4.1图像的位置变换 三、图像的旋转 x'=xcos0-ysin0 y'=xsin0+ycos0 0=30° x'=0.866x-0.5y y'=0.5x+0.866y xmm=0.866-0.5*3=-0.634 xmx=0.866*3-0.5=2.098 ymim=0.866+0.5=1.366 y'max=0.866*3+0.5*3=4.0984.1 图像的位置变换 三、图像的旋转 î í ì = + = - q q q q ' sin cos ' cos sin y x y x x y q = 30° î í ì = + = - y x y x x y ' 0.5 0.866 ' 0.866 0.5 ' 0.866 0.5*3 0.634 x min = - = - x' max = 0.866*3- 0.5 = 2.098 ' 0.866 0.5 1.366 y min = + = y' max = 0.866*3+ 0.5*3 = 4.098