Spatial Vision , Vol. 18, No. 4, pp. 413 – 430 (2005) VSP 2005. Also available online - www.vsppub.com Saliency predicts change detection in pictures of natural scenes MICHAEL J. WRIGHT ∗ Centre for Cognition and Neuroimaging, Brunel University, Uxbridge, Middlesex UB8 3PH, UK Received 26 June 2004; accepted 15 November 2004 Abstract —It has been proposed that the visual system encodes the salience of objects in the visual field in an explicit two-dimensional map that guides visual selective attention. Experiments were conducted to determine whether salience measurements applied to regions of pictures of outdoor scenes could predict the detection of changes in those regions. To obtain a quantitative measure of change detection, observers located changes in pairs of colour pictures presented across an inter- stimulus interval (ISI). Salience measurements were then obtained from different observers for image change regions using three independent methods, and all were positively correlated with change detection. Factor analysis extracted a single saliency factor that accounted for 62% of the variance contained in the four measures. Finally, estimates of the magnitude of the image change in each picture pair were obtained, using nine separate visual filters representing low-level vision features (luminance, colour,
Spatial Vision (continued as Seeing & Perceiving from 2010) – Brill
Published: Jan 1, 2005
Keywords: ATTENTION; CHANGE BLINDNESS; NATURAL SCENES; SALIENCY
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