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Face-pair scrutiny-subject-type classification

Brelstaff, Gavin J. and Brodo, Linda and Bicego, Manuele and Grosso, Enrico (2006) Face-pair scrutiny-subject-type classification. Perception, Vol. 35 (Suppl.), p. 209. eISSN 1468-4233. Article.

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Forensic, security, and health-care processes defer to human observers when identifying visual differences beyond a certain degree of subtlety. For identikit, or passport-like, controls this typically involves extensive scrutiny of face-pair images. We tested forty-nine naive subjects to examine how they would mark differences seen between face pairs. In each trial, one pair of face images was displayed, side-by-side, for 20 s while the subjects marked where they saw differences by clicking the mouse within the right-hand image. The face pairs were specially selected from the BANCA image archive to best represent a wide variety of degrees of difference. Here, we report only trials involving two face pairs: a very difficult, and a very easy to distinguish face pair. From the result we are, nevertheless, able to classify participants into distinct sets of subject types by a parametric analysis of the temporal and spatial characteristics of each individual's click-trail. A graphical presentation of the analysis and classification is available. Although provisional, this classification might prove useful for assessing candidate scrutinisers for real-world tasks.

Item Type:Article
ID Code:1918
Uncontrolled Keywords:Face pairs, parametric analysis
Subjects:Area 01 - Scienze matematiche e informatiche > INF/01 Informatica
Area 09 - Ingegneria industriale e dell'informazione > ING-INF/05 Sistemi di elaborazione delle informazioni
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze dei linguaggi
002 Altri enti e centri di ricerca del Nord Sardegna > POLARIS, Parco scientifico e tecnologico della Sardegna, Alghero
001 Università di Sassari > 01 Dipartimenti > Economia, impresa, regolamentazione
002 Altri enti e centri di ricerca del Nord Sardegna > CRS4 Center for Advanced Studies, Research and Development in Sardinia, Pula
Additional Information:Abstract from the ECVP 2006: 29. European Conference on Visual Perception, St. Petersburg, Russia, 20-25 August 2006.
Deposited On:18 Aug 2009 10:06

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