mirror of
https://github.com/opencv/opencv.git
synced 2024-12-11 22:59:16 +08:00
446 lines
14 KiB
ReStructuredText
446 lines
14 KiB
ReStructuredText
Per-element Operations
|
|
=======================
|
|
|
|
.. highlight:: cpp
|
|
|
|
|
|
|
|
gpu::add
|
|
------------
|
|
Computes a matrix-matrix or matrix-scalar sum.
|
|
|
|
.. ocv:function:: void gpu::add( const GpuMat& a, const GpuMat& b, GpuMat& c, const GpuMat& mask=GpuMat(), int dtype=-1, Stream& stream=Stream::Null() )
|
|
|
|
.. ocv:function:: void gpu::add( const GpuMat& a, const Scalar& sc, GpuMat& c, const GpuMat& mask=GpuMat(), int dtype=-1, Stream& stream=Stream::Null() )
|
|
|
|
:param a: First source matrix.
|
|
|
|
:param b: Second source matrix to be added to ``a`` . Matrix should have the same size and type as ``a`` .
|
|
|
|
:param sc: A scalar to be added to ``a`` .
|
|
|
|
:param c: Destination matrix that has the same size and number of channels as the input array(s). The depth is defined by ``dtype`` or ``a`` depth.
|
|
|
|
:param mask: Optional operation mask, 8-bit single channel array, that specifies elements of the destination array to be changed.
|
|
|
|
:param dtype: Optional depth of the output array.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`add`
|
|
|
|
|
|
|
|
gpu::subtract
|
|
-----------------
|
|
Computes a matrix-matrix or matrix-scalar difference.
|
|
|
|
.. ocv:function:: void gpu::subtract( const GpuMat& a, const GpuMat& b, GpuMat& c, const GpuMat& mask=GpuMat(), int dtype=-1, Stream& stream=Stream::Null() )
|
|
|
|
.. ocv:function:: void gpu::subtract( const GpuMat& a, const Scalar& sc, GpuMat& c, const GpuMat& mask=GpuMat(), int dtype=-1, Stream& stream=Stream::Null() )
|
|
|
|
:param a: First source matrix.
|
|
|
|
:param b: Second source matrix to be added to ``a`` . Matrix should have the same size and type as ``a`` .
|
|
|
|
:param sc: A scalar to be added to ``a`` .
|
|
|
|
:param c: Destination matrix that has the same size and number of channels as the input array(s). The depth is defined by ``dtype`` or ``a`` depth.
|
|
|
|
:param mask: Optional operation mask, 8-bit single channel array, that specifies elements of the destination array to be changed.
|
|
|
|
:param dtype: Optional depth of the output array.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`subtract`
|
|
|
|
|
|
|
|
gpu::multiply
|
|
-----------------
|
|
Computes a matrix-matrix or matrix-scalar per-element product.
|
|
|
|
.. ocv:function:: void gpu::multiply( const GpuMat& a, const GpuMat& b, GpuMat& c, double scale=1, int dtype=-1, Stream& stream=Stream::Null() )
|
|
|
|
.. ocv:function:: void gpu::multiply( const GpuMat& a, const Scalar& sc, GpuMat& c, double scale=1, int dtype=-1, Stream& stream=Stream::Null() )
|
|
|
|
:param a: First source matrix.
|
|
|
|
:param b: Second source matrix to be multiplied by ``a`` elements.
|
|
|
|
:param sc: A scalar to be multiplied by ``a`` elements.
|
|
|
|
:param c: Destination matrix that has the same size and number of channels as the input array(s). The depth is defined by ``dtype`` or ``a`` depth.
|
|
|
|
:param scale: Optional scale factor.
|
|
|
|
:param dtype: Optional depth of the output array.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`multiply`
|
|
|
|
|
|
|
|
gpu::divide
|
|
-----------
|
|
Computes a matrix-matrix or matrix-scalar division.
