> img(240, 320, Vec3b(0,255,0));
// now draw a diagonal white line
for(int i = 0; i < 100; i++)
    img(i,i)=Vec3b(255,255,255);
// and now scramble the 2nd (red) channel of each pixel
for(int i = 0; i < img.rows; i++)
    for(int j = 0; j < img.cols; j++)
        img(i,j)[2] ^= (uchar)(i ^ j);

Mat_ is fully compatible with C++11 range-based for loop. For example such loop can be used to safely apply look-up table:

void applyTable(Mat_<uchar>& I, const uchar* const table)
{
    for(auto& pixel : I)
    {
        pixel = table[pixel];
    }
}

Examples: samples/cpp/image_alignment.cpp, samples/cpp/snippets/kalman.cpp, samples/cpp/stitching_detailed.cpp, samples/cpp/tutorial_code/core/file_input_output/file_input_output.cpp, samples/cpp/tutorial_code/core/how_to_scan_images/how_to_scan_images.cpp, samples/cpp/tutorial_code/features/Homography/decompose_homography.cpp, samples/cpp/tutorial_code/features/Homography/homography_from_camera_displacement.cpp, samples/cpp/tutorial_code/features/Homography/pose_from_homography.cpp, and samples/dnn/object_detection.cpp.

Member Typedef Documentation

◆ channel_type

template<typename _Tp >

typedef DataType<_Tp>::channel_type cv::Mat_< _Tp >::channel_type

◆ const_iterator

template<typename _Tp >

typedef MatConstIterator_<_Tp> cv::Mat_< _Tp >::const_iterator

◆ iterator

template<typename _Tp >

typedef MatIterator_<_Tp> cv::Mat_< _Tp >::iterator

◆ value_type

template<typename _Tp >

typedef _Tp cv::Mat_< _Tp >::value_type

Constructor & Destructor Documentation

◆ Mat_() [1/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( )

default constructor

◆ Mat_() [2/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	int	_rows,
		int	_cols
	)

equivalent to Mat(_rows, _cols, DataType<_Tp>::type)

◆ Mat_() [3/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	int	_rows,
		int	_cols,
		const _Tp &	value
	)

constructor that sets each matrix element to specified value

◆ Mat_() [4/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( Size _size )

explicit

equivalent to Mat(_size, DataType<_Tp>::type)

◆ Mat_() [5/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	Size	_size,
		const _Tp &	value
	)

constructor that sets each matrix element to specified value

◆ Mat_() [6/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	int	_ndims,
		const int *	_sizes
	)

n-dim array constructor

◆ Mat_() [7/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	int	_ndims,
		const int *	_sizes,
		const _Tp &	value
	)

n-dim array constructor that sets each matrix element to specified value

◆ Mat_() [8/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( const Mat & m )

copy/conversion constructor. If m is of different type, it's converted

◆ Mat_() [9/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( const Mat_< _Tp > & m )

copy constructor

◆ Mat_() [10/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	int	_rows,
		int	_cols,
		_Tp *	_data,
		size_t	_step = `AUTO_STEP`
	)

constructs a matrix on top of user-allocated data. step is in bytes(!!!), regardless of the type

◆ Mat_() [11/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	int	_ndims,
		const int *	_sizes,
		_Tp *	_data,
		const size_t *	_steps = `0`
	)

constructs n-dim matrix on top of user-allocated data. steps are in bytes(!!!), regardless of the type

◆ Mat_() [12/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	const Mat_< _Tp > &	m,
		const Range &	rowRange,
		const Range &	colRange = `Range::all()`
	)

selects a submatrix

◆ Mat_() [13/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	const Mat_< _Tp > &	m,
		const Rect &	roi
	)

selects a submatrix

◆ Mat_() [14/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	const Mat_< _Tp > &	m,
		const Range *	ranges
	)

selects a submatrix, n-dim version

◆ Mat_() [15/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	const Mat_< _Tp > &	m,
		const std::vector< Range > &	ranges
	)

selects a submatrix, n-dim version

◆ Mat_() [16/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( const MatExpr & e )

explicit

from a matrix expression

◆ Mat_() [17/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	const std::vector< _Tp > &	vec,
		bool	copyData = `false`
	)

explicit

makes a matrix out of Vec, std::vector, Point_ or Point3_. The matrix will have a single column

