org.bytedeco.javacpp

Class opencv_core.MatConstIterator

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.javacpp.opencv_core.MatConstIterator

Enclosing class:

opencv_core

public static class opencv_core.MatConstIterator
extends Pointer

Template matrix class derived from Mat The class Mat_ is a "thin" template wrapper on top of cv::Mat. It does not have any extra data fields, nor it or cv::Mat have any virtual methods and thus references or pointers to these two classes can be safely converted one to another. But do it with care, for example: \code // create 100x100 8-bit matrix Mat M(100,100,CV_8U); // this will compile fine. no any data conversion will be done. Mat_& M1 = (Mat_&)M; // the program will likely crash at the statement below M1(99,99) = 1.f; \endcode While cv::Mat is sufficient in most cases, cv::Mat_ can be more convenient if you use a lot of element access operations and if you know matrix type at compile time. Note that cv::Mat::at<_Tp>(int y, int x) and cv::Mat_<_Tp>::operator ()(int y, int x) do absolutely the same thing and run at the same speed, but the latter is certainly shorter: \code Mat_ 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(0,0)/E.at(M.rows-1,0); \endcode It is easy to use Mat_ for multi-channel images/matrices - just pass cv::Vec as cv::Mat_ template parameter: \code // allocate 320x240 color image and fill it with green (in RGB space) Mat_ 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 modify 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); // img(y,x)[c] accesses c-th channel of the pixel (x,y) \endcode

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.javacpp.Pointer

Pointer.CustomDeallocator, Pointer.Deallocator, Pointer.NativeDeallocator

Field Summary

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

Constructor and Description
opencv_core.MatConstIterator() default constructor
opencv_core.MatConstIterator(int size)
opencv_core.MatConstIterator(opencv_core.Mat _m) constructor that sets the iterator to the beginning of the matrix
opencv_core.MatConstIterator(opencv_core.MatConstIterator it) copy constructor
opencv_core.MatConstIterator(opencv_core.Mat _m, int _row)
opencv_core.MatConstIterator(opencv_core.Mat _m, int _row, int _col) constructor that sets the iterator to the specified element of the matrix
opencv_core.MatConstIterator(opencv_core.Mat _m, opencv_core.Point _pt) constructor that sets the iterator to the specified element of the matrix
opencv_core.MatConstIterator(Pointer p)

Method Summary

Methods

Modifier and Type	Method and Description
opencv_core.MatConstIterator	addPut(long ofs) shifts the iterator forward by the specified number of elements
opencv_core.MatConstIterator	decrement() decrements the iterator
opencv_core.MatConstIterator	decrement(int arg0) decrements the iterator
long	elemSize()
opencv_core.MatConstIterator	elemSize(long elemSize)
BytePointer	get(long i) returns the i-th matrix element, relative to the current
opencv_core.MatConstIterator	increment() increments the iterator
opencv_core.MatConstIterator	increment(int arg0) increments the iterator
long	lpos()
opencv_core.Mat	m()
BytePointer	multiply() returns the current matrix element
opencv_core.Point	pos() returns the current iterator position
void	pos(int[] _idx)
void	pos(IntBuffer _idx)
void	pos(IntPointer _idx) returns the current iterator position
opencv_core.MatConstIterator	position(int position)
BytePointer	ptr()
opencv_core.MatConstIterator	ptr(BytePointer ptr)
opencv_core.MatConstIterator	put(opencv_core.MatConstIterator it) copy operator
void	seek(int[] _idx)
void	seek(int[] _idx, boolean relative)
void	seek(IntBuffer _idx)
void	seek(IntBuffer _idx, boolean relative)
void	seek(IntPointer _idx)
void	seek(IntPointer _idx, boolean relative)
void	seek(long ofs)
void	seek(long ofs, boolean relative)
BytePointer	sliceEnd()
opencv_core.MatConstIterator	sliceEnd(BytePointer sliceEnd)
BytePointer	sliceStart()
opencv_core.MatConstIterator	sliceStart(BytePointer sliceStart)
opencv_core.MatConstIterator	subtractPut(long ofs) shifts the iterator backward by the specified number of elements

Methods inherited from class org.bytedeco.javacpp.Pointer

address, asBuffer, asByteBuffer, capacity, capacity, deallocate, deallocate, deallocateReferences, deallocator, deallocator, equals, fill, hashCode, isNull, limit, limit, memchr, memcmp, memcpy, memmove, memset, offsetof, position, put, setNull, sizeof, toString, withDeallocator, zero

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

opencv_core.MatConstIterator

public opencv_core.MatConstIterator(Pointer p)

opencv_core.MatConstIterator

public opencv_core.MatConstIterator(int size)

opencv_core.MatConstIterator

public opencv_core.MatConstIterator()

default constructor

opencv_core.MatConstIterator

public opencv_core.MatConstIterator(opencv_core.Mat _m)

constructor that sets the iterator to the beginning of the matrix

opencv_core.MatConstIterator

public opencv_core.MatConstIterator(opencv_core.Mat _m,
                            int _row,
                            int _col)

constructor that sets the iterator to the specified element of the matrix

opencv_core.MatConstIterator

public opencv_core.MatConstIterator(opencv_core.Mat _m,
                            int _row)

opencv_core.MatConstIterator

public opencv_core.MatConstIterator(opencv_core.Mat _m,
                            opencv_core.Point _pt)

constructor that sets the iterator to the specified element of the matrix

opencv_core.MatConstIterator

public opencv_core.MatConstIterator(opencv_core.MatConstIterator it)

copy constructor

Method Detail

position

public opencv_core.MatConstIterator position(int position)

Overrides:

position in class Pointer

put

public opencv_core.MatConstIterator put(opencv_core.MatConstIterator it)

copy operator

multiply

public BytePointer multiply()

returns the current matrix element

get

public BytePointer get(long i)

returns the i-th matrix element, relative to the current

addPut

public opencv_core.MatConstIterator addPut(long ofs)

shifts the iterator forward by the specified number of elements

subtractPut

public opencv_core.MatConstIterator subtractPut(long ofs)

shifts the iterator backward by the specified number of elements

decrement

public opencv_core.MatConstIterator decrement()

decrements the iterator

decrement

public opencv_core.MatConstIterator decrement(int arg0)

decrements the iterator

increment

public opencv_core.MatConstIterator increment()

increments the iterator

increment

public opencv_core.MatConstIterator increment(int arg0)

increments the iterator

pos

public opencv_core.Point pos()

returns the current iterator position

pos

public void pos(IntPointer _idx)

returns the current iterator position

pos

public void pos(IntBuffer _idx)

pos

public void pos(int[] _idx)

lpos

public long lpos()

seek

public void seek(long ofs,
        boolean relative)

seek

public void seek(long ofs)

seek

public void seek(IntPointer _idx,
        boolean relative)

seek

public void seek(IntPointer _idx)

seek

public void seek(IntBuffer _idx,
        boolean relative)

seek

public void seek(IntBuffer _idx)

seek

public void seek(int[] _idx,
        boolean relative)

seek

public void seek(int[] _idx)

m

public opencv_core.Mat m()

elemSize

public long elemSize()

elemSize

public opencv_core.MatConstIterator elemSize(long elemSize)

ptr

public BytePointer ptr()

ptr

public opencv_core.MatConstIterator ptr(BytePointer ptr)

sliceStart

public BytePointer sliceStart()

sliceStart

public opencv_core.MatConstIterator sliceStart(BytePointer sliceStart)

sliceEnd

public BytePointer sliceEnd()

sliceEnd

public opencv_core.MatConstIterator sliceEnd(BytePointer sliceEnd)