|
|
|
|
.. ocv:function:: void gpu::divide( const GpuMat& a, const GpuMat& b, GpuMat& c, double scale=1, int dtype=-1, Stream& stream=Stream::Null() )
|
|
|
|
.. ocv:function:: void gpu::divide(const GpuMat& a, const Scalar& sc, GpuMat& c, double scale = 1, int dtype = -1, Stream& stream = Stream::Null())
|
|
|
|
.. ocv:function:: void gpu::divide( double scale, const GpuMat& b, GpuMat& c, int dtype=-1, Stream& stream=Stream::Null() )
|
|
|
|
:param a: First source matrix or a scalar.
|
|
|
|
:param b: Second source matrix. The ``a`` elements are divided by it.
|
|
|
|
:param sc: A scalar to be divided by the elements of ``a`` matrix.
|
|
|
|
:param c: Destination matrix that has the same size and number of channels as the input array(s). The depth is defined by ``dtype`` or ``a`` depth.
|
|
|
|
:param scale: Optional scale factor.
|
|
|
|
:param dtype: Optional depth of the output array.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
This function, in contrast to :ocv:func:`divide`, uses a round-down rounding mode.
|
|
|
|
.. seealso:: :ocv:func:`divide`
|
|
|
|
|
|
gpu::addWeighted
|
|
----------------
|
|
Computes the weighted sum of two arrays.
|
|
|
|
.. ocv:function:: void gpu::addWeighted(const GpuMat& src1, double alpha, const GpuMat& src2, double beta, double gamma, GpuMat& dst, int dtype = -1, Stream& stream = Stream::Null())
|
|
|
|
:param src1: First source array.
|
|
|
|
:param alpha: Weight for the first array elements.
|
|
|
|
:param src2: Second source array of the same size and channel number as ``src1`` .
|
|
|
|
:param beta: Weight for the second array elements.
|
|
|
|
:param dst: Destination array that has the same size and number of channels as the input arrays.
|
|
|
|
:param gamma: Scalar added to each sum.
|
|
|
|
:param dtype: Optional depth of the destination array. When both input arrays have the same depth, ``dtype`` can be set to ``-1``, which will be equivalent to ``src1.depth()``.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
The function ``addWeighted`` calculates the weighted sum of two arrays as follows:
|
|
|
|
.. math::
|
|
|
|
\texttt{dst} (I)= \texttt{saturate} ( \texttt{src1} (I)* \texttt{alpha} + \texttt{src2} (I)* \texttt{beta} + \texttt{gamma} )
|
|
|
|
where ``I`` is a multi-dimensional index of array elements. In case of multi-channel arrays, each channel is processed independently.
|
|
|
|
.. seealso:: :ocv:func:`addWeighted`
|
|
|
|
|
|
|
|
gpu::abs
|
|
------------
|
|
Computes an absolute value of each matrix element.
|
|
|
|
.. ocv:function:: void gpu::abs(const GpuMat& src, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src: Source matrix. Supports ``CV_16S`` and ``CV_32F`` depth.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`abs`
|
|
|
|
|
|
|
|
gpu::sqr
|
|
------------
|
|
Computes a square value of each matrix element.
|
|
|
|
.. ocv:function:: void gpu::sqr(const GpuMat& src, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src: Source matrix. Supports ``CV_8U`` , ``CV_16U`` , ``CV_16S`` and ``CV_32F`` depth.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
|
|
|
|
gpu::sqrt
|
|
------------
|
|
Computes a square root of each matrix element.
|
|
|
|
.. ocv:function:: void gpu::sqrt(const GpuMat& src, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src: Source matrix. Supports ``CV_8U`` , ``CV_16U`` , ``CV_16S`` and ``CV_32F`` depth.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`sqrt`
|
|
|
|
|
|
|
|
gpu::exp
|
|
------------
|
|
Computes an exponent of each matrix element.
|
|
|
|
.. ocv:function:: void gpu::exp( const GpuMat& a, GpuMat& b, Stream& stream=Stream::Null() )
|
|
|
|
:param a: Source matrix. Supports ``CV_8U`` , ``CV_16U`` , ``CV_16S`` and ``CV_32F`` depth.
|
|
|
|
:param b: Destination matrix with the same size and type as ``a`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`exp`
|
|
|
|
|
|
|
|
gpu::log
|
|
------------
|
|
Computes a natural logarithm of absolute value of each matrix element.
