ocr: X- 0.866X - 0.5y Y'- 0.5X + 0.866y (0,0) (0,4) (0,0) (0,4) A B CI - DI E A a Rotation FI - G Hi! J F G C KIL M NI L K - H D,E (2,0) (2,4) M N (4,0) (4,4) Forward Transiormation rechnique X - = 0.866X + 0.5y, 0.5x' Y-0 0.866y' - (0,0) (0,4) (0,0) (0,4) A B C D E A Rotation F - G H J G B C K L M N - H - E (2,0) (2,4) (2,0) (2,4) Inverse Transtormation l'echnique (nearest neighbour)