Perceptually Validated Cross-Renderer Analytical BRDF Parameter Remapping

Authors: Guarnera, D., Guarnera, G.C., Toscani, M., Glencross, M., Li, B., Hardeberg, J.Y. and Gegenfurtner, K.R.

Journal: IEEE Transactions on Visualization and Computer Graphics

Volume: 26

Issue: 6

Pages: 2258-2272

eISSN: 1941-0506

ISSN: 1077-2626

DOI: 10.1109/TVCG.2018.2886877

Abstract:

Material appearance of rendered objects depends on the underlying BRDF implementation used by rendering software packages. A lack of standards to exchange material parameters and data (between tools) means that artists in digital 3D prototyping and design, manually match the appearance of materials to a reference image. Since their effect on rendered output is often non-uniform and counter intuitive, selecting appropriate parameterisations for BRDF models is far from straightforward. We present a novel BRDF remapping technique, that automatically computes a mapping (BRDF Difference Probe) to match the appearance of a source material model to a target one. Through quantitative analysis, four user studies and psychometric scaling experiments, we validate our remapping framework and demonstrate that it yields a visually faithful remapping among analytical BRDFs. Most notably, our results show that even when the characteristics of the models are substantially different, such as in the case of a phenomenological model and a physically-based one, our remapped renderings are indistinguishable from the original source model.

Source: Scopus

Perceptually Validated Cross-Renderer Analytical BRDF Parameter Remapping.

Authors: Guarnera, D., Guarnera, G.C., Toscani, M., Glencross, M., Li, B., Hardeberg, J.Y. and Gegenfurtner, K.R.

Journal: IEEE Trans Vis Comput Graph

Volume: 26

Issue: 6

Pages: 2258-2272

eISSN: 1941-0506

DOI: 10.1109/TVCG.2018.2886877

Abstract:

Material appearance of rendered objects depends on the underlying BRDF implementation used by rendering software packages. A lack of standards to exchange material parameters and data (between tools) means that artists in digital 3D prototyping and design, manually match the appearance of materials to a reference image. Since their effect on rendered output is often non-uniform and counter intuitive, selecting appropriate parameterisations for BRDF models is far from straightforward. We present a novel BRDF remapping technique, that automatically computes a mapping (BRDF Difference Probe) to match the appearance of a source material model to a target one. Through quantitative analysis, four user studies and psychometric scaling experiments, we validate our remapping framework and demonstrate that it yields a visually faithful remapping among analytical BRDFs. Most notably, our results show that even when the characteristics of the models are substantially different, such as in the case of a phenomenological model and a physically-based one, our remapped renderings are indistinguishable from the original source model.

Source: PubMed

Perceptually Validated Cross-Renderer Analytical BRDF Parameter Remapping

Authors: Guarnera, D., Guarnera, G.C., Toscani, M., Glencross, M., Li, B., Hardeberg, J.Y. and Gegenfurtner, K.R.

Journal: IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS

Volume: 26

Issue: 6

Pages: 2258-2272

eISSN: 1941-0506

ISSN: 1077-2626

DOI: 10.1109/TVCG.2018.2886877

Source: Web of Science (Lite)

Perceptually Validated Cross-Renderer Analytical BRDF Parameter Remapping.

Authors: Guarnera, D., Guarnera, G.C., Toscani, M., Glencross, M., Li, B., Hardeberg, J.Y. and Gegenfurtner, K.R.

Journal: IEEE transactions on visualization and computer graphics

Volume: 26

Issue: 6

Pages: 2258-2272

eISSN: 1941-0506

ISSN: 1077-2626

DOI: 10.1109/tvcg.2018.2886877

Abstract:

Material appearance of rendered objects depends on the underlying BRDF implementation used by rendering software packages. A lack of standards to exchange material parameters and data (between tools) means that artists in digital 3D prototyping and design, manually match the appearance of materials to a reference image. Since their effect on rendered output is often non-uniform and counter intuitive, selecting appropriate parameterisations for BRDF models is far from straightforward. We present a novel BRDF remapping technique, that automatically computes a mapping (BRDF Difference Probe) to match the appearance of a source material model to a target one. Through quantitative analysis, four user studies and psychometric scaling experiments, we validate our remapping framework and demonstrate that it yields a visually faithful remapping among analytical BRDFs. Most notably, our results show that even when the characteristics of the models are substantially different, such as in the case of a phenomenological model and a physically-based one, our remapped renderings are indistinguishable from the original source model.

Source: Europe PubMed Central