Prof. Qifeng Ren Profile

Prof. Qifeng Ren

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Proceedings Article | 1 February 2024 Paper

Modeling and analysis of spectral polarization BRDF using dispersion model

Baorui Huang, Bo Peng, Qifeng Ren, Sheng Liao

Proceedings Volume 13068, 130680W (2024) https://doi.org/10.1117/12.3016324

KEYWORDS: Bidirectional reflectance transmission function, Data modeling, Refractive index, Polarization, Reflection, Spectral models

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The bidirectional reflectance distribution function (BRDF) integrates reflection and scattering phenomena to describe the spatial reflection characteristics of the object surface. A modified spectral expression for the complex refractive index of the medium is established using the Drude-Lorentz dispersion model, and it is substituted into the polarization microfacet BRDF to obtain a spectral polarization BRDF(p-BRDF) based on the microfacet theory. Particle swarm optimization algorithm is used to fit the parameters in the model by combining the complex refractive index data and in-plane BRDF data of brass, the optimal standard mean squared error of parameter selection is 0.01. The simulated data is highly consistent with the experimental data, and the optimal adjusted R² is 0.9854. The results indicate that the spectral p-BRDF model combined with limited experimental data can effectively predict the spatial reflection characteristics of object surfaces.

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