Mat class
Constructors
- Mat.create({int rows = 0, int cols = 0, int r = 0, int g = 0, int b = 0, MatType? type})
-
factory
- Mat.empty()
-
factory
- Mat.eye(int rows, int cols, MatType type)
-
Returns an identity matrix of the specified size and type.
factory
-
Mat.from2DList(Iterable<
Iterable< data, MatType type)num> > -
Create a Mat from a 2D list
factory
-
Mat.from3DList(Iterable<
Iterable< data, MatType type)Iterable< >num> > -
Create a Mat from a 3D list
factory
-
Mat.fromList(int rows, int cols, MatType type, List<
num> data) -
Create a Mat from a list of data
factory
- Mat.fromMat(Mat mat, {bool copy = false, Rect? roi})
-
factory
- Mat.fromPointer(MatPtr mat, [bool attach = true])
-
This method is different from Mat.fromPtr, will construct from pointer directly
factory
- Mat.fromPtr(Mat m, int rows, int cols, int type, int prows, int pcols)
-
this constructor is a wrapper of
Mat (int rows, int cols, int type, void *data, size_t step=AUTO_STEP)factory - Mat.fromRange(Mat mat, int rowStart, int rowEnd, {int colStart = 0, int? colEnd})
-
Create Mat from another Mat with range
factory
- Mat.fromScalar(int rows, int cols, MatType type, Scalar s)
-
rowsNumber of rows in a 2D array.factory -
Mat.fromVec(Vec<
Struct, dynamic> vec, {int? rows, int? cols, MatType? type}) -
Create Mat from a vector Vec
factory
- Mat.ones(int rows, int cols, MatType type)
-
Returns an array of all 1's of the specified size and type.
factory
- Mat.randn(int rows, int cols, MatType type, {Scalar? mean, Scalar? std})
-
factory
- Mat.randu(int rows, int cols, MatType type, {Scalar? low, Scalar? high})
-
factory
- Mat.zeros(int rows, int cols, MatType type)
-
Returns a zero array of the specified size and type.
factory
Properties
- channels → int
-
no setter
- cols → int
-
no setter
- countNoneZero → int
-
only for channels == 1
no setter
- data → Uint8List
-
Get a view of native data, and will be GCed when the Mat is GCed.
no setter
-
dataPtr
→ Pointer<
U8> -
Get the data pointer of the Mat
no setter
- dims → int
-
no setter
- elemSize → int
-
Returns the matrix element size in bytes.
no setter
- elemSize1 → int
-
Returns the size of each matrix element channel in bytes.
no setter
- flags → int
-
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- height → int
-
no setter
- isContinus → bool
-
no setter
- isEmpty → bool
-
no setter
- isSubmatrix → bool
-
no setter
-
props
→ List<
Object?> -
no setterinherited
-
ptr
↔ Pointer<
Mat> -
getter/setter pairinherited
- ref → Mat
-
no setteroverride
- rows → int
-
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
shape
→ List<
int> -
(rows, cols, channels)
no setter
- size → VecI32
-
Mat.size
no setter
- step → (int, int, int)
-
no setter
- total → int
-
no setter
- type → MatType
-
no setter
- width → int
-
no setter
Methods
-
add<
T> (T val, {bool inplace = false}) → Mat - add
-
addF32(
double val, {bool inplace = false}) → Mat -
addF64(
double val, {bool inplace = false}) → Mat -
addI16(
int val, {bool inplace = false}) → Mat -
addI32(
int val, {bool inplace = false}) → Mat -
addI8(
int val, {bool inplace = false}) → Mat -
addMat(
Mat other, {bool inplace = false}) → Mat -
addU16(
int val, {bool inplace = false}) → Mat -
addU8(
int val, {bool inplace = false}) → Mat -
adjustROI(
int dtop, int dbottom, int dleft, int dright) → Mat - Adjusts a submatrix size and position within the parent matrix.
-
at<
T> (int i0, int i1, [int? i2]) → T - cv::Mat::at<T>(i0, i1, i2) of cv::Mat
-
atNum(
int i0, int i1, [int? i2]) → num - wrapper of cv::Mat::at()
-
atPixel(
int row, int col) → List< num> -
Get pixel value via
row,col, returns a view of native data -
atVec<
T> (int row, int col) → T -
clone(
) → Mat -
col(
int x) → Mat - Creates a matrix header for the specified matrix column.
-
colRange(
int start, int end) → Mat - Creates a matrix header for the specified column span.
-
convertTo(
MatType type, {bool inplace = false, double alpha = 1, double beta = 0}) → Mat - Converts an array to another data type with optional scaling.
-
convertToFp16(
) → Mat -
copyTo(
Mat dst, {Mat? mask}) → void - Copies the matrix to another one.
