mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
244 lines
7.5 KiB
244 lines
7.5 KiB
Operations on Matrices |
|
====================== |
|
|
|
.. highlight:: cpp |
|
|
|
|
|
|
|
gpu::gemm |
|
------------------ |
|
Performs generalized matrix multiplication. |
|
|
|
.. ocv:function:: void gemm(const GpuMat& src1, const GpuMat& src2, double alpha, const GpuMat& src3, double beta, GpuMat& dst, int flags = 0, Stream& stream = Stream::Null()) |
|
|
|
:param src1: First multiplied input matrix that should have ``CV_32FC1`` , ``CV_64FC1`` , ``CV_32FC2`` , or ``CV_64FC2`` type. |
|
|
|
:param src2: Second multiplied input matrix of the same type as ``src1`` . |
|
|
|
:param alpha: Weight of the matrix product. |
|
|
|
:param src3: Third optional delta matrix added to the matrix product. It should have the same type as ``src1`` and ``src2`` . |
|
|
|
:param beta: Weight of ``src3`` . |
|
|
|
:param dst: Destination matrix. It has the proper size and the same type as input matrices. |
|
|
|
:param flags: Operation flags: |
|
|
|
* **GEMM_1_T** transpose ``src1`` |
|
* **GEMM_2_T** transpose ``src2`` |
|
* **GEMM_3_T** transpose ``src3`` |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
The function performs generalized matrix multiplication similar to the ``gemm`` functions in BLAS level 3. For example, ``gemm(src1, src2, alpha, src3, beta, dst, GEMM_1_T + GEMM_3_T)`` corresponds to |
|
|
|
.. math:: |
|
|
|
\texttt{dst} = \texttt{alpha} \cdot \texttt{src1} ^T \cdot \texttt{src2} + \texttt{beta} \cdot \texttt{src3} ^T |
|
|
|
.. note:: Transposition operation doesn't support ``CV_64FC2`` input type. |
|
|
|
.. seealso:: :ocv:func:`gemm` |
|
|
|
|
|
|
|
gpu::transpose |
|
------------------ |
|
Transposes a matrix. |
|
|
|
.. ocv:function:: void gpu::transpose(const GpuMat& src, GpuMat& dst, Stream& stream = Stream::Null()) |
|
|
|
:param src: Source matrix. 1-, 4-, 8-byte element sizes are supported for now (CV_8UC1, CV_8UC4, CV_16UC2, CV_32FC1, etc). |
|
|
|
:param dst: Destination matrix. |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`transpose` |
|
|
|
|
|
|
|
gpu::flip |
|
------------- |
|
Flips a 2D matrix around vertical, horizontal, or both axes. |
|
|
|
.. ocv:function:: void gpu::flip(const GpuMat& src, GpuMat& dst, int flipCode, Stream& stream = Stream::Null()) |
|
|
|
:param src: Source matrix. Supports 1, 3 and 4 channels images with ``CV_8U``, ``CV_16U``, ``CV_32S`` or ``CV_32F`` depth. |
|
|
|
:param dst: Destination matrix. |
|
|
|
:param flipCode: Flip mode for the source: |
|
|
|
* ``0`` Flips around x-axis. |
|
|
|
* ``>0`` Flips around y-axis. |
|
|
|
* ``<0`` Flips around both axes. |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`flip` |
|
|
|
|
|
|
|
gpu::LUT |
|
------------ |
|
Transforms the source matrix into the destination matrix using the given look-up table: ``dst(I) = lut(src(I))`` |
|
|
|
.. ocv:function:: void gpu::LUT(const GpuMat& src, const Mat& lut, GpuMat& dst, Stream& stream = Stream::Null()) |
|
|
|
:param src: Source matrix. ``CV_8UC1`` and ``CV_8UC3`` matrices are supported for now. |
|
|
|
:param lut: Look-up table of 256 elements. It is a continuous ``CV_8U`` matrix. |
|
|
|
:param dst: Destination matrix with the same depth as ``lut`` and the same number of channels as ``src`` . |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`LUT` |
|
|
|
|
|
|
|
gpu::merge |
|
-------------- |
|
Makes a multi-channel matrix out of several single-channel matrices. |
|
|
|
.. ocv:function:: void gpu::merge(const GpuMat* src, size_t n, GpuMat& dst, Stream& stream = Stream::Null()) |
|
|
|
.. ocv:function:: void gpu::merge(const vector<GpuMat>& src, GpuMat& dst, Stream& stream = Stream::Null()) |
|
|
|
:param src: Array/vector of source matrices. |
|
|
|
:param n: Number of source matrices. |
|
|
|
:param dst: Destination matrix. |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`merge` |
|
|
|
|
|
|
|
gpu::split |
|
-------------- |
|
Copies each plane of a multi-channel matrix into an array. |
|
