Example: Rotate

• Rotate (src, dst, theta):

  
  

for (int x = 0; x < xmax; x++) {

for (int y = 0; y < ymax; y++) {

float u = x*cos(-Q) - y*sin(-Q);

float u = x*sin(-Q) + y*cos(-Q);

dst(x,y) = resample_src(u,v,w);

}

}

Rotate

45

v

u

(u,v)

x = ucosQ - vsinQ
y = usinQ + vcosQ

y

x

(x,y)

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