-
copyToWithMask(
Mat dst, Mat mask) → void -
dispose(
) → void -
divide<
T> (T val, {bool inplace = false}) → Mat - divide
-
divideF32(
double val, {bool inplace = false}) → Mat -
divideF64(
double val, {bool inplace = false}) → Mat -
divideI16(
int val, {bool inplace = false}) → Mat -
divideI32(
int val, {bool inplace = false}) → Mat -
divideI8(
int val, {bool inplace = false}) → Mat -
divideMat(
Mat other, {bool inplace = false}) → Mat -
divideU16(
int val, {bool inplace = false}) → Mat -
divideU8(
int val, {bool inplace = false}) → Mat -
forEachPixel(
void callback(int row, int col, List< num> pixel)) → void - Iterate over all pixels in the Mat.
-
forEachRow(
void callback(int row, List< num> values)) → void - Iterate over all rows in the Mat.
-
isSubtype<
S, T> () → bool -
locateROI(
) → (Size, Point) - Locates the matrix header within a parent matrix.
-
mean(
{Mat? mask}) → Scalar -
mul(
Mat other, {bool inplace = false, double scale = 1.0}) → Mat - Performs an element-wise multiplication or division of the two matrices.
-
multiply<
T> (T val, {bool inplace = false}) → Mat - Multiply
-
multiplyF32(
double val, {bool inplace = false}) → Mat -
multiplyF64(
double val, {bool inplace = false}) → Mat -
multiplyI16(
int val, {bool inplace = false}) → Mat -
multiplyI32(
int val, {bool inplace = false}) → Mat -
multiplyI8(
int val, {bool inplace = false}) → Mat -
multiplyMat(
Mat other, {bool inplace = false}) → Mat - Matrix multiplication
-
multiplyU16(
int val, {bool inplace = false}) → Mat -
multiplyU8(
int val, {bool inplace = false}) → Mat -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
patchNaNs(
{double val = 0}) → void - PatchNaNs converts NaN's to zeros.
-
ptrAt<
T extends NativeType> (int i0, [int? i1, int? i2]) → Pointer< T> - equivalent to Mat::ptr<T>(i0, i1, i2)
-
ptrAtF16(
int i0, [int? i1, int? i2]) → Float16P -
region(
Rect rect) → Mat - https://docs.opencv.org/4.x/d3/d63/classcv_1_1Mat.html#aa7ec97373406215f2d4bc72cc1d27036
-
release(
) → void -
reshape(
int cn, [int rows = 0]) → Mat - Changes the shape and/or the number of channels of a 2D matrix without copying the data.
-
reshapeTo(
int cn, List< int> newshape) → Mat - https://docs.opencv.org/4.x/d3/d63/classcv_1_1Mat.html#ab2e41a510891e548f744832cf9b8ab89
-
rotate(
int rotationCode, {bool inplace = false}) → Mat -
row(
int y) → Mat - Creates a matrix header for the specified matrix row.
-
rowRange(
int start, int end) → Mat - Creates a matrix header for the specified row span.
-
set<
T> (int i0, int i1, T val, [int? i2]) → void - equivalent to Mat::at<T>(i0, i1, i2) = val; where T might be int, double, or cv::Vec<> like cv::Vec3b
-
setNum(
int i0, int i1, num val, [int? i2]) → void -
setTo(
Scalar value, {Mat? mask}) → Mat - Sets all or some of the array elements to the specified value.
-
setVec<
T extends CvVec< (Struct> >int row, int col, T val) → void -
sqrt(
) → Mat - Calculates a square root of array elements.
-
stdDev(
) → Scalar - Calculates standard deviation, per channel.
-
subtract<
T> (T val, {bool inplace = false}) → Mat - subtract
-
subtractF32(
double val, {bool inplace = false}) → Mat -
subtractF64(
double val, {bool inplace = false}) → Mat -
subtractI16(
int val, {bool inplace = false}) → Mat -
subtractI32(
int val, {bool inplace = false}) → Mat -
subtractI8(
int val, {bool inplace = false}) → Mat -
subtractMat(
Mat other, {bool inplace = false}) → Mat -
subtractU16(
int val, {bool inplace = false}) → Mat -
subtractU8(
int val, {bool inplace = false}) → Mat -
sum(
) → Scalar - Sum calculates the per-channel pixel sum of an image.
-
t(
) → Mat - Transposes a matrix.
-
toFmtString(
{int fmtType = FMT_NUMPY, int f16Precision = 4, int f32Precision = 8, int f64Precision = 16, bool multiLine = true}) → String -
toList(
) → List< List< num> > - This Method converts single-channel Mat to 2D List
-
toList3D(
) → List< List< List< >num> > - Returns a 3D list of the mat, only for multi-channel mats. The list is ordered as colchannels.
-
toString(
) → String -
A string representation of this object.
override
-
transpose(
{bool inplace = false}) → Mat -
variance(
) → Scalar - Similar to stdDev
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Properties
- finalizer → NativeFinalizer
-
final
Constants
- FMT_C → const int
- FMT_CSV → const int
- FMT_DEFAULT → const int
- FMT_MATLAB → const int
- FMT_NUMPY → const int
- FMT_PYTHON → const int