Method ConvexityDefects

Computes the contour convexity defects

public static void ConvexityDefects(InputArray contour, InputArray convexHull, OutputArray convexityDefects)

contour InputArray: Input contour.
convexHull InputArray: Convex hull obtained using convexHull() that should contain indices of the contour points that make the hull.
convexityDefects OutputArray: 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.

Computes the contour convexity defects

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

contour IEnumerable<Point>: Input contour.
convexHull IEnumerable<int>: Convex hull obtained using convexHull() that should contain indices of the contour points that make the hull.

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.

Computes the contour convexity defects

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

contour IEnumerable<Point2f>: Input contour.
convexHull IEnumerable<int>: Convex hull obtained using convexHull() that should contain indices of the contour points that make the hull.

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.