◆ Mat_() [18/28]

template<typename _Tp >

template<int n>

cv::Mat_< _Tp >::Mat_	(	const Vec< typename DataType< _Tp >::channel_type, n > &	vec,
		bool	copyData = `true`
	)

explicit

◆ Mat_() [19/28]

template<typename _Tp >

template<int m, int n>

cv::Mat_< _Tp >::Mat_	(	const Matx< typename DataType< _Tp >::channel_type, m, n > &	mtx,
		bool	copyData = `true`
	)

explicit

◆ Mat_() [20/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	const Point_< typename DataType< _Tp >::channel_type > &	pt,
		bool	copyData = `true`
	)

explicit

◆ Mat_() [21/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	const Point3_< typename DataType< _Tp >::channel_type > &	pt,
		bool	copyData = `true`
	)

explicit

◆ Mat_() [22/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( const MatCommaInitializer_< _Tp > & commaInitializer )

explicit

◆ Mat_() [23/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( std::initializer_list< _Tp > values )

◆ Mat_() [24/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_	(	const std::initializer_list< int >	sizes,
		const std::initializer_list< _Tp >	values
	)

explicit

◆ Mat_() [25/28]

template<typename _Tp >

template<std::size_t _Nm>

cv::Mat_< _Tp >::Mat_	(	const std::array< _Tp, _Nm > &	arr,
		bool	copyData = `false`
	)

explicit

◆ Mat_() [26/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( Mat_< _Tp > && m )

◆ Mat_() [27/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( Mat && m )

◆ Mat_() [28/28]

template<typename _Tp >

cv::Mat_< _Tp >::Mat_ ( MatExpr && e )

Member Function Documentation

◆ adjustROI()

template<typename _Tp >

Mat_ & cv::Mat_< _Tp >::adjustROI	(	int	dtop,
		int	dbottom,
		int	dleft,
		int	dright
	)

some more overridden methods

◆ begin() [1/2]

template<typename _Tp >

iterator cv::Mat_< _Tp >::begin ( )

iterators; they are smart enough to skip gaps in the end of rows

◆ begin() [2/2]

template<typename _Tp >

const_iterator cv::Mat_< _Tp >::begin ( ) const

◆ channels()

template<typename _Tp >

int cv::Mat_< _Tp >::channels ( ) const

◆ clone()

template<typename _Tp >

CV_NODISCARD_STD Mat_ cv::Mat_< _Tp >::clone ( ) const

◆ col()

template<typename _Tp >

Mat_ cv::Mat_< _Tp >::col ( int x ) const

◆ create() [1/3]

template<typename _Tp >

void cv::Mat_< _Tp >::create	(	int	_ndims,
		const int *	_sizes
	)

equivalent to Mat::create(_ndims, _sizes, DatType<_Tp>::type)

◆ create() [2/3]

template<typename _Tp >

void cv::Mat_< _Tp >::create	(	int	_rows,
		int	_cols
	)

equivalent to Mat::create(_rows, _cols, DataType<_Tp>::type)

◆ create() [3/3]

template<typename _Tp >

void cv::Mat_< _Tp >::create ( Size _size )

equivalent to Mat::create(_size, DataType<_Tp>::type)

◆ createSameSize()

template<typename _Tp >

void cv::Mat_< _Tp >::createSameSize ( InputArray arr )

equivalent to Mat::create(arr.ndims, arr.size.p, DatType<_Tp>::type)

◆ cross()

template<typename _Tp >

Mat_ cv::Mat_< _Tp >::cross ( const Mat_< _Tp > & m ) const

cross-product

◆ depth()

template<typename _Tp >

int cv::Mat_< _Tp >::depth ( ) const

◆ diag()

template<typename _Tp >

Mat_ cv::Mat_< _Tp >::diag ( int d = 0 ) const

◆ elemSize()

template<typename _Tp >

size_t cv::Mat_< _Tp >::elemSize ( ) const

overridden forms of Mat::elemSize() etc.

