Table 4. Classification of images with the gold standard and deep learning framework according to the severity of ulcerations regardless their localization.

		Deep learning framework
		Normal	Aphthae	Ulcer	Fissure/large ulcer	Total
Gold standard	Normal	885	0	1	1	887
	Aphtae	9	146	14	0	169
	Ulcer	14	56	65	44	179
	Fissure/large ulcer	11	9	39	60	119
	Total	919	211	119	105	1354

Data are shown for the patient split used for training. The inter-modality agreement for severity of lesions is substantial (κ = 0.72).