Suppose that we have two fuzzy sets: P represents the number of black pixels $($e$.$g$..$ none with black pixels, $21,$ a few with black pixels, $22,$ a several of black pixels, $23,$ and a lot of black pixels, $24)$ and S represents the shape of the black pixel clusters $($e$.$g$.,$ S$1$ is an ellipse, S$2$ is a pentagon and S$3$ is a circle$),$ So$,$ we have;