Table 17.

Summary of Our 4-Fold Cross-Validation Experiment

Fold	Training Images	Validation Images	Total Training Subjects	Total Validation Subjects	Dark Skin Subjects in the Training Set	Dark Skin Subjects in the Validation Set
1	262	91	171	60	5	6
2	256	97	171	60	5	6
3	245	108	171	60	5	6
4	280	73	172	59	6	5

All four patient groups were split into training and validation four times.