A hybrid ray-wave optics model to study the scattering behavior of silver metallic paint systems

Seubert, Christopher; Nichols, Mark; Kappauf, C.; Ellwood, Kevin; Shtein, Max; Thouless, M.D.

doi:10.1007/s11998-017-0028-1

Cited by 4 publications

(1 citation statement)

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“…It has already been shown that these flake-based parameters are much more effective for representing BRDF functions than the common viewing and illumination angles [25] [29]. By using an accurate interpolation of the BRDF, the new rendering pipeline is computationally much faster than when the full measured BRDF data need to be used, as is the case for some existing rendering approaches [30]. For example, the TAC7 instrument that was recently launched by X-Rite is capable of producing impressive rendering of e.g.…”

Section: Physics-based Brdf Interpolationmentioning

confidence: 99%

Real-time accurate rendering of color and texture of car coatings

Kirchner¹,

Lans²,

Koeckhoven³

et al. 2019

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The digital representation of three dimensional objects with different materials has become common not only in the games and movie industry, but also in designer software, e-commerce and other applications. Although the rendered images often seem to be realistic, a closer look reveals that their color accuracy is often insufficient for critical applications. Storage of the angledependent color properties of metallic coatings and other gonioapparent materials demands large amounts of data. Apart from that, also rendering sparkle, gloss and other visual texture phenomena is still a subject of active research. Current approaches are computationally very demanding, and require manual ad-hoc setting of many model parameters. In this paper, we describe a new approach to solve these problems. We combine a multi-spectral physics-based approach to make BRDF representation more efficient. We also account for the common loss in color accuracy due to the varying technical specifications of displays, and we correct for the influence from ambient lighting. The rendering framework presented here is shown to be capable of rendering sparkle and gloss as well, based on objective measurement of these properties. This takes out the subjective phase of manual fine-tuning of model parameters that is characteristic for many current rendering approaches. A feasibility test with the new spectral rendering pipeline shows that is indeed able to produce realistic rendering of color, sparkle, gloss and other texture aspects. The computation time is small enough to make the rendering real-time on an iPad 2017, i.e. with low memory footprint and without high demands on graphic card or data storage.

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Section: Physics-based Brdf Interpolationmentioning

confidence: 99%