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OpenCV
4.0.0
Open Source Computer Vision
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OpenCV
4.0.0
Open Source Computer Vision
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Namespaces | |
| compound | |
| core | |
| cpu | |
| fluid | |
| gpu | |
| imgproc | |
| own | |
Classes | |
| class | GBackend |
| class | GKernelPackage |
| A container class for heterogeneous kernel implementation collections. More... | |
Typedefs | |
| using | GLookupOrder = std::vector< GBackend > |
| Priority list of backends to use during kernel resolution process. More... | |
Functions | |
| GMat | absDiff (const GMat &src1, const GMat &src2) |
| Calculates the per-element absolute difference between two matrices. More... | |
| GMat | absDiffC (const GMat &src, const GScalar &c) |
| Calculates absolute value of matrix elements. More... | |
| GMat | add (const GMat &src1, const GMat &src2, int ddepth=-1) |
| Calculates the per-element sum of two matrices. More... | |
| GMat | addC (const GMat &src1, const GScalar &c, int ddepth=-1) |
| Calculates the per-element sum of matrix and given scalar. More... | |
| GMat | addC (const GScalar &c, const GMat &src1, int ddepth=-1) |
| GMat | addWeighted (const GMat &src1, double alpha, const GMat &src2, double beta, double gamma, int ddepth=-1) |
| Calculates the weighted sum of two matrices. More... | |
| GMat | BGR2Gray (const GMat &src) |
| Converts an image from BGR color space to gray-scaled. The conventional ranges for B, G, and R channel values are 0 to 255. Resulting gray color value computed as \[\texttt{dst} (I)= \texttt{0.114} * \texttt{src}(I).B + \texttt{0.587} * \texttt{src}(I).G + \texttt{0.299} * \texttt{src}(I).R \] . More... | |
| GMat | BGR2LUV (const GMat &src) |
| Converts an image from BGR color space to LUV color space. More... | |
| GMat | BGR2YUV (const GMat &src) |
| Converts an image from BGR color space to YUV color space. More... | |
| GMat | bitwise_and (const GMat &src1, const GMat &src2) |
| computes bitwise conjunction of the two matrixes (src1 & src2) Calculates the per-element bit-wise logical conjunction of two matrices of the same size. More... | |
| GMat | bitwise_and (const GMat &src1, const GScalar &src2) |
| GMat | bitwise_not (const GMat &src) |
| Inverts every bit of an array. The function bitwise_not calculates per-element bit-wise inversion of the input matrix: \[\texttt{dst} (I) = \neg \texttt{src} (I)\] . More... | |
| GMat | bitwise_or (const GMat &src1, const GMat &src2) |
| computes bitwise disjunction of the two matrixes (src1 | src2) Calculates the per-element bit-wise logical disjunction of two matrices of the same size. More... | |
| GMat | bitwise_or (const GMat &src1, const GScalar &src2) |
| GMat | bitwise_xor (const GMat &src1, const GMat &src2) |
| computes bitwise logical "exclusive or" of the two matrixes (src1 ^ src2) Calculates the per-element bit-wise logical "exclusive or" of two matrices of the same size. More... | |
| GMat | bitwise_xor (const GMat &src1, const GScalar &src2) |
| GMat | blur (const GMat &src, const Size &ksize, const Point &anchor=Point(-1,-1), int borderType=BORDER_DEFAULT, const Scalar &borderValue=Scalar(0)) |
| Blurs an image using the normalized box filter. More... | |
| GMat | boxFilter (const GMat &src, int dtype, const Size &ksize, const Point &anchor=Point(-1,-1), bool normalize=true, int borderType=BORDER_DEFAULT, const Scalar &borderValue=Scalar(0)) |
| Blurs an image using the box filter. More... | |
| GMat | Canny (const GMat &image, double threshold1, double threshold2, int apertureSize=3, bool L2gradient=false) |
| Finds edges in an image using the Canny algorithm. More... | |
| std::tuple< GMat, GMat > | cartToPolar (const GMat &x, const GMat &y, bool angleInDegrees=false) |
| Calculates the magnitude and angle of 2D vectors. More... | |
| GMat | cmpEQ (const GMat &src1, const GMat &src2) |
| Performs the per-element comparison of two matrices checking if elements from first matrix are equal to elements in second. More... | |
