CvArr.FindContours Method (CvMemStorage, CvSeq(CvPoint), Int32, ContourRetrieval, ContourChain, CvPoint)

CvArrFindContours Method (CvMemStorage, CvSeqCvPoint, Int32, ContourRetrieval, ContourChain, CvPoint)

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 int FindContours(
	CvMemStorage storage,
	out CvSeq<CvPoint> firstContour,
	int headerSize,
	ContourRetrieval mode,
	ContourChain method,
	CvPoint offset
)

Public Function FindContours ( 
	storage As CvMemStorage,
	<OutAttribute> ByRef firstContour As CvSeq(Of CvPoint),
	headerSize As Integer,
	mode As ContourRetrieval,
	method As ContourChain,
	offset As CvPoint
) As Integer

public:
int FindContours(
	CvMemStorage^ storage, 
	[OutAttribute] CvSeq<CvPoint>^% firstContour, 
	int headerSize, 
	ContourRetrieval mode, 
	ContourChain method, 
	CvPoint offset
)

member FindContours : 
        storage : CvMemStorage * 
        firstContour : CvSeq<CvPoint> byref * 
        headerSize : int * 
        mode : ContourRetrieval * 
        method : ContourChain * 
        offset : CvPoint -> int

Parameters

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.
mode: Type: OpenCvSharpContourRetrieval
Retrieval mode.
method: Type: OpenCvSharpContourChain
Approximation method.
offset: Type: OpenCvSharpCvPoint
Offset, by which every contour point is shifted. This is useful if the contours are extracted from the image ROI and then they should be analyzed in the whole image context.

Return Value

Type: Int32
The number of retrieved contours.

Reference

CvArr Class

FindContours Overload

OpenCvSharp Namespace