Atanassov’s Intuitionistic Fuzzy Sets (A-IFS) , described using two characteristic functions expressing the degree of membership and the degree of non-membership of elements of the universe to the A-IFS, provide a flexible mathematical fr a mework to deal with hesitancy along with the vagueness originating from the imperfect and imprecise information. A-IFS has been applied in many areas including pattern recognition and image processing