◆ elemSize1()

template<typename _Tp >

size_t cv::Mat_< _Tp >::elemSize1 ( ) const

◆ end() [1/2]

template<typename _Tp >

iterator cv::Mat_< _Tp >::end ( )

◆ end() [2/2]

template<typename _Tp >

const_iterator cv::Mat_< _Tp >::end ( ) const

◆ eye() [1/2]

template<typename _Tp >

static CV_NODISCARD_STD MatExpr cv::Mat_< _Tp >::eye	(	int	rows,
		int	cols
	)

static

◆ eye() [2/2]

template<typename _Tp >

static CV_NODISCARD_STD MatExpr cv::Mat_< _Tp >::eye ( Size size )

static

◆ forEach() [1/2]

template<typename _Tp >

template<typename Functor >

void cv::Mat_< _Tp >::forEach ( const Functor & operation )

template methods for operation over all matrix elements.

◆ forEach() [2/2]

template<typename _Tp >

template<typename Functor >

void cv::Mat_< _Tp >::forEach ( const Functor & operation ) const

◆ ones() [1/3]

template<typename _Tp >

static CV_NODISCARD_STD MatExpr cv::Mat_< _Tp >::ones	(	int	_ndims,
		const int *	_sizes
	)

static

◆ ones() [2/3]

template<typename _Tp >

static CV_NODISCARD_STD MatExpr cv::Mat_< _Tp >::ones	(	int	rows,
		int	cols
	)

static

◆ ones() [3/3]

template<typename _Tp >

static CV_NODISCARD_STD MatExpr cv::Mat_< _Tp >::ones ( Size size )

static

◆ operator Mat_< T2 >()

template<typename _Tp >

template<typename T2 >

cv::Mat_< _Tp >::operator Mat_< T2 > ( ) const

data type conversion

◆ operator Matx< typename DataType< _Tp >::channel_type, m, n >()

template<typename _Tp >

template<int m, int n>

cv::Mat_< _Tp >::operator Matx< typename DataType< _Tp >::channel_type, m, n > ( ) const

conversion to Matx

◆ operator std::array< _Tp, _Nm >()

template<typename _Tp >

template<std::size_t _Nm>

cv::Mat_< _Tp >::operator std::array< _Tp, _Nm > ( ) const

conversion to array.

◆ operator std::vector< _Tp >()

template<typename _Tp >

cv::Mat_< _Tp >::operator std::vector< _Tp > ( ) const

conversion to vector.

◆ operator Vec< typename DataType< _Tp >::channel_type, n >()

template<typename _Tp >

template<int n>

cv::Mat_< _Tp >::operator Vec< typename DataType< _Tp >::channel_type, n > ( ) const

conversion to Vec

◆ operator()() [1/16]

template<typename _Tp >

_Tp & cv::Mat_< _Tp >::operator() ( const int * idx )

returns reference to the specified element

◆ operator()() [2/16]

template<typename _Tp >

const _Tp & cv::Mat_< _Tp >::operator() ( const int * idx ) const

returns read-only reference to the specified element

◆ operator()() [3/16]

template<typename _Tp >

Mat_ cv::Mat_< _Tp >::operator()	(	const Range &	rowRange,
		const Range &	colRange
	)		const

