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

Table 6

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	70%	Knives	72.2%	50.5%
Guns			Guns	77.3%	54.1%
Smartphones			Smartphones	50%	35.0%
Nonpossession	No metal	70%	Nonpossession	85.7%	60.0%
Average	70%		71.3%		49.9%