USE OF LINEAR DISCRIMINANT ANALYSIS IN THE DEVELOPMENT OF A WEAPON DETECTOR (FROM CARNAHAN CONFERENCE ON ELECTRONIC CRIME COUNTERMEASURES, 1973 - PROCEEDINGS, BY J S JACKSON AND R W DEVORE - SEE NCJ-10890)

• NCJ Number: 27563
• Author(s): G M JOURIS; G T MALLICK; R C MILLER; G J FAYCHAK
• Date Published: 1973
• Length: 5 pages
• Corporate Author: University of Kentucky; Institute of Electrical and Electronics Engineers
• Publication Format: Document
• Language: English
• Country: United States of America

Annotation

THE STATISTICAL TECHNIQUE OF LINEAR DISCRIMINANT ANALYSIS IS DESCRIBED AND ITS APPLICATION IN THE LOGIC DEVELOPMENT FOR A WEAPON DETECTOR IS DISCUSSED.

Abstract

THE ARTICLE COVERS AN EXPERIMENT TO DETERMINE THE FEASIBILITY OF USING ELECTROMAGNETIC TECHNIQUES TO INSPECT HAND CARRIED LUGGAGE FOR THE PRESENCE OF WEAPONS. ELECTROMAGNETIC MEASUREMENTS WERE MADE ON 2300 SEPARATE PIECES OF LUGGAGE CARRIED BY PASSENGERS BOARDING AIRCRAFT, WITH SEVEN DIFFERENT MEASUREMENTS BEING OBTAINED ON EACH BAG. WITH SUCH AN ENORMOUS AMOUNT OF DATA AT HAND, ONE CANNOT ANALYZE IT BY TRIAL AND ERROR AND EXPECT TO EFFICIENTLY DEVELOP A METHOD OF SEPARATING THE GUN CARRYING LUGGAGE FROM THE NORMAL LUGGAGE. THE EXPERIMENTERS EMPLOYED A STATISTICAL TECHNIQUE KNOWN AS 'LINEAR DISCRIMINANT ANALYSIS' TO SYSTEMATICALLY HANDLE THE DATA, AND TO DEVELOP A LOGIC SYSTEM CAPABLE OF REASONABLE DISCRIMINATION FOR THE BAGGAGE EXAMINED. THE PERFORMANCE WAS 85% DETECTION WITH A FALSE ALARM RATE OF 28%. (AUTHOR ABSTRACT)