Table 2.

The number of images per data set.

Data set	Esophagus	Stomach	Small bowel	Colon	Total images
Training/validation	9,061	466,562	3,242,639	474,776	4,193,038
- Down-sampling	9,061	11,508	32,252	11,707	64,528
- Training	6,795	8,631	24,189	8,780	48,395
- Validation	2,266	2,877	8,063	2,927	16,133
Testing	4,654	90,487	869,226	90,783	1,054,550