◆ operator()() [4/16]

template<typename _Tp >

Mat_ cv::Mat_< _Tp >::operator() ( const Range * ranges ) const

◆ operator()() [5/16]

template<typename _Tp >

Mat_ cv::Mat_< _Tp >::operator() ( const Rect & roi ) const

◆ operator()() [6/16]

template<typename _Tp >

Mat_ cv::Mat_< _Tp >::operator() ( const std::vector< Range > & ranges ) const

◆ operator()() [7/16]

template<typename _Tp >

template<int n>

_Tp & cv::Mat_< _Tp >::operator() ( const Vec< int, n > & idx )

returns reference to the specified element

◆ operator()() [8/16]

template<typename _Tp >

template<int n>

const _Tp & cv::Mat_< _Tp >::operator() ( const Vec< int, n > & idx ) const

returns read-only reference to the specified element

◆ operator()() [9/16]

template<typename _Tp >

_Tp & cv::Mat_< _Tp >::operator() ( int idx0 )

returns reference to the specified element (1D case)

◆ operator()() [10/16]

template<typename _Tp >

const _Tp & cv::Mat_< _Tp >::operator() ( int idx0 ) const

returns read-only reference to the specified element (1D case)

◆ operator()() [11/16]

template<typename _Tp >

_Tp & cv::Mat_< _Tp >::operator()	(	int	idx0,
		int	idx1,
		int	idx2
	)

returns reference to the specified element (3D case)

◆ operator()() [12/16]

template<typename _Tp >

const _Tp & cv::Mat_< _Tp >::operator()	(	int	idx0,
		int	idx1,
		int	idx2
	)		const

returns read-only reference to the specified element (3D case)

◆ operator()() [13/16]

template<typename _Tp >

_Tp & cv::Mat_< _Tp >::operator()	(	int	row,
		int	col
	)

returns reference to the specified element (2D case)

◆ operator()() [14/16]

template<typename _Tp >

const _Tp & cv::Mat_< _Tp >::operator()	(	int	row,
		int	col
	)		const

returns read-only reference to the specified element (2D case)

◆ operator()() [15/16]

template<typename _Tp >

_Tp & cv::Mat_< _Tp >::operator() ( Point pt )

◆ operator()() [16/16]

template<typename _Tp >

const _Tp & cv::Mat_< _Tp >::operator() ( Point pt ) const

◆ operator=() [1/6]

template<typename _Tp >

Mat_ & cv::Mat_< _Tp >::operator= ( const _Tp & s )

set all the elements to s.

◆ operator=() [2/6]

template<typename _Tp >

Mat_ & cv::Mat_< _Tp >::operator= ( const Mat & m )

◆ operator=() [3/6]

template<typename _Tp >

Mat_ & cv::Mat_< _Tp >::operator= ( const Mat_< _Tp > & m )

◆ operator=() [4/6]

template<typename _Tp >

Mat_ & cv::Mat_< _Tp >::operator= ( const MatExpr & e )

assign a matrix expression

◆ operator=() [5/6]

template<typename _Tp >

Mat_ & cv::Mat_< _Tp >::operator= ( Mat && m )

◆ operator=() [6/6]

template<typename _Tp >

Mat_ & cv::Mat_< _Tp >::operator= ( Mat_< _Tp > && m )

◆ operator[]() [1/2]

template<typename _Tp >

_Tp * cv::Mat_< _Tp >::operator[] ( int y )

more convenient forms of row and element access operators

◆ operator[]() [2/2]

template<typename _Tp >

const _Tp * cv::Mat_< _Tp >::operator[] ( int y ) const

◆ rbegin() [1/2]

template<typename _Tp >

std::reverse_iterator< iterator > cv::Mat_< _Tp >::rbegin ( )

◆ rbegin() [2/2]

template<typename _Tp >

std::reverse_iterator< const_iterator > cv::Mat_< _Tp >::rbegin ( ) const

◆ release()

template<typename _Tp >

void cv::Mat_< _Tp >::release ( )

equivalent to Mat::release()

◆ rend() [1/2]

template<typename _Tp >

std::reverse_iterator< iterator > cv::Mat_< _Tp >::rend ( )

◆ rend() [2/2]

template<typename _Tp >

std::reverse_iterator< const_iterator > cv::Mat_< _Tp >::rend ( ) const

◆ row()

template<typename _Tp >

Mat_ cv::Mat_< _Tp >::row ( int y ) const

overridden forms of Mat::row() etc.

