Pengolahan Citra Digital

for y=1 : tinggi

for x=1 : lebar  

x2 = x * cosa + y * sina;      

       y2 = y * cosa - x * sina;      

if (x2>=1) && (x2<=lebar) && ...

           (y2>=1) && (y2<=tinggi)

           % Lakukan interpolasi bilinear

           p = floor(y2);

           q = floor(x2);

           a = y2-p;

           b = x2-q;