Environnements lumineux naturels en mode : Spectral et Polarisé. Modélisation, Acquisition, Simulation

Abstract : In the field of computer graphics, the simulation of the visual appearance of materials requires, a rigorous solving of the light transport equation. This implies to incorporate into models all elements that can influence the spectral received by human eyes. The characterization of the reflectance properties of materials, still subject to many researches is very advanced. However, the uses of environment maps, to simulate their visual behaviors remain essentially trichromaticity. Characterize the natural light with precision, is an old question. Today, there are no environment maps, including both spectral radiance and polarization informations, corresponding to a real sky. It was therefore necessary for us to design and propose to the computer graphics community a full of bright environments exploitable in a rendering engine adapted accordingly. In this work, we use the results of other scientific fields as meteorology, climatology..., to propose a new model of clear sky. As all actual situations are not addressed by this method, we develop and characterize an environment capturing device both incorporating the light dynamic range, the spectral distribution and the polarization states.
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Philippe Porral. Environnements lumineux naturels en mode : Spectral et Polarisé. Modélisation, Acquisition, Simulation. Synthèse d'image et réalité virtuelle [cs.GR]. PSL Research University, 2016. Français. ⟨NNT : 2016PSLEM067⟩. ⟨tel-01709764⟩

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