gale-ieee.pdf (1.13 MB)
Detection of terrorist threats in air passenger luggage: expertise development
conference contribution
posted on 2010-05-28, 12:14 authored by Xi Liu, Alastair G. Gale, Tao SongCurrently, detecting potential threats in air
passenger baggage heavily depends on the human
examination of X-ray images of individual luggage items. In
order to improve the performance of airport security
personnel in searching images of air passenger luggage it is
important first to understand fully the requirements of the
demanding task. Here, an experiment is reported where eye
movements of naive observers and screeners were recorded
when they searched 30 X-ray images of air passenger
luggage for potential terrorist threat items such as guns,
knives and improvised explosive devices. Compared with
novices, the advantages of the screeners were speed and
accuracy in detecting threats. Eye position data revealed that
screeners were faster to fixate on target areas and once they
fixated on targets their hit rate was significantly higher. Most
of the IEDs were missed by both naive observers and
screeners due to interpretation errors which indicated the
importance of training. Stimulus salience at the first fixation
locations of naive observers and screeners was compared to
investigate expertise development. It was found that
experience did not change attention preference on stimuli
properties at the beginning of the observers visual search.
The implications and further studies are discussed.
History
School
- Science
Department
- Computer Science
Citation
LIU, X., GALE, A.G. and SONG, T., 2007. Detection of terrorist threats in air passenger luggage: expertise development. IN: 41st Annual IEEE International Carnahan Conference on Security Technology, Ottawa, Ont., 8-11 Oct., pp. 301 - 306Publisher
© IEEEVersion
- VoR (Version of Record)
Publication date
2007Notes
This is a conference paper [© IEEE]. It is also available at: http://ieeexplore.ieee.org/ Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.ISBN
9781424411290Language
- en