|
|
|
|
.. ocv:function:: void gpu::log( const GpuMat& a, GpuMat& b, Stream& stream=Stream::Null() )
|
|
|
|
:param a: Source matrix. Supports ``CV_8U`` , ``CV_16U`` , ``CV_16S`` and ``CV_32F`` depth.
|
|
|
|
:param b: Destination matrix with the same size and type as ``a`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`log`
|
|
|
|
|
|
|
|
gpu::pow
|
|
------------
|
|
Raises every matrix element to a power.
|
|
|
|
.. ocv:function:: void gpu::pow(const GpuMat& src, double power, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src: Source matrix. Supports all type, except ``CV_64F`` depth.
|
|
|
|
:param power: Exponent of power.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
The function ``pow`` raises every element of the input matrix to ``p`` :
|
|
|
|
.. math::
|
|
|
|
\texttt{dst} (I) = \fork{\texttt{src}(I)^p}{if \texttt{p} is integer}{|\texttt{src}(I)|^p}{otherwise}
|
|
|
|
.. seealso:: :ocv:func:`pow`
|
|
|
|
|
|
|
|
gpu::absdiff
|
|
----------------
|
|
Computes per-element absolute difference of two matrices (or of a matrix and scalar).
|
|
|
|
.. ocv:function:: void gpu::absdiff( const GpuMat& a, const GpuMat& b, GpuMat& c, Stream& stream=Stream::Null() )
|
|
|
|
.. ocv:function:: void gpu::absdiff( const GpuMat& a, const Scalar& s, GpuMat& c, Stream& stream=Stream::Null() )
|
|
|
|
:param a: First source matrix.
|
|
|
|
:param b: Second source matrix to be added to ``a`` .
|
|
|
|
:param s: A scalar to be added to ``a`` .
|
|
|
|
:param c: Destination matrix with the same size and type as ``a`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`absdiff`
|
|
|
|
|
|
|
|
gpu::compare
|
|
----------------
|
|
Compares elements of two matrices.
|
|
|
|
.. ocv:function:: void gpu::compare( const GpuMat& a, const GpuMat& b, GpuMat& c, int cmpop, Stream& stream=Stream::Null() )
|
|
|
|
.. ocv:function:: void gpu::compare(const GpuMat& a, Scalar sc, GpuMat& c, int cmpop, Stream& stream = Stream::Null())
|
|
|
|
:param a: First source matrix.
|
|
|
|
:param b: Second source matrix with the same size and type as ``a`` .
|
|
|
|
:param sc: A scalar to be compared with ``a`` .
|
|
|
|
:param c: Destination matrix with the same size as ``a`` and the ``CV_8UC1`` type.
|
|
|
|
:param cmpop: Flag specifying the relation between the elements to be checked:
|
|
|
|
* **CMP_EQ:** ``a(.) == b(.)``
|
|
* **CMP_GT:** ``a(.) > b(.)``
|
|
* **CMP_GE:** ``a(.) >= b(.)``
|
|
* **CMP_LT:** ``a(.) < b(.)``
|
|
* **CMP_LE:** ``a(.) <= b(.)``
|
|
* **CMP_NE:** ``a(.) != b(.)``
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`compare`
|
|
|
|
|
|
|
|
gpu::bitwise_not
|
|
--------------------
|
|
Performs a per-element bitwise inversion.
|
|
|
|
.. ocv:function:: void gpu::bitwise_not(const GpuMat& src, GpuMat& dst, const GpuMat& mask=GpuMat(), Stream& stream = Stream::Null())
|
|
|
|
:param src: Source matrix.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src`` .
|
|
|
|
:param mask: Optional operation mask. 8-bit single channel image.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
|
|
|
|
gpu::bitwise_or
|
|
-------------------
|
|
Performs a per-element bitwise disjunction of two matrices or of matrix and scalar.
|
|
|
|
.. ocv:function:: void gpu::bitwise_or(const GpuMat& src1, const GpuMat& src2, GpuMat& dst, const GpuMat& mask=GpuMat(), Stream& stream = Stream::Null())
|
|
.. ocv:function:: void gpu::bitwise_or(const GpuMat& src1, const Scalar& sc, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src1: First source matrix.
|
|
|
|
:param src2: Second source matrix with the same size and type as ``src1`` .
