opencv/modules/gpu/doc/matrix_reductions.rst

183 lines
5.2 KiB
ReStructuredText
Raw Normal View History

Matrix Reductions
=================
.. highlight:: cpp
.. index:: gpu::meanStdDev
2011-03-03 08:29:55 +01:00
gpu::meanStdDev
-------------------
.. cpp:function:: void gpu::meanStdDev(const GpuMat& mtx, Scalar& mean, Scalar& stddev)
2011-02-26 12:05:10 +01:00
Computes mean value and standard deviation of matrix elements.
:param mtx: Source matrix. ``CV_8UC1`` matrices are supported for now.
2011-02-26 12:05:10 +01:00
:param mean: Mean value.
2011-02-26 12:05:10 +01:00
:param stddev: Standard deviation value.
See also: :c:func:`meanStdDev`.
.. index:: gpu::norm
2011-03-03 08:29:55 +01:00
gpu::norm
-------------
.. cpp:function:: double gpu::norm(const GpuMat& src, int normType=NORM_L2)
2011-02-26 12:05:10 +01:00
Returns norm of matrix (or of two matrices difference).
2011-02-26 12:05:10 +01:00
:param src: Source matrix. Any matrices except 64F are supported.
:param normType: Norm type. ``NORM_L1``, ``NORM_L2`` and ``NORM_INF`` are supported for now.
.. cpp:function:: double gpu::norm(const GpuMat& src, int normType, GpuMat& buf)
:param src: Source matrix. Any matrices except 64F are supported.
:param normType: Norm type. ``NORM_L1``, ``NORM_L2`` and ``NORM_INF`` are supported for now.
:param buf: Optional buffer to avoid extra memory allocations. It's resized automatically.
.. cpp:function:: double gpu::norm(const GpuMat& src1, const GpuMat& src2, int normType=NORM_L2)
:param src1: First source matrix. ``CV_8UC1`` matrices are supported for now.
:param src2: Second source matrix. Must have the same size and type as ``src1``.
:param normType: Norm type. ``NORM_L1``, ``NORM_L2`` and ``NORM_INF`` are supported for now.
See also: :c:func:`norm`.
.. index:: gpu::sum
2011-03-03 08:29:55 +01:00
gpu::sum
------------
.. cpp:function:: Scalar gpu::sum(const GpuMat& src)
.. cpp:function:: Scalar gpu::sum(const GpuMat& src, GpuMat& buf)
2011-02-26 12:05:10 +01:00
Returns sum of matrix elements.
:param src: Source image of any depth except ``CV_64F``.
2011-02-26 12:05:10 +01:00
:param buf: Optional buffer to avoid extra memory allocations. It's resized automatically.
See also: :c:func:`sum`.
.. index:: gpu::absSum
2011-03-03 08:29:55 +01:00
gpu::absSum
---------------
.. cpp:function:: Scalar gpu::absSum(const GpuMat& src)
.. cpp:function:: Scalar gpu::absSum(const GpuMat& src, GpuMat\& buf)
2011-02-26 12:05:10 +01:00
Returns sum of matrix elements absolute values.
:param src: Source image of any depth except ``CV_64F``.
2011-02-26 12:05:10 +01:00
:param buf: Optional buffer to avoid extra memory allocations. It's resized automatically.
.. index:: gpu::sqrSum
2011-03-03 08:29:55 +01:00
gpu::sqrSum
---------------
.. cpp:function:: Scalar gpu::sqrSum(const GpuMat& src)
.. cpp:function:: Scalar gpu::sqrSum(const GpuMat& src, GpuMat\& buf)
2011-02-26 12:05:10 +01:00
Returns squared sum of matrix elements.
:param src: Source image of any depth except ``CV_64F``.
2011-02-26 12:05:10 +01:00
:param buf: Optional buffer to avoid extra memory allocations. It's resized automatically.
.. index:: gpu::minMax
2011-03-03 08:29:55 +01:00
gpu::minMax
---------------
.. cpp:function:: void gpu::minMax(const GpuMat& src, double* minVal, double* maxVal=0, const GpuMat& mask=GpuMat())
.. cpp:function:: void gpu::minMax(const GpuMat& src, double* minVal, double* maxVal, const GpuMat& mask, GpuMat& buf)
2011-02-26 12:05:10 +01:00
Finds global minimum and maximum matrix elements and returns their values.
2011-02-26 12:05:10 +01:00
:param src: Single-channel source image.
:param minVal: Pointer to returned minimum value. ``NULL`` if not required.
:param maxVal: Pointer to returned maximum value. ``NULL`` if not required.
2011-02-26 12:05:10 +01:00
:param mask: Optional mask to select a sub-matrix.
2011-02-26 12:05:10 +01:00
:param buf: Optional buffer to avoid extra memory allocations. It's resized automatically.
Function doesn't work with ``CV_64F`` images on GPU with compute capability :math:`<` 1.3.
See also: :c:func:`minMaxLoc`.
.. index:: gpu::minMaxLoc
2011-03-03 08:29:55 +01:00
gpu::minMaxLoc
------------------
.. cpp:function:: void gpu::minMaxLoc(const GpuMat& src, double* minVal, double* maxVal=0, Point* minLoc=0, Point* maxLoc=0, const GpuMat& mask=GpuMat())
.. cpp:function:: void gpu::minMaxLoc(const GpuMat& src, double* minVal, double* maxVal, Point* minLoc, Point* maxLoc, const GpuMat& mask, GpuMat& valbuf, GpuMat& locbuf)
2011-02-26 12:05:10 +01:00
Finds global minimum and maximum matrix elements and returns their values with locations.
2011-02-26 12:05:10 +01:00
:param src: Single-channel source image.
:param minVal: Pointer to returned minimum value. ``NULL`` if not required.
:param maxVal: Pointer to returned maximum value. ``NULL`` if not required.
:param minValLoc: Pointer to returned minimum location. ``NULL`` if not required.
:param maxValLoc: Pointer to returned maximum location. ``NULL`` if not required.
2011-02-26 12:05:10 +01:00
:param mask: Optional mask to select a sub-matrix.
2011-02-26 12:05:10 +01:00
:param valbuf: Optional values buffer to avoid extra memory allocations. It's resized automatically.
2011-02-26 12:05:10 +01:00
:param locbuf: Optional locations buffer to avoid extra memory allocations. It's resized automatically.
Function doesn't work with ``CV_64F`` images on GPU with compute capability :math:`<` 1.3.
See also: :c:func:`minMaxLoc`.
2011-02-26 12:05:10 +01:00
.. index:: gpu::countNonZero
2011-03-03 08:29:55 +01:00
gpu::countNonZero
---------------------
.. cpp:function:: int gpu::countNonZero(const GpuMat& src)
.. cpp:function:: int gpu::countNonZero(const GpuMat& src, GpuMat& buf)
2011-02-26 12:05:10 +01:00
Counts non-zero matrix elements.
2011-02-26 12:05:10 +01:00
:param src: Single-channel source image.
2011-02-26 12:05:10 +01:00
:param buf: Optional buffer to avoid extra memory allocations. It's resized automatically.
Function doesn't work with ``CV_64F`` images on GPU with compute capability :math:`<` 1.3.
See also: :c:func:`countNonZero`.