True 4D Image Denoising on the GPU

Algorithm 4

__device__  int  Shift_FFT_Coordinate(int  coordinate,  int  DATA_SIZE)

{

   if  (coordinate  >  (ceilf(DATA_SIZE/2)  −  1))

  {

   return  coordinate  −  ceilf(DATA_SIZE/2);

  }

   else

  {

   return  coordinate  +  floorf(DATA_SIZE/2);

  }

}