| GMat | cmpEQ (const GMat &src1, const GScalar &src2) |
| GMat | cmpGE (const GMat &src1, const GMat &src2) |
| Performs the per-element comparison of two matrices checking if elements from first matrix are greater or equal compare to elements in second. More... | |
| GMat | cmpGE (const GMat &src1, const GScalar &src2) |
| GMat | cmpGT (const GMat &src1, const GMat &src2) |
| Performs the per-element comparison of two matrices checking if elements from first matrix are greater compare to elements in second. More... | |
| GMat | cmpGT (const GMat &src1, const GScalar &src2) |
| GMat | cmpLE (const GMat &src1, const GMat &src2) |
| Performs the per-element comparison of two matrices checking if elements from first matrix are less or equal compare to elements in second. More... | |
| GMat | cmpLE (const GMat &src1, const GScalar &src2) |
| GMat | cmpLT (const GMat &src1, const GMat &src2) |
| Performs the per-element comparison of two matrices checking if elements from first matrix are less than elements in second. More... | |
| GMat | cmpLT (const GMat &src1, const GScalar &src2) |
| GMat | cmpNE (const GMat &src1, const GMat &src2) |
| Performs the per-element comparison of two matrices checking if elements from first matrix are not equal to elements in second. More... | |
| GMat | cmpNE (const GMat &src1, const GScalar &src2) |
| GKernelPackage | combine (const GKernelPackage &lhs, const GKernelPackage &rhs, const cv::unite_policy policy) |
| GMat | concatHor (const GMat &src1, const GMat &src2) |
| Applies horizontal concatenation to given matrices. More... | |
| GMat | concatHor (const std::vector< GMat > &v) |
| GMat | concatVert (const GMat &src1, const GMat &src2) |
| Applies vertical concatenation to given matrices. More... | |
| GMat | concatVert (const std::vector< GMat > &v) |
| GMat | convertTo (const GMat &src, int rdepth, double alpha=1, double beta=0) |
| Converts a matrix to another data depth with optional scaling. More... | |
| GMat | crop (const GMat &src, const Rect &rect) |
| Crops a 2D matrix. More... | |
| GMat | dilate (const GMat &src, const Mat &kernel, const Point &anchor=Point(-1,-1), int iterations=1, int borderType=BORDER_CONSTANT, const Scalar &borderValue=morphologyDefaultBorderValue()) |
| Dilates an image by using a specific structuring element. More... | |
| GMat | dilate3x3 (const GMat &src, int iterations=1, int borderType=BORDER_CONSTANT, const Scalar &borderValue=morphologyDefaultBorderValue()) |
| Dilates an image by using 3 by 3 rectangular structuring element. More... | |
| GMat | div (const GMat &src1, const GMat &src2, double scale, int ddepth=-1) |
| Performs per-element division of two matrices. More... | |
| GMat | divC (const GMat &src, const GScalar &divisor, double scale, int ddepth=-1) |
| Divides matrix by scalar. More... | |
| GMat | divRC (const GScalar ÷nt, const GMat &src, double scale, int ddepth=-1) |
| Divides scalar by matrix. More... | |
| GMat | equalizeHist (const GMat &src) |
| Equalizes the histogram of a grayscale image. More... | |
| GMat | erode (const GMat &src, const Mat &kernel, const Point &anchor=Point(-1,-1), int iterations=1, int borderType=BORDER_CONSTANT, const Scalar &borderValue=morphologyDefaultBorderValue()) |
| Erodes an image by using a specific structuring element. More... | |
| GMat | erode3x3 (const GMat &src, int iterations=1, int borderType=BORDER_CONSTANT, const Scalar &borderValue=morphologyDefaultBorderValue()) |
| Erodes an image by using 3 by 3 rectangular structuring element. More... | |
| GMat | filter2D (const GMat &src, int ddepth, const Mat &kernel, const Point &anchor=Point(-1,-1), const Scalar &delta=Scalar(0), int borderType=BORDER_DEFAULT, const Scalar &borderValue=Scalar(0)) |
| Convolves an image with the kernel. More... | |
| GMat | flip (const GMat &src, int flipCode) |
| Flips a 2D matrix around vertical, horizontal, or both axes. More... | |
| GMat | gaussianBlur (const GMat &src, const Size &ksize, double sigmaX, double sigmaY=0, int borderType=BORDER_DEFAULT, const Scalar &borderValue=Scalar(0)) |
