Simple pixel doubling (no filter)
#up_h
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
#up_v3
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
#up_v5
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
  0   0 128   0   0
