ESPCN 논문에서의 이해하지 못한점. about 2019-deeplearning-superresolution HOT 1 CLOSED

def PS(I, r):
  assert len(I.shape) == 3
  assert r>0
  r = int(r)
  O = np.zeros((I.shape[0]*r, I.shape[1]*r, I.shape[2]/(r*2)))
  for x in range(O.shape[0]):
    for y in range(O.shape[1]):
      for c in range(O.shape[2]):
        c += 1
        a = np.floor(x/r).astype("int")
        b = np.floor(y/r).astype("int")
        d = c*r*(y%r) + c*(x%r)
        print a, b, d
        O[x, y, c-1] = I[a, b, d]
  return O