Table 2. The precision percent validation (PPV).

	HPFT	ORIGINAL SIFT	FAST	SURF	STAR
pylorus	0.85	0.63	0.33	0.57	0.51
cardia	0.83	0.65	0.31	0.52	0.47
angularis	0.82	0.78	0.42	0.67	0.53
antral anterior wall	0.62	0.47	0.28	0.53	0.34
antral posterior wall	0.77	0.43	0.37	0.47	0.34
gastric body lesser curvature	0.76	0.59	0.11	0.32	0.27
gastric body greater curvature	0.69	0.57	0.25	0.41	0.43