// ConvexHull1 by G.Landini
// a morphological convex hull -- diamond shape
// 1 Dec 2003
// uses BinaryThick_.class avaliable from dentistry.bham.ac.uk/landinig
// assumes a white object on a black background

run("BinaryThick ", "kernel_a='1 2 2 1 0 2 1 2 2' rotations='rotate 90'  iterations=-1 white");