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src1`` .
|
|
|
|
:param mask: Optional operation mask. 8-bit single channel image.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
|
|
|
|
gpu::bitwise_and
|
|
--------------------
|
|
Performs a per-element bitwise conjunction of two matrices or of matrix and scalar.
|
|
|
|
.. ocv:function:: void gpu::bitwise_and(const GpuMat& src1, const GpuMat& src2, GpuMat& dst, const GpuMat& mask=GpuMat(), Stream& stream = Stream::Null())
|
|
.. ocv:function:: void gpu::bitwise_and(const GpuMat& src1, const Scalar& sc, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src1: First source matrix.
|
|
|
|
:param src2: Second source matrix with the same size and type as ``src1`` .
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src1`` .
|
|
|
|
:param mask: Optional operation mask. 8-bit single channel image.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
|
|
|
|
gpu::bitwise_xor
|
|
--------------------
|
|
Performs a per-element bitwise ``exclusive or`` operation of two matrices of matrix and scalar.
|
|
|
|
.. ocv:function:: void gpu::bitwise_xor(const GpuMat& src1, const GpuMat& src2, GpuMat& dst, const GpuMat& mask=GpuMat(), Stream& stream = Stream::Null())
|
|
.. ocv:function:: void gpu::bitwise_xor(const GpuMat& src1, const Scalar& sc, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src1: First source matrix.
|
|
|
|
:param src2: Second source matrix with the same size and type as ``src1`` .
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src1`` .
|
|
|
|
:param mask: Optional operation mask. 8-bit single channel image.
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
|
|
|
|
gpu::rshift
|
|
--------------------
|
|
Performs pixel by pixel right shift of an image by a constant value.
|
|
|
|
.. ocv:function:: void gpu::rshift( const GpuMat& src, Scalar_<int> sc, GpuMat& dst, Stream& stream=Stream::Null() )
|
|
|
|
:param src: Source matrix. Supports 1, 3 and 4 channels images with integers elements.
|
|
|
|
:param sc: Constant values, one per channel.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
|
|
|
|
gpu::lshift
|
|
--------------------
|
|
Performs pixel by pixel right left of an image by a constant value.
|
|
|
|
.. ocv:function:: void gpu::lshift( const GpuMat& src, Scalar_<int> sc, GpuMat& dst, Stream& stream=Stream::Null() )
|
|
|
|
:param src: Source matrix. Supports 1, 3 and 4 channels images with ``CV_8U`` , ``CV_16U`` or ``CV_32S`` depth.
|
|
|
|
:param sc: Constant values, one per channel.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
|
|
|
|
gpu::min
|
|
------------
|
|
Computes the per-element minimum of two matrices (or a matrix and a scalar).
|
|
|
|
.. ocv:function:: void gpu::min(const GpuMat& src1, const GpuMat& src2, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
.. ocv:function:: void gpu::min(const GpuMat& src1, double src2, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src1: First source matrix.
|
|
|
|
:param src2: Second source matrix or a scalar to compare ``src1`` elements with.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src1`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`min`
|
|
|
|
|
|
|
|
gpu::max
|
|
------------
|
|
Computes the per-element maximum of two matrices (or a matrix and a scalar).
|
|
|
|
.. ocv:function:: void gpu::max(const GpuMat& src1, const GpuMat& src2, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
.. ocv:function:: void gpu::max(const GpuMat& src1, double src2, GpuMat& dst, Stream& stream = Stream::Null())
|
|
|
|
:param src1: First source matrix.
|
|
|
|
:param src2: Second source matrix or a scalar to compare ``src1`` elements with.
|
|
|
|
:param dst: Destination matrix with the same size and type as ``src1`` .
|
|
|
|
:param stream: Stream for the asynchronous version.
|
|
|
|
.. seealso:: :ocv:func:`max`
|