| Blurs an image using a Gaussian filter. More... | |
| GMat | inRange (const GMat &src, const GScalar &threshLow, const GScalar &threshUp) |
| Applies a range-level threshold to each matrix element. More... | |
| std::tuple< GMat, GMat > | integral (const GMat &src, int sdepth=-1, int sqdepth=-1) |
| Calculates the integral of an image. More... | |
| void | island (const std::string &name, GProtoInputArgs &&ins, GProtoOutputArgs &&outs) |
| Define an tagged island (subgraph) within a computation. More... | |
| template<typename... KK> | |
| GKernelPackage | kernels () |
| Create a kernel package object containing kernels specified in variadic template argument. More... | |
| GLookupOrder | lookup_order (std::initializer_list< GBackend > &&list) |
| Create a backend lookup order – priority list of backends to use during graph compilation process. More... | |
| GMat | LUT (const GMat &src, const Mat &lut) |
| Performs a look-up table transform of a matrix. More... | |
| GMat | LUT3D (const GMat &src, const GMat &lut3D, int interpolation=INTER_NEAREST) |
| Performs a 3D look-up table transform of a multi-channel matrix. More... | |
| GMat | LUV2BGR (const GMat &src) |
| Converts an image from LUV color space to BGR color space. More... | |
| GMat | mask (const GMat &src, const GMat &mask) |
| Applies a mask to a matrix. More... | |
| GMat | max (const GMat &src1, const GMat &src2) |
| Calculates per-element maximum of two matrices. More... | |
| GScalar | mean (const GMat &src) |
| Calculates an average (mean) of matrix elements. More... | |
| GMat | medianBlur (const GMat &src, int ksize) |
| Blurs an image using the median filter. More... | |
| GMat | merge3 (const GMat &src1, const GMat &src2, const GMat &src3) |
| GMat | merge4 (const GMat &src1, const GMat &src2, const GMat &src3, const GMat &src4) |
| Creates one 3-channel (4-channel) matrix out of 3(4) single-channel ones. More... | |
| GMat | min (const GMat &src1, const GMat &src2) |
| Calculates per-element minimum of two matrices. More... | |
| GMat | mul (const GMat &src1, const GMat &src2, double scale=1.0, int ddepth=-1) |
| Calculates the per-element scaled product of two matrices. More... | |
| GMat | mulC (const GMat &src, double multiplier, int ddepth=-1) |
| Multiplies matrix by scalar. More... | |
| GMat | mulC (const GMat &src, const GScalar &multiplier, int ddepth=-1) |
| GMat | mulC (const GScalar &multiplier, const GMat &src, int ddepth=-1) |
| GScalar | normInf (const GMat &src) |
| Calculates the absolute infinite norm of a matrix. More... | |
| GScalar | normL1 (const GMat &src) |
| Calculates the absolute L1 norm of a matrix. More... | |
| GScalar | normL2 (const GMat &src) |
| Calculates the absolute L2 norm of a matrix. More... | |
| bool | operator!= (const GBackend &lhs, const GBackend &rhs) |
| GMat | phase (const GMat &x, const GMat &y, bool angleInDegrees=false) |
| Calculates the rotation angle of 2D vectors. More... | |
| std::tuple< GMat, GMat > | polarToCart (const GMat &magnitude, const GMat &angle, bool angleInDegrees=false) |
| Calculates x and y coordinates of 2D vectors from their magnitude and angle. More... | |
| GMat | remap (const GMat &src, const Mat &map1, const Mat &map2, int interpolation, int borderMode=BORDER_CONSTANT, const Scalar &borderValue=Scalar()) |
| Applies a generic geometrical transformation to an image. More... | |
| GMat | resize (const GMat &src, const Size &dsize, double fx=0, double fy=0, int interpolation=INTER_LINEAR) |
| Resizes an image. More... | |
| GMat | RGB2Gray (const GMat &src) |
| Converts an image from RGB color space to gray-scaled. The conventional ranges for R, G, and B channel values are 0 to 255. Resulting gray color value computed as \[\texttt{dst} (I)= \texttt{0.299} * \texttt{src}(I).R + \texttt{0.587} * \texttt{src}(I).G + \texttt{0.114} * \texttt{src}(I).B \] . More... | |
| GMat | RGB2Gray (const GMat &src, float rY, float gY, float bY) |
| GMat | RGB2Lab (const GMat &src) |
| Converts an image from RGB color space to Lab color space. More... | |
| GMat | RGB2YUV (const GMat &src) |
