Core Operations on Matrices =========================== .. highlight:: cpp gpu::merge ---------- Makes a multi-channel matrix out of several single-channel matrices. .. ocv:function:: void gpu::merge(const GpuMat* src, size_t n, OutputArray dst, Stream& stream = Stream::Null()) .. ocv:function:: void gpu::merge(const std::vector& src, OutputArray 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(InputArray src, GpuMat* dst, Stream& stream = Stream::Null()) .. ocv:function:: void gpu::split(InputArray src, vector& 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::transpose -------------- Transposes a matrix. .. ocv:function:: void gpu::transpose(InputArray src1, OutputArray dst, Stream& stream = Stream::Null()) :param src1: Source matrix. 1-, 4-, 8-byte element sizes are supported for now. :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(InputArray src, OutputArray 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::LookUpTable ---------------- .. ocv:class:: gpu::LookUpTable : public Algorithm Base class for transform using lookup table. :: class CV_EXPORTS LookUpTable : public Algorithm { public: virtual void transform(InputArray src, OutputArray dst, Stream& stream = Stream::Null()) = 0; }; .. seealso:: :ocv:func:`LUT` gpu::LookUpTable::transform --------------------------- Transforms the source matrix into the destination matrix using the given look-up table: ``dst(I) = lut(src(I))`` . .. ocv:function:: void gpu::LookUpTable::transform(InputArray src, OutputArray dst, Stream& stream = Stream::Null()) :param src: Source matrix. ``CV_8UC1`` and ``CV_8UC3`` matrices are supported for now. :param dst: Destination matrix. :param stream: Stream for the asynchronous version. gpu::createLookUpTable ---------------------- Creates implementation for :ocv:class:`gpu::LookUpTable` . .. ocv:function:: Ptr createLookUpTable(InputArray lut) :param lut: Look-up table of 256 elements. It is a continuous ``CV_8U`` matrix. gpu::copyMakeBorder ----------------------- Forms a border around an image. .. ocv:function:: void gpu::copyMakeBorder(InputArray src, OutputArray dst, int top, int bottom, int left, int right, int borderType, Scalar value = Scalar(), Stream& stream = Stream::Null()) :param src: Source image. ``CV_8UC1`` , ``CV_8UC4`` , ``CV_32SC1`` , and ``CV_32FC1`` types are supported. :param dst: Destination image with the same type as ``src``. The size is ``Size(src.cols+left+right, src.rows+top+bottom)`` . :param top: :param bottom: :param left: :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. :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. :param value: Border value. :param stream: Stream for the asynchronous version. .. seealso:: :ocv:func:`copyMakeBorder`