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Communication Dans Un Congrès Année : 2007

Influence of motion on contrast perception: supra-threshold spatio-velocity CSF measurements

Résumé

In this paper, a supra-threshold spatio-velocity CSF experiment is described. It consists in a contrast matching task with a methods of limits procedure. Results enable the determination of contrast perception functions which give, for given spatial and temporal frequencies, the perceived contrast of a moving stimulus. These contrast perception functions are then used to construct supra-threshold spatio-velocity CSF. As for supra-threshold CSF in spatial domain, it can be observed that CSF shape changes from band-pass behaviour at threshold to low-pass behaviour at supra-threshold, along spatial frequencies. However, supra-threshold CSFs have a band-pass behaviour along temporal frequency has threshold one. This means that if spatial variations can be neglected above the visibility threshold, temporal ones are still of primary importance.
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Dates et versions

hal-00252676 , version 1 (12-02-2008)

Identifiants

  • HAL Id : hal-00252676 , version 1

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Sylvain Tourancheau, Patrick Le Callet, Dominique Barba. Influence of motion on contrast perception: supra-threshold spatio-velocity CSF measurements. Human Vision and Electronic Imaging XII., Feb 2007, San Jose, CA, United States. pp.64921M. ⟨hal-00252676⟩
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