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Experimental and Data Analysis Workflow for Soft Matter Nanoindentation
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Developing a generalized BRDF model from experimental data.

Ingmar G E Renhorn, Glenn D Boreman

    Optics Express
    |August 19, 2018
    PubMed
    Summary

    This study introduces a physics-based Bidirectional Reflectance Distribution Function (BRDF) model. It accurately predicts material reflectance from limited experimental data for applications in scene generation and sensor performance.

    Area of Science:

    • Optics and Photonics
    • Computer Graphics
    • Materials Science

    Background:

    • Bidirectional Reflectance Distribution Function (BRDF) modeling is crucial for realistic rendering and sensor simulation.
    • Developing accurate BRDF models often requires extensive experimental data.
    • Existing models may lack the flexibility to incorporate diverse scattering phenomena.

    Purpose of the Study:

    • To present a physics-based BRDF model adaptable to varying levels of experimental data.
    • To enable predictive applications in scene generation and sensor performance.
    • To accurately capture complex scattering behaviors in materials.

    Main Methods:

    • The model utilizes basic input parameters like complex refractive index or Directional Hemispherical Reflectivity (DHR).

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  • It incorporates at least one BRDF measurement to define the angular spread function.
  • Additional BRDF measurements at various incidence angles enhance model accuracy for specific phenomena.

    • Main Results:

    • The model successfully describes forward scatter and depolarization effects.
    • It accounts for volumetric and surface scattering in layered materials.
    • Demonstrated accuracy on diverse materials including bead-blasted aluminum and automotive paints.

    Conclusions:

    • The developed BRDF model offers a flexible and accurate approach using limited experimental data.
    • It enhances predictive capabilities for computer graphics and sensor applications.
    • The physics-based framework allows for detailed material reflectance characterization.