Anyone knows how to use getConvexHull();?

hamoid · February 11, 2019, 2:07am

Hi! If you look at the source code

atduskgreg/opencv-processing/blob/master/src/gab/opencv/Contour.java#L109


	 * @return
	 */
	public Contour getPolygonApproximation(){
		MatOfPoint2f approx = new MatOfPoint2f();
	    Imgproc.approxPolyDP(new MatOfPoint2f(inputPoints), approx, polygonApproximationFactor, true);
		return new Contour(parent, approx);
	}
	
	/**
	 * Calculate a convex hull from the current Contour.
	 * Returns a new Contour representing the convex hull.
	 * 
	 * @return Contour
	 */
	public Contour getConvexHull(){
		  MatOfInt hull = new MatOfInt();
		  MatOfPoint points = new MatOfPoint(pointMat);
		  
		  
		  Imgproc.convexHull(points, hull);
		  Point[] hp = new Point[hull.height()];

it seems like the method returns a new contour but you are not using it (not even storing it in a variable).

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Anyone knows how to use getConvexHull();?

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