thumbnail

Pseudo-holographic device elicits rapid depth cues despite random-dot surface masking

Gavin Brelstaff, Marco Agus, Enrico Gobbetti, and Gianluigi Zanetti

2007

Abstract

Experiments with random-dot masking demonstrate that, in the absence of cues mundanely available to 2-D displays (object occlusion, surface shading, perspective foreshortening, and texture gradients), Holografika's large-screen multi-projector video system (COHERENT-IST-FP6-510166) elicits useful stereoscopic and motion-parallax depth cues, and does so in under 2 s. We employed a simplified version of Julesz's (c. 1971) famous spiral ramp surface: a 3-layer cylindrical wedding-cake-via an openGL model that subjects viewed along its concentric axis. By adjusting its parameters, two sets of model-stimuli were rendered: one with a uniform large field of depth and one where the field was effectively flat. Each of eleven, pre-screened, subjects completed four experiments, each consisting of eight trials in a 2IFC design whereby they indicated in which interval they perceived the greatest field of depth. The experiments tested one-eye static, one-eye head-swaying, two-eye static, and two-eye head-swaying observation-in that order. Scores improved also in that order.

Reference and download information

Gavin Brelstaff, Marco Agus, Enrico Gobbetti, and Gianluigi Zanetti. Pseudo-holographic device elicits rapid depth cues despite random-dot surface masking. In Perception, ECVP 2007 Abstract Supplement. Volume 36. Pages 202, 2007.

Related multimedia productions

Bibtex citation record

@InProceedings{Brelstaff:2007:PDE,
    author = {Gavin Brelstaff and Marco Agus and Enrico Gobbetti and Gianluigi Zanetti},
    title = {Pseudo-holographic device elicits rapid depth cues despite random-dot surface masking},
    booktitle = {Perception, ECVP 2007 Abstract Supplement},
    volume = {36},
    pages = {202},
    address = {Conference held in Arezzo, Italy},
    year = {2007},
    abstract = { Experiments with random-dot masking demonstrate that, in the absence of cues mundanely available to 2-D displays (object occlusion, surface shading, perspective foreshortening, and texture gradients), Holografika's large-screen multi-projector video system (COHERENT-IST-FP6-510166) elicits useful stereoscopic and motion-parallax depth cues, and does so in under 2 s. We employed a simplified version of Julesz's (c. 1971) famous spiral ramp surface: a 3-layer cylindrical wedding-cake--via an openGL model that subjects viewed along its concentric axis. By adjusting its parameters, two sets of model-stimuli were rendered: one with a uniform large field of depth and one where the field was effectively flat. Each of eleven, pre-screened, subjects completed four experiments, each consisting of eight trials in a 2IFC design whereby they indicated in which interval they perceived the greatest field of depth. The experiments tested one-eye static, one-eye head-swaying, two-eye static, and two-eye head-swaying observation--in that order. Scores improved also in that order.},
    url = {http://vic.crs4.it/vic/cgi-bin/bib-page.cgi?id='Brelstaff:2007:PDE'},
}