calculating longest distance

Suppose i have an image and chosen an object as an center. now i want to calculate the longest distance from the center and make that object another center..now again want to choose an object that is farthest from both the previous centers...So plz some help me to code this..thnks

Answer 1

[bym]

doc voronoi

may help

[pdp rpa]

thnks but i m nt gettin it ..can u plz explain me?