U.J 



— 





0.2 





^^^ 2x2 H-piie 



00 



- 



\ 





^ 



Ix 



J. -0.1 



- 



Y^^ 



Ji -0.2 



- 



^■"""V./Vv''^ 



-0.3 



1 1 1 



1 1 1 1 1 1 



60° 80° 100° 120° 140° 160° 180° 200° 220° 240° 

 Orientation Angle,!' 



I xl H.pile 



60° 80° 100° 120° 140° 160° 180° 200° 220° 240° 

 Orientotion Angle, r 



Figure D-3. Zero crossings of [H(4)) - H((|;+180°)] for the two 

 patterns in Figure D-2. 



170 



