Cv2.ConvexityDefects Method (IEnumerable(Point2f), IEnumerable(Int32))

Cv2ConvexityDefects Method (IEnumerablePoint2f, IEnumerableInt32)

OpenCvSharp Class Library

Computes the contour convexity defects

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

Syntax

C++

Copy

public static Vec4i[] ConvexityDefects(
	IEnumerable<Point2f> contour,
	IEnumerable<int> convexHull
)

Public Shared Function ConvexityDefects ( 
	contour As IEnumerable(Of Point2f),
	convexHull As IEnumerable(Of Integer)
) As Vec4i()

public:
static array<Vec4i>^ ConvexityDefects(
	IEnumerable<Point2f>^ contour, 
	IEnumerable<int>^ convexHull
)

static member ConvexityDefects : 
        contour : IEnumerable<Point2f> * 
        convexHull : IEnumerable<int> -> Vec4i[]

Parameters

contour: Type: System.Collections.GenericIEnumerablePoint2f
Input contour.
convexHull: Type: System.Collections.GenericIEnumerableInt32
Convex hull obtained using convexHull() that should contain indices of the contour points that make the hull.

Return Value

Type: Vec4i
The output vector of convexity defects. Each convexity defect is represented as 4-element integer vector (a.k.a. cv::Vec4i): (start_index, end_index, farthest_pt_index, fixpt_depth), where indices are 0-based indices in the original contour of the convexity defect beginning, end and the farthest point, and fixpt_depth is fixed-point approximation (with 8 fractional bits) of the distance between the farthest contour point and the hull. That is, to get the floating-point value of the depth will be fixpt_depth/256.0.

Reference

Cv2 Class

ConvexityDefects Overload

OpenCvSharp.CPlusPlus Namespace