Checking original quad too, not only refinements

+7 true positive, no new false negative

Before:
Processing times (ms) results, on 1 iterations:
  n    Pixels   Average        SD
  8     76800       2.9       0.7
 16    307200      11.8       4.6
  1   1228800      34.2       0.0
  3   1920000      52.5      19.6
  4   7990272     298.4      97.4
89/573 tags were not detected.

Now:
Processing times (ms) results, on 1 iterations:
  n    Pixels   Average        SD
  8     76800       3.4       0.8
 16    307200      12.5       4.8
  1   1228800      35.1       0.0
  3   1920000      53.7      20.2
  4   7990272     300.5      99.0
82/573 tags were not detected.