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Open Source Computer Vision Library
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116 lines
4.6 KiB
116 lines
4.6 KiB
\section{Matrix Reductions} |
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\cvCppFunc{gpu::meanStdDev} |
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Computes mean value and standard deviation of matrix elements. |
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\cvdefCpp{void meanStdDev(const GpuMat\& mtx, Scalar\& mean, Scalar\& stddev);} |
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\begin{description} |
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\cvarg{mtx}{Source matrix. \texttt{CV\_8UC1} matrices are supported for now.} |
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\cvarg{mean}{Mean value.} |
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\cvarg{stddev}{Standard deviation value.} |
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\end{description} |
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See also: \cvCppCross{meanStdDev}. |
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\cvCppFunc{gpu::norm} |
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Returns norm of matrix (or of two matrices difference). |
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\cvdefCpp{double norm(const GpuMat\& src1, int normType=NORM\_L2);} |
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\begin{description} |
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\cvarg{src1}{Source matrix. \texttt{CV\_8UC1} matrices are supported for now.} |
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\cvarg{normType}{Norm type. \texttt{NORM\_L1}, \texttt{NORM\_L2} and \texttt{NORM\_INF} are supported for now.} |
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\end{description} |
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\cvdefCpp{double norm(const GpuMat\& src1, const GpuMat\& src2,\par |
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int normType=NORM\_L2);} |
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\begin{description} |
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\cvarg{src1}{First source matrix. \texttt{CV\_8UC1} matrices are supported for now.} |
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\cvarg{src2}{Second source matrix. Must have the same size and type as \texttt{src1}}. |
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\cvarg{normType}{Norm type. \texttt{NORM\_L1}, \texttt{NORM\_L2} and \texttt{NORM\_INF} are supported for now.} |
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\end{description} |
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See also: \cvCppCross{norm}. |
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\cvCppFunc{gpu::sum} |
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Returns sum of matrix elements. |
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\cvdefCpp{Scalar sum(const GpuMat\& src);\newline |
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Scalar sum(const GpuMat\& src, GpuMat\& buf);} |
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\begin{description} |
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\cvarg{src}{Source image of any depth except \texttt{CV\_64F}, single-channel.} |
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\cvarg{buf}{Optional buffer to avoid extra memory allocations. It's resized automatically.} |
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\end{description} |
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See also: \cvCppCross{sum}. |
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\cvCppFunc{gpu::sqrSum} |
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Returns squared sum of matrix elements. |
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\cvdefCpp{Scalar sqrSum(const GpuMat\& src);\newline |
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Scalar sqrSum(const GpuMat\& src, GpuMat\& buf);} |
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\begin{description} |
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\cvarg{src}{Source image of any depth except \texttt{CV\_64F}, single-channel.} |
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\cvarg{buf}{Optional buffer to avoid extra memory allocations. It's resized automatically.} |
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\end{description} |
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\cvCppFunc{gpu::minMax} |
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Finds global minimum and maximum matrix elements and returns their values. |
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\cvdefCpp{void minMax(const GpuMat\& src, double* minVal,\par |
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double* maxVal=0, const GpuMat\& mask=GpuMat());\newline |
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void minMax(const GpuMat\& src, double* minVal, double* maxVal,\par |
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const GpuMat\& mask, GpuMat\& buf);} |
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\begin{description} |
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\cvarg{src}{Single-channel source image.} |
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\cvarg{minVal}{Pointer to returned minimum value. \texttt{NULL} if not required.} |
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\cvarg{maxVal}{Pointer to returned maximum value. \texttt{NULL} if not required.} |
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\cvarg{mask}{Optional mask to select a sub-matrix.} |
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\cvarg{buf}{Optional buffer to avoid extra memory allocations. It's resized automatically.} |
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\end{description} |
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Function doesn't work with \texttt{CV\_64F} images on GPU with compute capability $<$ 1.3.\newline |
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See also: \cvCppCross{minMaxLoc}. |
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\cvCppFunc{gpu::minMaxLoc} |
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Finds global minimum and maximum matrix elements and returns their values with locations. |
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\cvdefCpp{void minMaxLoc(const GpuMat\& src, double\* minVal, double* maxVal=0,\par |
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Point* minLoc=0, Point* maxLoc=0,\par |
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const GpuMat\& mask=GpuMat());\newline |
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void minMaxLoc(const GpuMat\& src, double* minVal, double* maxVal,\par |
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Point* minLoc, Point* maxLoc, const GpuMat\& mask,\par |
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GpuMat\& valbuf, GpuMat\& locbuf);} |
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\begin{description} |
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\cvarg{src}{Single-channel source image.} |
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\cvarg{minVal}{Pointer to returned minimum value. \texttt{NULL} if not required.} |
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\cvarg{maxVal}{Pointer to returned maximum value. \texttt{NULL} if not required.} |
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\cvarg{minValLoc}{Pointer to returned minimum location. \texttt{NULL} if not required.} |
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\cvarg{maxValLoc}{Pointer to returned maximum location. \texttt{NULL} if not required.} |
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\cvarg{mask}{Optional mask to select a sub-matrix.} |
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\cvarg{valbuf}{Optional values buffer to avoid extra memory allocations. It's resized automatically.} |
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\cvarg{locbuf}{Optional locations buffer to avoid extra memory allocations. It's resized automatically.} |
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\end{description} |
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Function doesn't work with \texttt{CV\_64F} images on GPU with compute capability $<$ 1.3.\newline |
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See also: \cvCppCross{minMaxLoc}. |
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\cvCppFunc{gpu::countNonZero} |
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Counts non-zero matrix elements. |
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\cvdefCpp{int countNonZero(const GpuMat\& src);\newline |
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int countNonZero(const GpuMat\& src, GpuMat\& buf);} |
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\begin{description} |
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\cvarg{src}{Single-channel source image.} |
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\cvarg{buf}{Optional buffer to avoid extra memory allocations. It's resized automatically.} |
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\end{description} |
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Function doesn't work with \texttt{CV\_64F} images on GPU with compute capability $<$ 1.3.\newline |
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See also: \cvCppCross{countNonZero}. |