Dixon T D, Nikolov S, Troscianko T, Noyes J, 2007, "Surveillance video assessment in visible and infrared displays by scanpath analysis" Perception 36 ECVP Abstract Supplement
Surveillance video assessment in visible and infrared displays by scanpath analysis
T D Dixon, S Nikolov, T Troscianko, J Noyes
The use of visible as well as infrared surveillance videos is now commonplace, and combining such inputs to create a composite sequence has been shown by the authors to improve accuracy in simple tracking tasks. In the current study, participants were asked to track visually a human target in two separate scenarios using three separate displays: visible; infrared; and 'video+ infrared' side-by-side (SBS). In the 'simple' scenario participants visually tracked a lone person, whilst in the 'complex' scenario they tracked a person moving around amongst a group of people, with both scenarios shown in two natural luminance levels. Participants also made key-press responses when predefined events occurred in the video. Results showed that infrared display generally allowed more accurate tracking of human targets, although within the 'complex' scenario SBS results the visible display led to higher accuracy, in contrast to the 'simple' scenario. A range of other findings are also discussed, including relating recent results to previous research, and future directions involving the use of CCTV camera footage.
[Funded by the UK MOD DIF-DTC. We thank the Eden Project, Cornwall, UK for support in the project.]
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