| Converts an image from RGB color space to YUV color space. More... | |
| GMat | select (const GMat &src1, const GMat &src2, const GMat &mask) |
| Select values from either first or second of input matrices by given mask. The function set to the output matrix either the value from the first input matrix if corresponding value of mask matrix is 255, or value from the second input matrix (if value of mask matrix set to 0). More... | |
| GMat | sepFilter (const GMat &src, int ddepth, const Mat &kernelX, const Mat &kernelY, const Point &anchor, const Scalar &delta, int borderType=BORDER_DEFAULT, const Scalar &borderValue=Scalar(0)) |
| Applies a separable linear filter to a matrix(image). More... | |
| GMat | Sobel (const GMat &src, int ddepth, int dx, int dy, int ksize=3, double scale=1, double delta=0, int borderType=BORDER_DEFAULT, const Scalar &borderValue=Scalar(0)) |
| Calculates the first, second, third, or mixed image derivatives using an extended Sobel operator. More... | |
| std::tuple< GMat, GMat, GMat > | split3 (const GMat &src) |
| std::tuple< GMat, GMat, GMat, GMat > | split4 (const GMat &src) |
| Divides a 3-channel (4-channel) matrix into 3(4) single-channel matrices. More... | |
| GMat | sqrt (const GMat &src) |
| Calculates a square root of array elements. More... | |
| GMat | sub (const GMat &src1, const GMat &src2, int ddepth=-1) |
| Calculates the per-element difference between two matrices. More... | |
| GMat | subC (const GMat &src, const GScalar &c, int ddepth=-1) |
| Calculates the per-element difference between matrix and given scalar. More... | |
| GMat | subRC (const GScalar &c, const GMat &src, int ddepth=-1) |
| Calculates the per-element difference between given scalar and the matrix. More... | |
| GScalar | sum (const GMat &src) |
| Calculates sum of all matrix elements. More... | |
| GMat | threshold (const GMat &src, const GScalar &thresh, const GScalar &maxval, int depth) |
| Applies a fixed-level threshold to each matrix element. More... | |
| std::tuple< GMat, GScalar > | threshold (const GMat &src, const GScalar &maxval, int depth) |
| GMat | YUV2BGR (const GMat &src) |
| Converts an image from YUV color space to BGR color space. More... | |
| GMat | YUV2RGB (const GMat &src) |
| Converts an image from YUV color space to RGB. The function converts an input image from YUV color space to RGB. The conventional ranges for Y, U, and V channel values are 0 to 255. More... | |
| GKernelPackage cv::gapi::combine | ( | const GKernelPackage & | lhs, |
| const GKernelPackage & | rhs, | ||
| const cv::unite_policy | policy | ||
| ) |
| lhs | "Left-hand-side" package in the process |
| rhs | "Right-hand-side" package in the process |
| policy | Unite policy which is used in case of conflicts – when the same kernel API is implemented in both packages by different backends; cv::unite_policy::KEEP keeps both implementation in the resulting package, while cv::unite_policy::REPLACE gives precedence two kernels from "Right-hand-side". |
| void cv::gapi::island | ( | const std::string & | name, |
| GProtoInputArgs && | ins, | ||
| GProtoOutputArgs && | outs | ||
| ) |
Define an tagged island (subgraph) within a computation.
Declare an Island tagged with name and defined from ins to outs (exclusively, as ins/outs are data objects, and regioning is done on operations level). Throws if any operation between ins and outs are already assigned to another island.
Islands allow to partition graph into subgraphs, fine-tuning the way it is scheduled by the underlying executor.
| name | name of the Island to create |
| ins | vector of input data objects where the subgraph begins |
| outs | vector of output data objects where the subgraph ends. |
The way how an island is defined is similar to how cv::GComputation is defined on input/output data objects. Same rules apply here as well – if there's no functional dependency between inputs and outputs or there's not enough input data objects were specified to properly calculate all outputs, an exception is thrown.
Use cv::GIn() / cv::GOut() to specify input/output vectors.
1.8.12