Stereoscopy for visual simulation of materials of complex appearance

Fernando da Graça 1 Alexis Paljic 1 Dominique Lafon-Pham 2 Patrick Callet 3
1 CAOR - Centre de Robotique
2 C2MA - Centre des Matériaux des Mines d'Alès
3 Ecole Centrale Paris
Abstract : The present work studies the role of stereoscopy on perceived surface aspect of computer generated complex materials. The objective is to investigate if, and how, the additional information conveyed by the binocular vision affects the observer judgment on the evaluation of flake density in an effect paint simulation. We have set up a heuristic flake model with a VoronoÏ modelization of flakes. The model was implemented in our rendering engine using global illumination, ray tracing, with an off axis-frustum method for the calculation of stereo pairs. We conducted a user study based on a flake density discrimination task to determine Perception Thresholds (JNDs). We obtained small JNDs variations when expressed on Weber fractions: 3.62%, and 3.45% for the monoscopic- and for the stereoscopic-condition. Our results are discussed on the basis of the flake density scale obtained by morphology image processing techniques.
Keywords : virtual reality predictive rendering complex materials metallic paints stereoscopy perception threshold
Type de document :
Communication dans un congrès
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00969580
Contributeur : Alexis Paljic <>
Soumis le : mercredi 2 avril 2014 - 15:16:43
Dernière modification le : jeudi 9 janvier 2020 - 11:38:19

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  • HAL Id : hal-00969580, version 1

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EC-PARIS | PARISTECH | ENSMP | ENSMP_CAOR | PSL | INSTITUT-TELECOM | EM-ALES

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Fernando da Graça, Alexis Paljic, Dominique Lafon-Pham, Patrick Callet. Stereoscopy for visual simulation of materials of complex appearance. Stereoscopic Displays and Applications XXV, Feb 2014, San Francisco, United States. pp.9011-30. ⟨hal-00969580⟩

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