====== Marking the quality of a registration ======
  -  Completely failed registration
  -  Outline of the specimen correctly registered but major internal mismatch
  -  Outline correct. Considerable internal mismatch
  -  Outline correct. Minor internal mismatch - Potentially usable
  -  Outline correct and internal correct - Usable

Colours: Purple: 1, Red: 2, Orange: 3, Yellow: 4, Green: 5.