MOESM6 of Image-based quantitative analysis of tear film lipid layer thickness for meibomian gland evaluation
2017-11-23T05:00:00Z (GMT) by
Additional file 6. The relationship between the threshold value and the captured shape of the pupil. The threshold value to identify pupil in our flood-fill algorithm was chosen as 5 out of 256 (8 bit data type.) (i) If we choose a lower threshold, only central sub-region of the pupil could be recognized as a full pupil (see threshold = 3 cases.) (ii) If we choose a higher threshold, then some regions of the iris could be incorrectly recognized as the pupil (see threshold = 7 cases).