Transformation into bicubic Bezier forms 0,p Both S(u,v)and F(4,v)can be transformed into bicubic Bezier form: S4,)=∑∑bB(0B() i=0j=0 33 F(u,)=∑∑bB(0B() i=0j=0Transformation into bicubic Bézier forms  Both and can be transformed into bicubic Bézier form: 3 3 3 3 , 0 0 ( , ) ( ) ( ) i j i j i j u v B u B v = = S b =   S S( , ) u v F( , ) u v 3 3 3 3 , 0 0 ( , ) ( ) ( ) i j i j i j u v B u B v = = F b =   S F