|
|
.. ocv:function:: void gpu::split(const GpuMat& src, GpuMat* dst, Stream& stream = Stream::Null()) |
|
|
|
.. ocv:function:: void gpu::split(const GpuMat& src, vector<GpuMat>& dst, Stream& stream = Stream::Null()) |
|
|
|
:param src: Source matrix. |
|
|
|
:param dst: Destination array/vector of single-channel matrices. |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`split` |
|
|
|
|
|
|
|
gpu::magnitude |
|
------------------ |
|
Computes magnitudes of complex matrix elements. |
|
|
|
.. ocv:function:: void gpu::magnitude(const GpuMat& xy, GpuMat& magnitude, Stream& stream = Stream::Null()) |
|
|
|
.. ocv:function:: void gpu::magnitude(const GpuMat& x, const GpuMat& y, GpuMat& magnitude, Stream& stream = Stream::Null()) |
|
|
|
:param xy: Source complex matrix in the interleaved format ( ``CV_32FC2`` ). |
|
|
|
:param x: Source matrix containing real components ( ``CV_32FC1`` ). |
|
|
|
:param y: Source matrix containing imaginary components ( ``CV_32FC1`` ). |
|
|
|
:param magnitude: Destination matrix of float magnitudes ( ``CV_32FC1`` ). |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`magnitude` |
|
|
|
|
|
|
|
gpu::magnitudeSqr |
|
--------------------- |
|
Computes squared magnitudes of complex matrix elements. |
|
|
|
.. ocv:function:: void gpu::magnitudeSqr(const GpuMat& xy, GpuMat& magnitude, Stream& stream = Stream::Null()) |
|
|
|
.. ocv:function:: void gpu::magnitudeSqr(const GpuMat& x, const GpuMat& y, GpuMat& magnitude, Stream& stream = Stream::Null()) |
|
|
|
:param xy: Source complex matrix in the interleaved format ( ``CV_32FC2`` ). |
|
|
|
:param x: Source matrix containing real components ( ``CV_32FC1`` ). |
|
|
|
:param y: Source matrix containing imaginary components ( ``CV_32FC1`` ). |
|
|
|
:param magnitude: Destination matrix of float magnitude squares ( ``CV_32FC1`` ). |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
|
|
|
|
gpu::phase |
|
-------------- |
|
Computes polar angles of complex matrix elements. |
|
|
|
.. ocv:function:: void gpu::phase(const GpuMat& x, const GpuMat& y, GpuMat& angle, bool angleInDegrees=false, Stream& stream = Stream::Null()) |
|
|
|
:param x: Source matrix containing real components ( ``CV_32FC1`` ). |
|
|
|
:param y: Source matrix containing imaginary components ( ``CV_32FC1`` ). |
|
|
|
:param angle: Destionation matrix of angles ( ``CV_32FC1`` ). |
|
|
|
:param angleInDegrees: Flag for angles that must be evaluated in degress. |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`phase` |
|
|
|
|
|
|
|
gpu::cartToPolar |
|
-------------------- |
|
Converts Cartesian coordinates into polar. |
|
|
|
.. ocv:function:: void gpu::cartToPolar(const GpuMat& x, const GpuMat& y, GpuMat& magnitude, GpuMat& angle, bool angleInDegrees=false, Stream& stream = Stream::Null()) |
|
|
|
:param x: Source matrix containing real components ( ``CV_32FC1`` ). |
|
|
|
:param y: Source matrix containing imaginary components ( ``CV_32FC1`` ). |
|
|
|
:param magnitude: Destination matrix of float magnitudes ( ``CV_32FC1`` ). |
|
|
|
:param angle: Destionation matrix of angles ( ``CV_32FC1`` ). |
|
|
|
:param angleInDegrees: Flag for angles that must be evaluated in degress. |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`cartToPolar` |
|
|
|
|
|
|
|
gpu::polarToCart |
|
-------------------- |
|
Converts polar coordinates into Cartesian. |
|
|
|
.. ocv:function:: void gpu::polarToCart(const GpuMat& magnitude, const GpuMat& angle, GpuMat& x, GpuMat& y, bool angleInDegrees=false, Stream& stream = Stream::Null()) |
|
|
|
:param magnitude: Source matrix containing magnitudes ( ``CV_32FC1`` ). |
|
|
|
:param angle: Source matrix containing angles ( ``CV_32FC1`` ). |
|
|
|
:param x: Destination matrix of real components ( ``CV_32FC1`` ). |
|
|
|
:param y: Destination matrix of imaginary components ( ``CV_32FC1`` ). |
|
|
|
:param angleInDegrees: Flag that indicates angles in degress. |
|
|
|
:param stream: Stream for the asynchronous version. |
|
|
|
.. seealso:: :ocv:func:`polarToCart`
|
|
|