Cv.FindContours Method (CvArr, CvMemStorage, CvSeq(CvPoint), Int32)

CvFindContours Method (CvArr, CvMemStorage, CvSeqCvPoint, Int32)

OpenCvSharp Class Library

Retrieves contours from the binary image and returns the number of retrieved contours.

Namespace: OpenCvSharp
Assembly: OpenCvSharp (in OpenCvSharp.dll) Version: 1.0.0.0 (1.0.0.0)

Syntax

public static int FindContours(
	CvArr image,
	CvMemStorage storage,
	out CvSeq<CvPoint> firstContour,
	int headerSize
)

Public Shared Function FindContours ( 
	image As CvArr,
	storage As CvMemStorage,
	<OutAttribute> ByRef firstContour As CvSeq(Of CvPoint),
	headerSize As Integer
) As Integer

public:
static int FindContours(
	CvArr^ image, 
	CvMemStorage^ storage, 
	[OutAttribute] CvSeq<CvPoint>^% firstContour, 
	int headerSize
)

static member FindContours : 
        image : CvArr * 
        storage : CvMemStorage * 
        firstContour : CvSeq<CvPoint> byref * 
        headerSize : int -> int

Parameters

image: Type: OpenCvSharpCvArr
The source 8-bit single channel image. Non-zero pixels are treated as 1’s, zero pixels remain 0’s - that is image treated as binary. To get such a binary image from grayscale, one may use cvThreshold, cvAdaptiveThreshold or cvCanny. The function modifies the source image content.
storage: Type: OpenCvSharpCvMemStorage
Container of the retrieved contours.
firstContour: Type: OpenCvSharpCvSeqCvPoint
Output parameter, will contain the pointer to the first outer contour.
headerSize: Type: SystemInt32
Size of the sequence header, >=sizeof(CvChain) if method=CV_CHAIN_CODE, and >=sizeof(CvContour) otherwise.

Return Value

Type: Int32
The number of retrieved contours.

Reference

Cv Class

FindContours Overload

OpenCvSharp Namespace