RT Journal Article
T1 On the relationship between optical variability, visual saliency, and eye fixations: a computational approach
A1 García Díaz, Antón
A1 Leborán Álvarez, Víctor
A1 Fernández Vidal, Xosé Ramón
A1 Pardo López, Xosé Manuel
K1 Optical variability
K1 Contextual adaptation
K1 Saliency
K1 Efficient coding
K1 Eye fixations
K1 Face saliency
K1 Hyperspectral
AB A hierarchical definition of optical variability is proposed that links physical magnitudes to visual saliency and yields a more reductionist interpretation than previous approaches. This definition is shown to be grounded on the classical efficient coding hypothesis. Moreover, we propose that a major goal of contextual adaptation mechanisms is to ensure the invariance of the behavior that the contribution of an image point to optical variability elicits in the visual system. This hypothesis and the necessary assumptions are tested through the comparison with human fixations and state-of-the-art approaches to saliency in three open access eye-tracking datasets, including one devoted to images with faces, as well as in a novel experiment using hyperspectral representations of surface reflectance. The results on faces yield a significant reduction of the potential strength of semantic influences compared to previous works. The results on hyperspectral images support the assumptions to estimate optical variability. As well, the proposed approach explains quantitative results related to a visual illusion observed for images of corners, which does not involve eye movements
PB Association for Research in Vision and Ophthalmology
YR 2012
FD 2012
LK http://hdl.handle.net/10347/21259
UL http://hdl.handle.net/10347/21259
LA eng
NO Garcia-Diaz, A., Leborán, V., Fdez-Vidal, X. R., & Pardo, X. M. (2012). On the relationship between opticalvariability, visual saliency, and eye fixations: A computational approach. Journal of Vision, 12(6):17, 1–22, http://www.journalofvision.org/content/12/6/17, doi:10.1167/12.6.17
DS Minerva
RD 25 abr 2026