◆ step1()

template<typename _Tp >

size_t cv::Mat_< _Tp >::step1 ( int i = 0 ) const

◆ stepT()

template<typename _Tp >

size_t cv::Mat_< _Tp >::stepT ( int i = 0 ) const

returns step()/sizeof(_Tp)

◆ type()

template<typename _Tp >

int cv::Mat_< _Tp >::type ( ) const

◆ zeros() [1/3]

template<typename _Tp >

static CV_NODISCARD_STD MatExpr cv::Mat_< _Tp >::zeros	(	int	_ndims,
		const int *	_sizes
	)

static

◆ zeros() [2/3]

template<typename _Tp >

static CV_NODISCARD_STD MatExpr cv::Mat_< _Tp >::zeros	(	int	rows,
		int	cols
	)

static

overridden forms of Mat::zeros() etc. Data type is omitted, of course

◆ zeros() [3/3]

template<typename _Tp >

static CV_NODISCARD_STD MatExpr cv::Mat_< _Tp >::zeros ( Size size )

static

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

opencv2/core/mat.hpp

Public Types

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ channel_type

◆ const_iterator

◆ iterator

◆ value_type

Constructor & Destructor Documentation

◆ Mat_() [1/28]

◆ Mat_() [2/28]

◆ Mat_() [3/28]

◆ Mat_() [4/28]

◆ Mat_() [5/28]

◆ Mat_() [6/28]

◆ Mat_() [7/28]

◆ Mat_() [8/28]

◆ Mat_() [9/28]

◆ Mat_() [10/28]

◆ Mat_() [11/28]

◆ Mat_() [12/28]

◆ Mat_() [13/28]

◆ Mat_() [14/28]

◆ Mat_() [15/28]

◆ Mat_() [16/28]

◆ Mat_() [17/28]

◆ Mat_() [18/28]

◆ Mat_() [19/28]

◆ Mat_() [20/28]

◆ Mat_() [21/28]

◆ Mat_() [22/28]

◆ Mat_() [23/28]

◆ Mat_() [24/28]

◆ Mat_() [25/28]

◆ Mat_() [26/28]

◆ Mat_() [27/28]

◆ Mat_() [28/28]

Member Function Documentation

◆ adjustROI()

◆ begin() [1/2]

◆ begin() [2/2]

◆ channels()

◆ clone()

◆ col()

◆ create() [1/3]

◆ create() [2/3]

◆ create() [3/3]

◆ createSameSize()

◆ cross()

◆ depth()

◆ diag()

◆ elemSize()

◆ elemSize1()

◆ end() [1/2]

◆ end() [2/2]

◆ eye() [1/2]

◆ eye() [2/2]

◆ forEach() [1/2]

◆ forEach() [2/2]

◆ ones() [1/3]

◆ ones() [2/3]

◆ ones() [3/3]

◆ operator Mat_< T2 >()

◆ operator Matx< typename DataType< _Tp >::channel_type, m, n >()

◆ operator std::array< _Tp, _Nm >()

◆ operator std::vector< _Tp >()

◆ operator Vec< typename DataType< _Tp >::channel_type, n >()

◆ operator()() [1/16]

◆ operator()() [2/16]

◆ operator()() [3/16]

◆ operator()() [4/16]

◆ operator()() [5/16]

◆ operator()() [6/16]

◆ operator()() [7/16]

◆ operator()() [8/16]

◆ operator()() [9/16]

◆ operator()() [10/16]

◆ operator()() [11/16]