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129 lines
3.8 KiB
ReStructuredText
129 lines
3.8 KiB
ReStructuredText
Core Operations on Matrices
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===========================
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.. highlight:: cpp
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gpu::merge
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--------------
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Makes a multi-channel matrix out of several single-channel matrices.
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.. ocv:function:: void gpu::merge(const GpuMat* src, size_t n, GpuMat& dst, Stream& stream = Stream::Null())
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.. ocv:function:: void gpu::merge(const vector<GpuMat>& src, GpuMat& dst, Stream& stream = Stream::Null())
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:param src: Array/vector of source matrices.
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:param n: Number of source matrices.
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:param dst: Destination matrix.
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:param stream: Stream for the asynchronous version.
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.. seealso:: :ocv:func:`merge`
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gpu::split
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--------------
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Copies each plane of a multi-channel matrix into an array.
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.. ocv:function:: void gpu::split(const GpuMat& src, GpuMat* dst, Stream& stream = Stream::Null())
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.. ocv:function:: void gpu::split(const GpuMat& src, vector<GpuMat>& dst, Stream& stream = Stream::Null())
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:param src: Source matrix.
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:param dst: Destination array/vector of single-channel matrices.
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:param stream: Stream for the asynchronous version.
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.. seealso:: :ocv:func:`split`
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gpu::copyMakeBorder
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-----------------------
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Forms a border around an image.
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.. ocv:function:: void gpu::copyMakeBorder(const GpuMat& src, GpuMat& dst, int top, int bottom, int left, int right, int borderType, const Scalar& value = Scalar(), Stream& stream = Stream::Null())
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:param src: Source image. ``CV_8UC1`` , ``CV_8UC4`` , ``CV_32SC1`` , and ``CV_32FC1`` types are supported.
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:param dst: Destination image with the same type as ``src``. The size is ``Size(src.cols+left+right, src.rows+top+bottom)`` .
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:param top:
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:param bottom:
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:param left:
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:param right: Number of pixels in each direction from the source image rectangle to extrapolate. For example: ``top=1, bottom=1, left=1, right=1`` mean that 1 pixel-wide border needs to be built.
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:param borderType: Border type. See :ocv:func:`borderInterpolate` for details. ``BORDER_REFLECT101`` , ``BORDER_REPLICATE`` , ``BORDER_CONSTANT`` , ``BORDER_REFLECT`` and ``BORDER_WRAP`` are supported for now.
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:param value: Border value.
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:param stream: Stream for the asynchronous version.
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.. seealso:: :ocv:func:`copyMakeBorder`
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gpu::transpose
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------------------
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Transposes a matrix.
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.. ocv:function:: void gpu::transpose( const GpuMat& src1, GpuMat& dst, Stream& stream=Stream::Null() )
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:param src1: Source matrix. 1-, 4-, 8-byte element sizes are supported for now (CV_8UC1, CV_8UC4, CV_16UC2, CV_32FC1, etc).
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:param dst: Destination matrix.
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:param stream: Stream for the asynchronous version.
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.. seealso:: :ocv:func:`transpose`
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gpu::flip
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-------------
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Flips a 2D matrix around vertical, horizontal, or both axes.
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.. ocv:function:: void gpu::flip( const GpuMat& a, GpuMat& b, int flipCode, Stream& stream=Stream::Null() )
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:param a: Source matrix. Supports 1, 3 and 4 channels images with ``CV_8U``, ``CV_16U``, ``CV_32S`` or ``CV_32F`` depth.
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:param b: Destination matrix.
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:param flipCode: Flip mode for the source:
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* ``0`` Flips around x-axis.
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* ``>0`` Flips around y-axis.
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* ``<0`` Flips around both axes.
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:param stream: Stream for the asynchronous version.
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.. seealso:: :ocv:func:`flip`
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gpu::LUT
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------------
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Transforms the source matrix into the destination matrix using the given look-up table: ``dst(I) = lut(src(I))``
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.. ocv:function:: void gpu::LUT(const GpuMat& src, const Mat& lut, GpuMat& dst, Stream& stream = Stream::Null())
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:param src: Source matrix. ``CV_8UC1`` and ``CV_8UC3`` matrices are supported for now.
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:param lut: Look-up table of 256 elements. It is a continuous ``CV_8U`` matrix.
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:param dst: Destination matrix with the same depth as ``lut`` and the same number of channels as ``src`` .
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:param stream: Stream for the asynchronous version.
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.. seealso:: :ocv:func:`LUT`
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