I am looking to count the sharp pointy triangular things in the image. However I was unable to do so. One approach I did try was take a convex hull of the contour and then find convex defects but it led to lot of irregularities. You can find the it in the labelled image below.
Ok I solved this problem using a simple solution. After I computed my convex defects in my countours, I performed a point polygon test and found the distance between the point in the convex defect and the hull. And I gave a threshold after looking at the distance of the points and all the sharp points were in the threshold greater than approximately 30. So this filtered my points