AI-Based W-Band Suspicious Object Detection System for Moving Persons: Two-Stage Walkthrough Configuration and Recognition Optimization

Table 4

An example of recall for two-stage screening ().

Objects	1st screening		2nd screening		Total recall RT
	Detection result	Recall R1	Classification result	Recall R2
Knives	Metal detection	90%	Knives	72.2%	65.0%
Guns			Guns	77.3%	69.6%
Smartphones			Smartphones	50%	45.0%
Nonpossession	No metal	90%	Nonpossession	85.7%	77.1%
Average	90%		71.3%		64.2%