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Cv2ConvexityDefects Method (IEnumerablePoint2f, IEnumerableInt32)

Computes the contour convexity defects

Namespace:  OpenCvSharp
Assembly:  OpenCvSharp (in OpenCvSharp.dll) Version: 1.0.0
Syntax
public static Vec4i[] ConvexityDefects(
	IEnumerable<Point2f> contour,
	IEnumerable<int> convexHull
)

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.
See Also