TU Darmstadt / ULB / TUbiblio

Seamless and non-repetitive 4D texture variation synthesis and real-time rendering for measured optical material behavior

Ritz, Martin and Breitfelder, Simon and Santos, Pedro and Kuijper, Arjan and Fellner, Dieter W. (2019):
Seamless and non-repetitive 4D texture variation synthesis and real-time rendering for measured optical material behavior.
In: Computational Visual Media, Springer, ISSN 2096-0433,
DOI: 10.1007/s41095-019-0141-4,
[Online-Edition: https://doi.org/10.1007/s41095-019-0141-4],
[Article]

Abstract

We show how to overcome the single weakness of an existing fully automatic system for acquisition of spatially varying optical material behavior of real object surfaces. While the expression of spatially varying material behavior with spherical dependence on incoming light as a 4D texture (an ABTF material model) allows flexible mapping onto arbitrary 3D geometry, with photo-realistic rendering and interaction in real time, this very method of texture-like representation exposes it to common problems of texturing, striking in two disadvantages. Firstly, non-seamless textures create visible artifacts at boundaries. Secondly, even a perfectly seamless texture causes repetition artifacts due to their organised placement in large numbers over a 3D surface. We have solved both problems through our novel texture synthesis method that generates a set of seamless texture variations randomly distributed over the surface at shading time. When compared to regular 2D textures, the inter-dimensional coherence of the 4D ABTF material model poses entirely new challenges to texture synthesis, which includes maintaining the consistency of material behavior throughout the 4D space spanned by the spatial image domain and the angular illumination hemisphere. In addition, we tackle the increased memory consumption caused by the numerous variations through a fitting scheme specifically designed to reconstruct the most prominent effects captured in the material model.

Item Type: Article
Erschienen: 2019
Creators: Ritz, Martin and Breitfelder, Simon and Santos, Pedro and Kuijper, Arjan and Fellner, Dieter W.
Title: Seamless and non-repetitive 4D texture variation synthesis and real-time rendering for measured optical material behavior
Language: English
Abstract:

We show how to overcome the single weakness of an existing fully automatic system for acquisition of spatially varying optical material behavior of real object surfaces. While the expression of spatially varying material behavior with spherical dependence on incoming light as a 4D texture (an ABTF material model) allows flexible mapping onto arbitrary 3D geometry, with photo-realistic rendering and interaction in real time, this very method of texture-like representation exposes it to common problems of texturing, striking in two disadvantages. Firstly, non-seamless textures create visible artifacts at boundaries. Secondly, even a perfectly seamless texture causes repetition artifacts due to their organised placement in large numbers over a 3D surface. We have solved both problems through our novel texture synthesis method that generates a set of seamless texture variations randomly distributed over the surface at shading time. When compared to regular 2D textures, the inter-dimensional coherence of the 4D ABTF material model poses entirely new challenges to texture synthesis, which includes maintaining the consistency of material behavior throughout the 4D space spanned by the spatial image domain and the angular illumination hemisphere. In addition, we tackle the increased memory consumption caused by the numerous variations through a fitting scheme specifically designed to reconstruct the most prominent effects captured in the material model.

Journal or Publication Title: Computational Visual Media
Publisher: Springer
Uncontrolled Keywords: Texture synthesis, Texturing, Reflectance, Optical material behavior, Bidirectional texturing function (BTF)
Divisions: 20 Department of Computer Science
20 Department of Computer Science > Interactive Graphics Systems
20 Department of Computer Science > Mathematical and Applied Visual Computing
Date Deposited: 01 Jul 2019 08:41
DOI: 10.1007/s41095-019-0141-4
Official URL: https://doi.org/10.1007/s41095-019-0141-4
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item