Slide
Centre Interdisciplinaire
de Recherche et d’Innovation
en Cybersécurité et Société
de Recherche et d’Innovation
en Cybersécurité et Société
1.
Royer, J.; Willenbockel, V.; Blais, C.; Gosselin, F.; Lafortune, S.; Leclerc, J.; Fiset, D.
The influence of natural contour and face size on the spatial frequency tuning for identifying upright and inverted faces Journal Article
In: Psychological Research, vol. 81, no. 1, pp. 13–23, 2017, ISSN: 03400727, (Publisher: Springer Verlag).
Abstract | Links | BibTeX | Tags: adult, anatomy and histology, Face, female, Form Perception, human, Humans, male, Pattern Recognition, Visual
@article{royer_influence_2017,
title = {The influence of natural contour and face size on the spatial frequency tuning for identifying upright and inverted faces},
author = {J. Royer and V. Willenbockel and C. Blais and F. Gosselin and S. Lafortune and J. Leclerc and D. Fiset},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84952682687&doi=10.1007%2fs00426-015-0740-3&partnerID=40&md5=338e8de567bcb78a38dc37e35297d569},
doi = {10.1007/s00426-015-0740-3},
issn = {03400727},
year = {2017},
date = {2017-01-01},
journal = {Psychological Research},
volume = {81},
number = {1},
pages = {13–23},
abstract = {It has previously been proposed that holistic face processing is based on low spatial frequencies (SFs) whereas featural processing relies on higher SFs, a hypothesis still widespread in the face processing literature today (e.g. Peters et al. in Eur J Neurosci 37(9):1448–1457, 2013). Since upright faces are supposedly recognized through holistic processing and inverted faces, using features, it is easy to take the leap to suggest a qualitatively different SF tuning for the identification of upright and vs. inverted faces. However, two independent studies (e.g. Gaspar et al. in Vision Res 48(28):2817–2826, 2008; Willenbockel et al. in J Exp Psychol Human 36(1):122–135, 2010a) found the same SF tuning for both stimulus presentations. Since these authors used relatively small faces hiding the natural facial contour, it is possible that differences in the SF tuning for identifying upright and inverted faces were missed. The present study thus revisits the SF tuning for upright and inverted faces face identification using the SF Bubbles technique. Our results still indicate that the same SFs are involved in both upright and inverted face recognition regardless of these additional parameters (contour and size), thus contrasting with previous data obtained using different methods (e.g. Oruc and Barton in J Vis 10(12):20, 1–12, 2010). The possible reasons subtending this divergence are discussed. © 2015, Springer-Verlag Berlin Heidelberg.},
note = {Publisher: Springer Verlag},
keywords = {adult, anatomy and histology, Face, female, Form Perception, human, Humans, male, Pattern Recognition, Visual},
pubstate = {published},
tppubtype = {article}
}
It has previously been proposed that holistic face processing is based on low spatial frequencies (SFs) whereas featural processing relies on higher SFs, a hypothesis still widespread in the face processing literature today (e.g. Peters et al. in Eur J Neurosci 37(9):1448–1457, 2013). Since upright faces are supposedly recognized through holistic processing and inverted faces, using features, it is easy to take the leap to suggest a qualitatively different SF tuning for the identification of upright and vs. inverted faces. However, two independent studies (e.g. Gaspar et al. in Vision Res 48(28):2817–2826, 2008; Willenbockel et al. in J Exp Psychol Human 36(1):122–135, 2010a) found the same SF tuning for both stimulus presentations. Since these authors used relatively small faces hiding the natural facial contour, it is possible that differences in the SF tuning for identifying upright and inverted faces were missed. The present study thus revisits the SF tuning for upright and inverted faces face identification using the SF Bubbles technique. Our results still indicate that the same SFs are involved in both upright and inverted face recognition regardless of these additional parameters (contour and size), thus contrasting with previous data obtained using different methods (e.g. Oruc and Barton in J Vis 10(12):20, 1–12, 2010). The possible reasons subtending this divergence are discussed. © 2015, Springer-Verlag Berlin Heidelberg.
2.
Blais, C.; Arguin, M.; Marleau, I.
Orientation invariance in visual shape perception Journal Article
In: Journal of Vision, vol. 9, no. 2, 2009, ISSN: 15347362.
Abstract | Links | BibTeX | Tags: adult, article, association, attention, Cues, Depth Perception, Form Perception, human, Humans, methodology, Orientation, Pattern Recognition, Photic Stimulation, photostimulation, physiology, Rotation, vision, Visual Perception, Young Adult
@article{blais_orientation_2009,
title = {Orientation invariance in visual shape perception},
author = {C. Blais and M. Arguin and I. Marleau},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-60649103374&doi=10.1167%2f9.2.14&partnerID=40&md5=1fb771ae6c96e3a0ad4e92a307a12d1d},
doi = {10.1167/9.2.14},
issn = {15347362},
year = {2009},
date = {2009-01-01},
journal = {Journal of Vision},
volume = {9},
number = {2},
abstract = {To assess directly the orientation-invariance of specific shape representation stages in humans, we examined whether rotation (on the image plane or in depth) modulates the conjunction and linear non-separability effects in a shape visual search task (M. Arguin & D. Saumier, 2000; D. Saumier & M. Arguin, 2003). A series of visual search experiments involving simple 2D or 3D shapes show that these target type effects are entirely resistant to both planar and depth rotations. It was found however, that resistance to depth rotation only occurred when the 3D shapes had a richly textured surface but not when they had a uniform surface, with shading as the only reliable depth cue. The results also indicate that both planar and depth rotations affected performance indexes not concerned with the target type effects (i.e. overall RTs and magnitude of display size and target presence effects). Overall, the present findings suggest that the shape representations subtending the conjunction and linear non-separability effects are invariant across both planar and depth rotations whereas other shape representation stages involved in the task are orientation-specific. © ARVO.},
keywords = {adult, article, association, attention, Cues, Depth Perception, Form Perception, human, Humans, methodology, Orientation, Pattern Recognition, Photic Stimulation, photostimulation, physiology, Rotation, vision, Visual Perception, Young Adult},
pubstate = {published},
tppubtype = {article}
}
To assess directly the orientation-invariance of specific shape representation stages in humans, we examined whether rotation (on the image plane or in depth) modulates the conjunction and linear non-separability effects in a shape visual search task (M. Arguin & D. Saumier, 2000; D. Saumier & M. Arguin, 2003). A series of visual search experiments involving simple 2D or 3D shapes show that these target type effects are entirely resistant to both planar and depth rotations. It was found however, that resistance to depth rotation only occurred when the 3D shapes had a richly textured surface but not when they had a uniform surface, with shading as the only reliable depth cue. The results also indicate that both planar and depth rotations affected performance indexes not concerned with the target type effects (i.e. overall RTs and magnitude of display size and target presence effects). Overall, the present findings suggest that the shape representations subtending the conjunction and linear non-separability effects are invariant across both planar and depth rotations whereas other shape representation stages involved in the task are orientation-specific. © ARVO.