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Convex Hull in OpenCV

What is convex hull?

  • A Convex object is one with no interior angles greater than 180 degrees.
  • Hull means the exterior or the shape of the object.
  • Hence, onvex Hull of a shape or a group of points is a tight fitting convex boundary around the points or the shape.

Convex Hull in OpenCV:

  • We can find convex hull in opencv by firstly making the image binary and finding the contours in the image.
  • Convex hull in OpenCV can be obatined with the help of the following method
    cv2.convexHull()

Actual image:

Image

Images with contours and convex hulls

Here blue lines show the convex hull for the yellow contours

Image

Author

Rohini Rao