OpenCvSharp Documented Class Library
OpenCvSharp
Cv2 Class
Cv2 Methods
Abs Method
Absdiff Method
Accumulate Method
AccumulateProduct Method
AccumulateSquare Method
AccumulateWeighted Method
AdaptiveThreshold Method
Add Method
AddWeighted Method
AGAST Method
AlignSize Method
ApplyColorMap Method
ApproxPolyDP Method
ArcLength Method
ArrowedLine Method
BatchDistance Method
BilateralFilter Method
BitwiseAnd Method
BitwiseNot Method
BitwiseOr Method
BitwiseXor Method
BlendLinear Method
Blur Method
BorderInterpolate Method
BoundingRect Method
BoxFilter Method
BoxPoints Method
BuildOpticalFlowPyramid Method
CalcBackProject Method
CalcCovarMatrix Method
CalcHist Method
CalcOpticalFlowFarneback Method
CalcOpticalFlowPyrLK Method
CalibrateCamera Method
CalibrationMatrixValues Method
CamShift Method
Canny Method
CartToPolar Method
CheckChessboard Method
CheckHardwareSupport Method
CheckRange Method
Circle Method
ClipLine Method
ColorChange Method
Compare Method
CompareHist Method
CompleteSymm Method
ComposeRT Method
ComputeCorrespondEpilines Method
ComputeRecallPrecisionCurve Method
ConnectedComponents Method
ConnectedComponentsEx Method
ConnectedComponentsWithAlgorithm Method
ConnectedComponentsWithStats Method
ConnectedComponentsWithStatsWithAlgorithm Method
ContourArea Method
ConvertFp16 Method
ConvertMaps Method
ConvertPointsFromHomogeneous Method
ConvertPointsHomogeneous Method
ConvertPointsToHomogeneous Method
ConvertScaleAbs Method
ConvexHull Method
ConvexHullIndices Method
ConvexityDefects Method
CopyMakeBorder Method
CopyTo Method
CornerEigenValsAndVecs Method
CornerSubPix Method
CorrectMatches Method
CountNonZero Method
CreateCLAHE Method
CreateFrameSource_Camera Method
CreateFrameSource_Empty Method
CreateFrameSource_Video Method
CreateFrameSource_Video_CUDA Method
CreateHanningWindow Method
CreateOptFlow_Brox_GPU Method
CreateOptFlow_DualTVL1_GPU Method
CreateOptFlow_Farneback Method
CreateOptFlow_Farneback_GPU Method
CreateOptFlow_PyrLK_GPU Method
CreateSuperResolution_BTVL1 Method
CreateSuperResolution_BTVL1_CUDA Method
CreateTrackbar Method
CubeRoot Method
CvtColor Method
CvtColorTwoPlane Method
Dct Method
Decolor Method
DecomposeHomographyMat Method
DecomposeProjectionMatrix Method
Demosaicing Method
DenoiseTVL1 Method
DestroyAllWindows Method
DestroyWindow Method
DetailEnhance Method
Determinant Method
Dft Method
Dilate Method
DistanceTransform Method
DistanceTransformWithLabels Method
Divide Method
DrawChessboardCorners Method
DrawContours Method
DrawFrameAxes Method
DrawKeypoints Method
DrawMarker Method
DrawMatches Method
DrawMatchesKnn Method
EdgePreservingFilter Method
Eigen Method
EigenNonSymmetric Method
Ellipse Method
Ellipse2Poly Method
EMD Method
EqualizeHist Method
Erode Method
EstimateAffine2D Method
EstimateAffine3D Method
EstimateAffinePartial2D Method
EvaluateFeatureDetector Method
Exp Method
ExtractChannel Method
FAST Method
FastAtan2 Method
FastNlMeansDenoising Method
FastNlMeansDenoisingColored Method
FastNlMeansDenoisingColoredMulti Method
FastNlMeansDenoisingMulti Method
FillConvexPoly Method
FillPoly Method
Filter2D Method
FilterHomographyDecompByVisibleRefpoints Method
FilterSpeckles Method
Find4QuadCornerSubpix Method
FindChessboardCorners Method
FindChessboardCornersSB Method
FindCirclesGrid Method
FindContours Method
FindContoursAsArray Method
FindContoursAsMat Method
FindEssentialMat Method
FindFundamentalMat Method
FindHomography Method
FindNonZero Method
FitEllipse Method
FitEllipseAMS Method
FitEllipseDirect Method
FitLine Method
Flip Method
FloodFill Method
Format Method
GaussianBlur Method
Gemm Method
GetAffineTransform Method
GetBuildInformation Method
GetCpuFeaturesLine Method
GetCpuTickCount Method
GetDefaultNewCameraMatrix Method
GetDerivKernels Method
GetFontScaleFromHeight Method
GetGaborKernel Method
GetGaussianKernel Method
GetHardwareFeatureName Method
GetMouseWheelDelta Method
GetNearestPoint Method
GetNumberOfCpus Method
GetNumThreads Method
GetOptimalDFTSize Method
GetOptimalNewCameraMatrix Method
GetPerspectiveTransform Method
GetRecall Method
GetRectSubPix Method
GetRotationMatrix2D Method
GetStructuringElement Method
GetTextSize Method
GetTheRNG Method
GetThreadNum Method
GetTickCount Method
GetTickFrequency Method
GetTrackbarPos Method
GetValidDisparityROI Method
GetVersionMajor Method
GetVersionMinor Method
GetVersionRevision Method
GetVersionString Method
GetWindowImageRect Method
GetWindowProperty Method
Glob Method
GoodFeaturesToTrack Method
GrabCut Method
GroupRectangles Method
GroupRectanglesMeanshift Method
HaveImageReader Method
HaveImageWriter Method
HConcat Method
HoughCircles Method
HoughLines Method
HoughLinesP Method
HoughLinesPointSet Method
Idct Method
Idft Method
IlluminationChange Method
ImDecode Method
ImEncode Method
ImRead Method
ImReadMulti Method
ImShow Method
ImWrite Method
InitCameraMatrix2D Method
Initialize Method
InitUndistortRectifyMap Method
InitWideAngleProjMap Method
Inpaint Method
InRange Method
InsertChannel Method
Integral Method
IntersectConvexConvex Method
Invert Method
InvertAffineTransform Method
IsContourConvex Method
Kmeans Method
Laplacian Method
Line Method
LinearPolar Method
Log Method
LogPolar Method
LUT Method
Magnitude Method
Mahalanobis Method
MatchShapes Method
MatchTemplate Method
MatMulDeriv Method
Max Method
Mean Method
MeanShift Method
MeanStdDev Method
MedianBlur Method
Merge Method
Min Method
MinAreaRect Method
MinEnclosingCircle Method
MinEnclosingTriangle Method
MinMaxIdx Method
MinMaxLoc Method
MixChannels Method
Moments Method
MorphologyDefaultBorderValue Method
MorphologyEx Method
MoveWindow Method
MulSpectrums Method
Multiply Method
MulTransposed Method
NamedWindow Method
Norm Method
Normalize Method
Partition(T) Method
PatchNaNs Method
PCABackProject Method
PCACompute Method
PCAComputeVar Method
PCAProject Method
PencilSketch Method
PerspectiveTransform Method
Phase Method
PhaseCorrelate Method
PointPolygonTest Method
PolarToCart Method
Polylines Method
Pow Method
PreCornerDetect Method
ProjectPoints Method
PSNR Method
PutText Method
PyrDown Method
PyrMeanShiftFiltering Method
PyrUp Method
Randn Method
RandShuffle Method
Randu Method
RecoverPose Method
Rectangle Method
Rectify3Collinear Method
Reduce Method
Remap Method
Repeat Method
ReprojectImageTo3D Method
Resize Method
ResizeWindow Method
Rodrigues Method
Rotate Method
RotatedRectangleIntersection Method
RQDecomp3x3 Method
SampsonDistance Method
ScaleAdd Method
Scharr Method
SeamlessClone Method
SelectROI Method
SelectROIs Method
SepFilter2D Method
SetBreakOnError Method
SetIdentity Method
SetMouseCallback Method
SetNumThreads Method
SetTheRNG Method
SetTrackbarMax Method
SetTrackbarMin Method
SetTrackbarPos Method
SetUseOptimized Method
SetWindowProperty Method
SetWindowTitle Method
Sobel Method
Solve Method
SolveCubic Method
SolveLP Method
SolvePnP Method
SolvePnPRansac Method
SolvePoly Method
Sort Method
SortIdx Method
SpatialGradient Method
Split Method
SqrBoxFilter Method
Sqrt Method
StartWindowThread Method
StereoCalibrate Method
StereoRectify Method
StereoRectifyUncalibrated Method
Stylization Method
Subtract Method
Sum Method
SVBackSubst Method
SVDecomp Method
TextureFlattening Method
Threshold Method
Trace Method
Transform Method
Transpose Method
TriangulatePoints Method
Undistort Method
UndistortPoints Method
UndistortPointsIter Method
UseOptimized Method
ValidateDisparity Method
VConcat Method
WaitKey Method
WaitKeyEx Method
WarpAffine Method
WarpPerspective Method
WarpPolar Method
Watershed Method
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Cv2CountNonZero Method

computes the number of nonzero array elements

Namespace:  OpenCvSharp
Assembly:  OpenCvSharp (in OpenCvSharp.dll) Version: 1.0.0
Syntax
Copy
public static int CountNonZero(
	InputArray mtx
)

Parameters

mtx
Type: OpenCvSharpInputArray
Single-channel array

Return Value

Type: Int32
number of non-zero elements in mtx
See Also